Jump to content

20 Years Ago: First Image of Earth from Mars and Other Postcards of Home


NASA

Recommended Posts

  • Publishers

On March 8, 2004, the Mars Exploration Rover Spirit took the first image of Earth from the surface of another planet. The Earth appearing as nothing more than a bright star provided a new perspective on our home planet, a perspective reshaped over the past eight decades as cameras aboard rockets and spacecraft traveled farther and farther away. From sounding rockets in the 1940s and Earth orbiting satellites in the early 1960s to spacecraft and people traveling to the Moon in the late 1960s and early 1970s and since then to spacecraft exploring all reaches of our solar system, the images of Earth they sent back expanded our horizons while showing an ever-smaller pale blue dot in the vastness of space.

The Mars Exploration Rover Spirit photographed Earth before sunrise in 2004 The Mars Science Laboratory Curiosity rover photographed the Earth-Moon system in 2014
Left: The Mars Exploration Rover Spirit photographed Earth before sunrise in 2004. Right: The Mars Science Laboratory Curiosity rover photographed the Earth-Moon system in 2014.

Shortly after landing in Mars’ Gusev Crater on Jan. 4, 2004, Spirit began sending to Earth remarkable photos of its surroundings. On March 8, it turned its camera skyward in an attempt to photograph the Martian moon Deimos partially eclipsing the Sun as it transited across its disc. Shortly before sunrise, Spirit’s camera managed to capture Earth as a bright star, appearing much as Venus does to terrestrial observers. This marked the first photograph of Earth from another planetary surface. Nearly a decade passed before another rover, the Mars Science Laboratory Curiosity, took another photograph of Earth from its location in Mars’ Gale Crater. The image taken on Jan. 31, 2014, from 99 million miles away, also captured the Moon. These images, and others taken of Earth from ever-more distant vantage points over the past eight decades, provided a new perspective of our home planet’s place in our solar system. Enjoy the following postcards of Earth over the decades.

The first image of Earth taken from space in 1946 by a suborbital rocket, from an altitude of 65 miles The first photograph of Earth taken from orbit, by the Explorer 6 satellite The first television image of Earth, transmitted by the TIROS-1 weather satellite in 1960
Left: The first image of Earth taken from space in 1946 by a suborbital rocket, from an altitude of 65 miles. Image credit: courtesy White Sands Missile Range/Applied Physics Laboratory. Middle: The first photograph of Earth taken from orbit, by the Explorer 6 satellite. Right: The first television image of Earth, transmitted by the TIROS-1 weather satellite in 1960.

On Oct. 24, 1946, more than 10 years before the launch of the first artificial satellite Sputnik, scientists at the White Sands Missile Range in New Mexico placed a camera on top of a captured German V-2 ballistic missile. As the rocket flew to an altitude of about 65 miles – just above the generally recognized border of outer space – the 35-mm motion picture camera snapped a frame every one and a half seconds. Minutes later, the missile came crashing back down and slammed into the ground at more than 340 miles per hour, but the film survived and gave us our first glimpse of Earth from space. On Aug. 14, 1959, the Explorer 6 satellite took the first photograph of Earth from orbit about 17,000 miles high, but the image lacked detail. On April 1, 1960, from an orbital altitude of about 450 miles, the TIROS-1 weather satellite returned the first of its 23,000 television images of the Earth, most of them of sufficient quality for the satellite’s main purpose, weather forecasting.

The first full-disk photograph of Earth, taken by the Soviet Molniya 1-3 communications satellite in 1966 The first image of Earth taken from geostationary orbit, by the Advanced Technology Satellite-1 (ATS-1) satellite in 1966 The first color image of the full Earth from the DODGE (Department of Defense Gravity Experiment) satellite in 1967
Left: The first full-disk photograph of Earth, taken by the Soviet Molniya 1-3 communications satellite in 1966. Middle: The first image of Earth taken from geostationary orbit, by the Advanced Technology Satellite-1 (ATS-1) satellite in 1966. Right: The first color image of the full Earth from the DODGE (Department of Defense Gravity Experiment) satellite in 1967.

The Soviet Molniya 1-3 communications satellite took the first photograph showing the Earth as a full disk on May 30, 1966, although the image quality was somewhat poor. On Dec. 11, 1966, the ATS-1 advanced technology satellite beamed back the first photograph of Earth from geostationary orbit 22,300 miles above Ecuador. The Department of Defense Gravity Experiment (DODGE) satellite returned the first color image of the full Earth in August 1967.

The original photo, top, of Earth taken from lunar orbit by the Lunar Orbiter 1 spacecraft in 1966, and a 2008 digitized version by the Lunar Orbiter Image Recovery Project (LOIRP) The first color image of Earth taken from the surface of the Moon by Surveyor 3 in 1967
Left: The original photo, top, of Earth taken from lunar orbit by the Lunar Orbiter 1 spacecraft in 1966, and a 2008 digitized version by the Lunar Orbiter Image Recovery Project (LOIRP). Image credit: courtesy LOIRP.  Right: The first color image of Earth taken from the surface of the Moon by Surveyor 3 in 1967.

The primary purpose of early robotic spacecraft to the Moon was to prepare for the crewed Apollo missions that followed, including extensive photography of the lunar terrain from orbit and from the surface. The first of five Lunar Orbiter spacecraft designed to map the Moon’s surface from orbit took the first photograph of Earth from lunar distances on Aug. 23, 1966. A digital reconstruction of the original frame in 2008 as part of the Lunar Orbiter Image Recovery Project removed the scan lines and other imperfections. The Surveyor 3 robotic lander, later visited by the Apollo 12 astronauts, took the first photograph of Earth from the lunar surface on April 30, 1967.

The famous Earthrise photograph taken during the Apollo 8 crew’s first orbit around the Moon in 1968 The first photograph of Earth taken by an astronaut standing on the lunar surface, taken during the Apollo 11 Moon landing in 1969 The famous Blue Marble image taken by Apollo 17 astronauts on their way to the Moon in 1972 Earth and Moon photographed during the Artemis I uncrewed mission in 2022
Left: The famous Earthrise photograph taken during the Apollo 8 crew’s first orbit around the Moon in 1968. Middle left: The first photograph of Earth taken by an astronaut standing on the lunar surface, taken during the Apollo 11 Moon landing in 1969. Middle right: The famous Blue Marble image taken by Apollo 17 astronauts on their way to the Moon in 1972. Right: Earth and Moon photographed during the Artemis I uncrewed mission in 2022.

The Apollo missions of the late 1960s and early 1970s returned thousands of stunning and memorable images of humanity’s first exploration of another world. Among them are photographs of the Earth taken by the astronauts that show how small and fragile our planet can appear against the blackness and vastness of space. Arguably, the most famous is the Earthrise photos taken during Apollo 8, the first crewed mission to orbit the Moon in December 1968. The image of the smooth blue ball of Earth appearing suspended over the battered gray lunar terrain provided inspiration for the ecology movement of the time. In July 1969, the first human lunar landing mission, Apollo 11, returned many iconic photographs of Neil A. Armstrong and Edwin E. “Buzz” Aldrin on the surface, and also included the first image of the Earth taken by an astronaut on the Moon. In December 1972, astronauts on the final Apollo lunar landing mission, Apollo 17, took the famous Blue Marble image of the Earth from 72,000 miles away on their way to the Moon. More recently, in November 2012, the uncrewed Artemis I mission imaged the Moon and Earth together, from a distance of 268,563 miles from Earth.

A composite of two separate images of the Earth and Moon, taken by Mariner 10 in 1973 as it headed toward encounters with Venus and Mercury The first image of the Earth-Moon system in a single photographic frame taken by Voyager 1 in 1977 as it departed on its journey to explore Jupiter, Saturn, and beyond The first image of Earth taken by a planetary spacecraft, Galileo, as it made a return encounter with its home planet for a gravity assist in 1990
Left: A composite of two separate images of the Earth and Moon, taken by Mariner 10 in 1973 as it headed toward encounters with Venus and Mercury. Middle: The first image of the Earth-Moon system in a single photographic frame taken by Voyager 1 in 1977 as it departed on its journey to explore Jupiter, Saturn, and beyond. Right: The first image of Earth taken by a planetary spacecraft, Galileo, as it made a return encounter with its home planet for a gravity assist in 1990. 

As planetary spacecraft carried increasingly sophisticated instruments in the 1970s, some turned their cameras toward the Earth as they departed on their long voyages of exploration. In November 1973, a few days after Mariner 10 launched on its mission to explore Venus and Mercury, it snapped separate photographs of the Earth and the Moon, that technicians combined into a composite photo. On Sept. 18, 1977, at a distance of 7.25 million miles, the Jupiter-bound Voyager 1 snapped the first photograph of the Earth-Moon system in a single frame, providing an impression of the view from a spacecraft approaching our home planet. The Galileo spacecraft did exactly that – on Dec. 8, 1990, more than two years after its launch, it passed within 600 miles of Earth, using the planet for a gravity assist to reach Jupiter. During the fly-by, Galileo used its sophisticated instruments and cameras to study Earth as an unexplored planet and detected chemical signatures in atmospheric trace elements associated with life-form activity. 

Voyager 1’s family portrait of six planets, when the spacecraft was 3.7 billion miles from Earth in 1990
Voyager 1’s family portrait of six planets, when the spacecraft was 3.7 billion miles from Earth in 1990.

Pale Blue Dot Revisited, NASA’s 2020 remastered version of the Voyager 1 image of Earth
Pale Blue Dot Revisited, NASA’s 2020 remastered version of the Voyager 1 image of Earth.

On Feb. 14, 1990, more than 12 years after it began its journey from Earth and shortly before controller permanently turned off its cameras to conserve power, Voyager 1 spun around and pointed them back into the solar system. In a mosaic of 60 images, it captured a “family portrait” of six of the solar system’s planets, including a pale blue dot called Earth more than 3.7 billion miles away. In February 2020, to commemorate the photograph’s 30th anniversary, NASA released a remastered version of the image of Earth as Pale Blue Dot Revisited.

MESSENGER’s family portrait of the planets, taken from approximately the orbit of Mercury in 2010
MESSENGER’s family portrait of the planets, taken from approximately the orbit of Mercury in 2010.

Twenty years later, and from a very different part of the solar system, came another family portrait of the planets. From near the orbit of Mercury, the MESSENGER spacecraft took 34 images on Nov. 3 and 16, 2010, that engineers stitched together. The composite shows six planets, Venus, Earth, Jupiter, Mars, Mercury, and Saturn, and even several planetary satellites including the Moon and Jupiter’s four Galilean moons Callisto, Ganymede, Europa, and Io.

Earth and Moon photographed by the Mars Global Surveyor spacecraft in orbit around Mars in 2003 Earth and Moon photographed by the European Space Agency’s Mars Express spacecraft in orbit around Mars in 2003 Earth and Moon photographed by the Mars Reconnaissance Orbiter in orbit around Mars in 2007
Left: Earth and Moon photographed by the Mars Global Surveyor spacecraft in orbit around Mars in 2003. Middle: Earth and Moon photographed by the European Space Agency’s Mars Express spacecraft in orbit around Mars in 2003. Right: Earth and Moon photographed by the Mars Reconnaissance Orbiter in orbit around Mars in 2007.

Even before Spirit returned the first photo of Earth from the surface of Mars, spacecraft in orbit around the Red Planet took amazing photos of the Earth-Moon system with their telescopic high-resolution cameras. Mars Global Surveyor took the first photograph of the Earth-Moon system from Mars orbit in May 2003, the two planets 86 million miles apart. Given the Moon’s position in its orbit around Earth, the two bodies appeared close together. Two months later, in July 2003, the European Space Agency’s (ESA) Mars Express spacecraft photographed them appearing much further apart, given the Moon’s orbital position. In October 2007, Mars Reconnaissance Orbiter used its HiRISE camera to take a more detailed shot of the Earth-Moon system. Because Earth orbits closer to the Sun than Mars, it goes through phases, much as Mercury and Venus do as viewed from Earth.

The Earth-Moon system as seen from the Cassini spacecraft in orbit around Saturn in 2013
The Earth-Moon system as seen from the Cassini spacecraft in orbit around Saturn in 2013.

On July 19, 2013, the Cassini spacecraft in orbit around Saturn took a series of images from a distance of about 750,000 miles as the planet eclipsed the Sun. In the event dubbed The Day the Earth Smiled, people on Earth received notification in advance that Cassini would be taking their picture from 900 million miles away, and were encouraged to smile at its camera. In addition to the Earth and Moon, Cassini captured Venus, Mars, and seven of Saturn’s satellites in the photograph.

The MESSENGER spacecraft in orbit around Mercury took this photograph of Earth and Moon in 2013 The Parker Solar Probe photographed Earth through the solar corona from well inside the orbit of Mercury in 2023
Left: The MESSENGER spacecraft in orbit around Mercury took this photograph of Earth and Moon in 2013. Right: The Parker Solar Probe photographed Earth through the solar corona from well inside the orbit of Mercury in 2023.

On the same day that Cassini imaged Earth and other planets from Saturn, the MESSENGER spacecraft in orbit around Mercury, during a search for possible moons orbiting the small planet, took a photograph of the Earth-Moon system from 61 million miles away. The Parker Solar Probe, during its 16th close pass of the Sun in June 2023, took a series of photographs through the Sun’s corona, imaging several planets including Earth in the process. Engineers stitched the images together to create an amazing video of the solar corona and a coronal mass ejection. The view is from well inside Mercury’s orbit.

The European Space Agency’s Solar Orbiter took this mini-family portrait in November 2020
The European Space Agency’s Solar Orbiter took this mini-family portrait in November 2020.

The ESA Solar Orbiter spacecraft’s primary objectives focus on studying the Sun from close distances. These orbits enable it to photograph several planets at once. On Nov. 18, 2020, Solar Orbiter imaged Venus, Earth, and Mars in one frame.

We hope you enjoyed this review of how photographs of Earth over the past 80 years have changed our perspectives of our home planet, and also of our own place in the universe. Future human space explorers, whatever their destinations, will always look back and try to find their home planet in whatever sky it may shine, and hopefully share their experiences with us through photographs we can only dream about today.

View the full article

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By Space Force
      Over the past two years, the first U.S. space service component has tripled in size, established a 24/7 space watch cell and executed three Tier 1 Combatant Command exercises.

      View the full article
    • By European Space Agency
      Image: This Copernicus Sentinel-2 image from 13 November 2024 shows the Lewotobi Laki Laki volcano eruption on the island of Flores in southern Indonesia. View the full article
    • By NASA
      Curiosity Navigation Curiosity Home Mission Overview Where is Curiosity? Mission Updates Science Overview Instruments Highlights Exploration Goals News and Features Multimedia Curiosity Raw Images Images Videos Audio Mosaics More Resources Mars Missions Mars Sample Return Mars Perseverance Rover Mars Curiosity Rover MAVEN Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions The Solar System The Sun Mercury Venus Earth The Moon Mars Jupiter Saturn Uranus Neptune Pluto & Dwarf Planets Asteroids, Comets & Meteors The Kuiper Belt The Oort Cloud 3 min read
      Sols 4368-4369: The Colors of Fall – and Mars
      This image shows all the textures — no color in ChemCam remote-imager images, though — that the Martian terrain has to offer. This image was taken by Chemistry & Camera (ChemCam) aboard NASA’s Mars rover Curiosity on Nov. 18, 2024 — sol 4367, or Martian day 4,367 of the Mars Science Laboratory mission — at 02:55:09 UTC. NASA/JPL-Caltech/LANL Earth planning date: Monday, Nov. 18, 2024
      I am in the U.K., where we are approaching the time when trees are just branches and twigs. One tree that still has its full foliage is my little quince tree in my front garden. Its leaves have turned reddish-brown with a hint of orange, fairly dark by now, and when I passed it this afternoon on my way to my Mars operations shift, I thought that these leaves have exactly the colors of Mars! And sure enough, today’s workspace is full of bedrock blocks in the beautiful reddish-brown that we love from Mars. But like that tree, it’s not just one color, but many different versions and patterns, all of many reddish-brown and yellowish-brown colors.
      The tree theme continues into the naming of our targets today, with ChemCam observing the target “Big Oak Flat,” which is a flat piece of bedrock with a slightly more gray hue to it. “Calaveras,” in contrast, looks a lot more like my little tree, as it is more reddish and less gray. It’s also a bedrock target, and APXS and MAHLI are observing this target, too. APXS has another bedrock target, called “Murphys” on one of the many bedrock pieces around. MAHLI is of course documenting Murphys, too. Let’s just hope that this target name doesn’t get any additions to it but instead returns perfect data from Mars!
      ChemCam is taking several long-distance remote micro-imager images — one on the Gediz Vallis Ridge, and one on target “Mono Lake,” which is also looking at the many, many different textures and stones in our surroundings. The more rocks, the more excited a team of geologists gets! So, we are surely using every opportunity to take images here!
      Talking about images… Mastcam is taking documentation images on the Big Oak Flat and Calaveras targets, and a target simply called “trough.” In addition, there are mosaics on “Basket Dome” and “Chilkoot,” amounting to quite a few images of this diverse and interesting terrain! More images will be taken by the navigation cameras for the next drive — and also our Hazcam. We rarely talk about the Hazcams, but they are vital to our mission! They look out from just under the rover belly, forward and backward, and have the important task to keep our rover safe. The forward-looking one is also great for planning purposes, to know where the arm can reach with APXS, MAHLI, and the drill. To me, it’s also one of the most striking perspectives, and shows the grandeur of the landscape so well. If you want to see what I am talking about, have a look at “A Day on Mars” from January of this year.
      Of course, we have atmospheric measurements in the plan, too. The REMS sensor is measuring temperature and wind throughout the plan, and Curiosity will be taking observations to search for dust devils, and look at the opacity of the atmosphere. Add DAN to the plan, and it is once again a busy day for Curiosity on the beautifully red and brown Mars. And — hot off the press — all about another color on Mars: yellowish-white!
      Written by Susanne Schwenzer, Planetary Geologist at The Open University
      Share








      Details
      Last Updated Nov 20, 2024 Related Terms
      Blogs Explore More
      3 min read Sols 4366–4367: One of Those Days on Mars (Sulfate-Bearing Unit to the West of Upper Gediz Vallis)


      Article


      2 days ago
      2 min read Sols 4362-4363: Plates and Polygons


      Article


      1 week ago
      3 min read Peculiar Pale Pebbles
      During its recent exploration of the crater rim, Perseverance diverted to explore a strange, scattered…


      Article


      1 week ago
      Keep Exploring Discover More Topics From NASA
      Mars


      Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited…


      All Mars Resources


      Explore this collection of Mars images, videos, resources, PDFs, and toolkits. Discover valuable content designed to inform, educate, and inspire,…


      Rover Basics


      Each robotic explorer sent to the Red Planet has its own unique capabilities driven by science. Many attributes of a…


      Mars Exploration: Science Goals


      The key to understanding the past, present or future potential for life on Mars can be found in NASA’s four…

      View the full article
    • By NASA
      5 Min Read Making Mars’ Moons: Supercomputers Offer ‘Disruptive’ New Explanation
      A NASA study using a series of supercomputer simulations reveals a potential new solution to a longstanding Martian mystery: How did Mars get its moons? The first step, the findings say, may have involved the destruction of an asteroid. 
      The research team, led by Jacob Kegerreis, a postdoctoral research scientist at NASA’s Ames Research Center in California’s Silicon Valley, found that an asteroid passing near Mars could have been disrupted – a nice way of saying “ripped apart” – by the Red Planet’s strong gravitational pull.
      The team’s simulations show the resulting rocky fragments being strewn into a variety of orbits around Mars. More than half the fragments would have escaped the Mars system, but others would’ve stayed in orbit. Tugged by the gravity of both Mars and the Sun, in the simulations some of the remaining asteroid pieces are set on paths to collide with one another, every encounter further grinding them down and spreading more debris. 
      Many collisions later, smaller chunks and debris from the former asteroid could have settled into a disk encircling the planet. Over time, some of this material is likely to have clumped together, possibly forming Mars’ two small moons, Phobos and Deimos.
      To assess whether this was a realistic chain of events, the research team explored hundreds of different close encounter simulations, varying the asteroid’s size, spin, speed, and distance at its closest approach to the planet. The team used their high-performance, open-source computing code, called SWIFT, and the advanced computing systems at Durham University in the United Kingdom to study in detail both the initial disruption and, using another code, the subsequent orbits of the debris.
      In a paper published Nov. 20 in the journal Icarus, the researchers report that, in many of the scenarios, enough asteroid fragments survive and collide in orbit to serve as raw material to form the moons. 
      “It’s exciting to explore a new option for the making of Phobos and Deimos – the only moons in our solar system that orbit a rocky planet besides Earth’s,” said Kegerreis. “Furthermore, this new model makes different predictions about the moons’ properties that can be tested against the standard ideas for this key event in Mars’ history.”
      Two hypotheses for the formation of the Martian moons have led the pack. One proposes that passing asteroids were captured whole by Mars’ gravity, which could explain the moons’ somewhat asteroid-like appearance. The other says that a giant impact on the planet blasted out enough material – a mix of Mars and impactor debris – to form a disk and, ultimately, the moons. Scientists believe a similar process formed Earth’s Moon.
      The latter explanation better accounts for the paths the moons travel today – in near-circular orbits that closely align with Mars’ equator. However, a giant impact ejects material into a disk that, mostly, stays close to the planet. And Mars’ moons, especially Deimos, sit quite far away from the planet and probably formed out there, too. 
      “Our idea allows for a more efficient distribution of moon-making material to the outer regions of the disk,” said Jack Lissauer, a research scientist at Ames and co-author on the paper. “That means a much smaller ‘parent’ asteroid could still deliver enough material to send the moons’ building blocks to the right place.”
      It’s exciting to explore a new option for the making of Phobos and Deimos – the only moons in our solar system that orbit a rocky planet besides Earth’s.
      Jacob Kegerreis
      Postdoctoral research scientist at NASA’s Ames Research Center
      Testing different ideas for the formation of Mars’ moons is the primary goal of the upcoming Martian Moons eXploration (MMX) sample return mission led by JAXA (Japan Aerospace Exploration Agency). The spacecraft will survey both moons to determine their origin and collect samples of Phobos to bring to Earth for study. A NASA instrument on board, called MEGANE – short for Mars-moon Exploration with GAmma rays and Neutrons – will identify the chemical elements Phobos is made of and help select sites for the sample collection. Some of the samples will be collected by a pneumatic sampler also provided by NASA as a technology demonstration contribution to the mission. Understanding what the moons are made of is one clue that could help distinguish between the moons having an asteroid origin or a planet-plus-impactor source.
      Before scientists can get their hands on a piece of Phobos to analyze, Kegerreis and his team will pick up where they left off demonstrating the formation of a disk that has enough material to make Phobos and Deimos. 
      “Next, we hope to build on this proof-of-concept project to simulate and study in greater detail the full timeline of formation,” said Vincent Eke, associate professor at the Institute for Computational Cosmology at Durham University and a co-author on the paper. “This will allow us to examine the structure of the disk itself and make more detailed predictions for what the MMX mission could find.”  
      For Kegerreis, this work is exciting because it also expands our understanding of how moons might be born – even if it turns out that Mars’ own formed by a different route. The simulations offer a fascinating exploration, he says, of the possible outcomes of encounters between objects like asteroids and planets. These events were common in the early solar system, and simulations could help researchers reconstruct the story of how our cosmic backyard evolved. 
      This research is a collaborative effort between Ames and Durham University, supported by the Institute for Computational Cosmology’s Planetary Giant Impact Research group. The simulations used were run using the open-source SWIFT code, carried out on the DiRAC (Distributed Research Utilizing Advanced Computing) Memory Intensive service (“COSMA”), hosted by Durham University on behalf of the DiRAC High-Performance Computing facility.
      For news media:
      Members of the news media interested in covering this topic should reach out to the NASA Ames newsroom.
      Share
      Details
      Last Updated Nov 20, 2024 Related Terms
      Mars Ames Research Center Ames Research Center's Science Directorate General High-Tech Computing Mars Moons Martian Moon Exploration (MMX) Missions NASA Centers & Facilities Planets Technology The Solar System Explore More
      5 min read NASA’s Swift Reaches 20th Anniversary in Improved Pointing Mode
      After two decades in space, NASA’s Neil Gehrels Swift Observatory is performing better than ever…
      Article 1 hour ago 2 min read Gateway Tops Off
      Gateway’s Power and Propulsion Element is now equipped with its xenon and liquid fuel tanks.
      Article 2 hours ago 2 min read About the Office of the Chief Knowledge Officer (OCKO)
      Article 6 hours ago Keep Exploring Discover More Topics From NASA
      Missions
      Humans in Space
      Climate Change
      Solar System
      View the full article
    • By European Space Agency
      Video: 00:04:30 Explore the immense power of water as ESA’s Mars Express takes us on a flight over curving channels, streamlined islands and muddled ‘chaotic terrain’ on Mars, soaking up rover landing sites along the way.
      This beautiful flight around the Oxia Palus region of Mars covers a total area of approximately 890 000 km2, more than twice the size of Germany. Central to the tour is one of Mars’s largest outflow channels, Ares Vallis. It stretches for more than 1700 km2 and cascades down from the planet’s southern highlands to enter the lower-lying plains of Chryse Planitia.
      Billions of years ago, water surged through Ares Vallis, neighbouring Tiu Vallis, and numerous other smaller channels, creating many of the features observed in this region today.
      Enjoy the flight!
      After enjoying a spectacular global view of Mars we focus in on the area marked by the white rectangle. Our flight starts over the landing site of NASA’s Pathfinder mission, whose Sojourner rover explored the floodplains of Ares Vallis for 12 weeks in 1997. 
      Continuing to the south, we pass over two large craters named Masursky and Sagan. The partially eroded crater rim of Masursky in particular suggests that water once flowed through it, from nearby Tiu Vallis.
      The Masurky Crater is filled with jumbled blocks, and you can see many more as we turn north to Hydaspis Chaos. This ‘chaotic terrain’ is typical of regions influenced by massive outflow channels. Its distinctive muddled appearance is thought to arise when subsurface water is suddenly released from underground to the surface. The resulting loss of support from below causes the surface to slump and break into blocks of various sizes and shapes.
      Just beyond this chaotic array of blocks is Galilaei crater, which has a highly eroded rim and a gorge carved between the crater and neighbouring channel. It is likely that the crater once contained a lake, which flooded out into the surroundings. Continuing on, we see streamlined islands and terraced river banks, the teardrop-shaped island ‘tails’ pointing in the downstream direction of the water flow at the time.
      Crossing over Ares Vallis again, the flight brings us to the smoother terrain of Oxia Planum and the planned landing site for ESA’s ExoMars Rosalind Franklin rover. The primary goal of the mission is to search for signs of past or present life on Mars, and as such, this once water-flooded region is an ideal location.
      Zooming out, the flight ends with a stunning bird’s-eye view of Ares Vallis and its fascinating  water-enriched neighbourhood. 
      Disclaimer: This video is not representative of how Mars Express flies over the surface of Mars. See processing notes below.
      How the movie was made
      This film was created using the Mars Express High Resolution Stereo Camera Mars Chart (HMC30) data, an image mosaic made from single orbit observations of the High Resolution Stereo Camera (HRSC). The mosaic, centred at 12°N/330°E, is combined with topography information from the digital terrain model to generate a three-dimensional landscape. 
      For every second of the movie, 50 separate frames are rendered following a predefined camera path in the scene. A three-fold vertical exaggeration has been applied. Atmospheric effects such as clouds and haze have been added to conceal the limits of the terrain model. The haze starts building up at a distance of 300 km. 
      The HRSC camera on Mars Express is operated by the German Aerospace Center (DLR). The systematic processing of the camera data took place at the DLR Institute for Planetary Research in Berlin-Adlershof. The working group of Planetary Science and Remote Sensing at Freie Universität Berlin used the data to create the film.
      View the full article
  • Check out these Videos

×
×
  • Create New...