Jump to content

Saturn Seen from Far and Near


HubbleSite

Recommended Posts

low_STSCI-H-p0418a-k-1340x520.png

As Saturn grows closer through the eyes of the Cassini spacecraft, which is hurtling toward a rendezvous with the ringed world on June 30 (July 1, Universal Time), both Cassini and the Earth-orbiting Hubble Space Telescope snapped spectacular pictures of the planet and its magnificent rings. Cassini is approaching Saturn at an oblique angle to the Sun and from below the ecliptic plane. Cassini has a very diferent view of Saturn than Hubble's Earth-centered view. For the first time, astronomers can compare views of equal-sharpness of Saturn from two very different perspectives.

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 NASA
      Credit: NASA NASA has awarded a contract to Intuitive Machines, LLC of Houston, to support the agency’s lunar relay systems as part of the Near Space Network, operated by the agency’s Goddard Space Flight Center in Greenbelt, Maryland.
      This Subcategory 2.2 GEO to Cislunar Relay Services is a new firm-fixed-price, multiple award, indefinite-delivery/indefinite-quantity task order contract. The contract has a base period of five years with an additional 5-year option period, with a maximum potential value of $4.82 billion. The base ordering period begins Tuesday, Oct. 1, 2024, through Sept. 30, 2029, with the option period potentially extending the contract through Sept. 30, 2034.
      Lunar relays will play an essential role in NASA’s Artemis campaign to establish a long-term presence on the Moon. These relays will provide vital communication and navigation services for the exploration and scientific study of the Moon’s South Pole region. Without the extended coverage offered by lunar relays, landing opportunities at the Moon’s South Pole will be significantly limited due to the lack of direct communication between potential landing sites and ground stations on Earth.
      The lunar relay award also includes services to support position, navigation, and timing capabilities, which are crucial for ensuring the safety of navigation on and around the lunar surface. Under the contract, Intuitive Machines also will enable NASA to provide communication and navigation services to customer missions in the near space region.
      The initial task award will support the progressive validation of lunar relay capabilities/services for Artemis. NASA anticipates these lunar relay services will be used with human landing systems, the LTV (lunar terrain vehicle), and CLPS (Commercial Lunar Payload Services) flights.
      As lunar relay services become fully operational, they will be integrated into the Near Space Network’s expanding portfolio, enhancing communications and navigation support for future lunar missions. By implementing these new capabilities reliance on NASA’s Deep Space Network will be reduced.
      NASA’s goal is to provide users with communication and navigation services that are secure, reliable, and affordable, so that all NASA users receive the services required by their mission within their latency, accuracy, and availability requirements.
      This is another step in NASA partnering with U.S. industry to build commercial space partners to support NASA missions, including NASA’s long-term Moon to Mars objectives for interoperable communications and navigation capabilities.   This award is part of the Space Communications and Navigation (SCaN) Program and will be executed by the Near Space Network team at NASA Goddard.
      For information about NASA and agency programs, visit:
      https://www.nasa.gov
      -end-
      Joshua Finch
      Headquarters, Washington
      202-358-1100
      joshua.a.finch@nasa.gov
      Tiernan Doyle
      Headquarters, Washington
      202-358-1600
      tiernan.doyle@nasa.gov
      Share
      Details
      Last Updated Sep 17, 2024 LocationNASA Headquarters Related Terms
      Near Space Network Communicating and Navigating with Missions Goddard Space Flight Center Space Communications & Navigation Program Space Operations Mission Directorate View the full article
    • By NASA
      The dome-shaped Brandburg Massif, near the Atlantic coast of central Namibia, containing Brandberg Mountain, the African nation’s highest peak and ancient rock paintings going back at least 2,000 years, is pictured from the International Space Station as it orbited 261 miles above.
      Image Credit: NASA
      View the full article
    • By NASA
      On Aug. 29, 1789, German-born British astronomer William Herschel observed a tiny bright dot orbiting around Saturn. His son later named the object Enceladus. Because of its distance from Earth and proximity to bright Saturn, for the next two centuries little remained known about Enceladus other than its size, orbital parameters, and that it held the honor as the most reflective body in the solar system. It took the Voyager flybys through the Saturn system in the early 1980s and especially the detailed observations between 2005 and 2015 by the Saturn orbiter Cassini to reveal Enceladus as a truly remarkable world, interacting with Saturn and its rings. Harboring a subsurface ocean of salty water, Enceladus may possibly be hospitable to some forms of life.

      Left: Portrait (1785) of William Herschel by Lemuel Francis Abbott. Image credit: courtesy National Portrait Gallery, London. Middle: Drawing of Herschel’s 40-foot telescope. Right: Portrait (1867) of John Herschel by Julia Margaret Cameron. Image credit: Metropolitan Museum of Art.
      Herschel’s previous astronomical accomplishments include the discovery of Uranus in 1781 and two of its moons, Oberon and Titania, in 1787. He also catalogued numerous objects he termed nebulae, but remained frustrated by the limitations of telescopes of his age. He began to build ever larger instruments, finally building the world’s largest reflecting telescope of its time. At 40 feet long, and with a 49-inch diameter primary mirror weighing a ton, it looked impressive although its optical characteristics did not advance the field as much as he had hoped. Nevertheless, Herschel used this telescope to observe Saturn and its five known moons, looking for others. On Aug. 28, 1789, he observed a bright point orbiting the planet and believed he had discovered a sixth moon. On Sept. 17, he discovered a seventh moon orbiting the ringed planet. He did not name these moons, that task fell to his son John who believed Saturn’s moons should be named after the Titans of Greek mythology. He named the first moon Enceladus and the second Mimas.

      Left: Relative sizes of Earth, Earth’s Moon, and Enceladus. Right: Best Voyager 2 image of Enceladus.
      For nearly two centuries, Enceladus remained not much more than a point of light orbiting Saturn, just another icy moon in the outer solar system. Astronomers estimated its diameter at around 310 miles and its orbital period around Saturn at 1.4 days, with a mean distance from the planet’s center of 148,000 miles. Enceladus has the distinction as one of the brightest objects in the solar system, reflecting almost 100 percent of the Sun’s light. Unusual telescope observations during the 20th century showed an increase in brightness on its trailing side, with no known explanation at the time. In 1966, astronomers discovered a diffuse ring around Saturn, the E-ring, and found in 1980 that its density peaked near Enceladus. The Voyager 1 spacecraft flew within 125,570 miles of Enceladus during its passage through the Saturn system on Nov. 12, 1980. Its twin Voyager 2 came within 54,000 miles on Aug. 26, 1981, during its flyby. These close encounters enabled the spacecraft to return the first detailed images of the moon, showing various terrains, including heavily cratered areas as well as smooth crater-free areas, indicating a very young surface.

      Left: False color image of Enceladus from Cassini showing the tiger stripes at bottom. Middle: Limb view of Enceladus showing plumes of material emanating from its surface. Right: Cassini image of Enceladus backlit by the Sun showing the fountain-like plumes of material.
      After the Cassini spacecraft entered orbit around Saturn in July 2004, our understanding of Enceladus increased tremendously, and of course raised new questions. Between 2005 and 2015, Cassini encountered Enceladus 22 times, turning its various instruments on the moon to unravel its secrets. It noted early on that the moon emitted gas and dust or ice particles and that they interacted with the E-ring. Images of the moon’s south polar region revealed cracks on the surface and other instruments detected a huge cloud of water vapor over the area. The moon likely had a liquid subsurface and some of this material reached the outside through these cracks. Scientists named the most prominent of these areas “tiger stripes” and later observations confirmed them as the source of the most prominent jets. During the most daring encounter in October 2015, Cassini came within 30 miles of the Enceladus’ surface, flying through the plume of material emanating from the moon. Analysis of the plumes revealed an organic brew of volatile gases, water vapor, ammonia, sodium salts, carbon dioxide, and carbon monoxide. These plumes replenish Saturn’s E-ring, and some of this material enters Saturn’s upper atmosphere, an interaction unique in the solar system. More recently, the James Webb Space Telescope imaged the water vapor plume emanating from Enceladus’ south pole, extending out 40 times the size of the moon itself. The confirmation of a subsurface ocean of salty water has led some scientists to postulate that Enceladus may be hospitable to some forms of life, making it a potential target for future exploration. Enceladus may yet have more surprises, even as scientists continue to pore over the data returned by Cassini.

      Left: James Webb Space Telescope image of a water vapor plume emanating from Enceladus. Right: Illustration of the interaction of Enceladus and Saturn’s E-ring.

      Map of Enceladus based on imagery from Cassini, turning our view of Enceladus from a small point of light into a unique world with its own topography.
      Events in world history in 1789:
      January 29 – Vietnamese emperor Quang Trung defeats Chinese Qing forces at Ngọc Hồi-Đống Đa in one of the greatest military victories in Vietnamese history.
      March 10 – In Japan, the Menashi-Kunashir rebellion begins between the Ainu people and the Japanese.
      April 7 – Selim III succeeds Abdul Hamid I as Sultan of the Ottoman Empire.
      April 28 – Aboard the HMS Bounty in the Pacific Ocean, Fletcher Christian leads the mutiny against Captain William Bligh.
      April 30 – Inauguration of George Washington as the first President of the United States of America.
      July 14 – Citizens storm The Bastille fortress in Paris during the French Revolution.
      September 15 – Birth of American writer James Fenimore Cooper in Burlington, New Jersey.
      December 11 – Founding of the University of North Carolina, the oldest public university in the United States.
      Explore More
      11 min read 15 Years Ago: STS-128 Delivers Cargo to Enable Six-Person Space Station Crew
      Article 1 day ago 10 min read 40 Years Ago: President Reagan Announces Teacher in Space Project
      Article 2 days ago 12 min read 55 Years Ago: Apollo 11 Astronauts End Quarantine, Feted from Coast to Coast
      Article 1 week ago View the full article
    • By NASA
      The Sturgeon Moon rises behind a replica Saturn V rocket at the U.S. Space & Rocket Center in Huntsville, Alabama on Monday, August 19, 2024. Over 99% full when it rose, the moon was a rare combination of a blue moon and a supermoon, a phenomenon that will not repeat until 2027. NASA/Michael DeMocker A super blue Moon rises over Huntsville, Alabama, home to NASA’s Marshall Space Flight Center and the U.S. Space and Rocket Center, Aug. 19. Visible through Wednesday, Aug. 21, the full Moon is both a supermoon and a Blue Moon. As the Moon reaches its closest approach to Earth, the Moon looks larger in the night sky with supermoons becoming the biggest and brightest full Moons of the year. While not blue in color, the third full Moon in a season with four full Moons is called a “Blue Moon.”
      Huntsville is known as the “Rocket City” because of its proximity to NASA Marshall, which manages vital propulsion systems and hardware, engineering technologies, cutting-edge science, and launch vehicles for Apollo, shuttle, and Artemis. (NASA/Michael DeMocker)
      Explore More
      3 min read NASA Marshall Names Roger Baird Associate Director
      Article 19 hours ago 17 min read The Marshall Star for August 14, 2024
      Article 7 days ago 3 min read NASA Challenge Seeks ‘Cooler’ Solutions for Deep Space Exploration
      Article 1 week ago View the full article
    • By USH
      Mount Kailash is a mountain in Ngari Prefecture, Tibet Autonomous Region of China. It lies in the Kailash Range of the Transhimalaya, in the western part of the Tibetan Plateau. The peak of Mount Kailash is located at an elevation of 6,638 m, near the trijunction between China, India and Nepal. 

      In Tibetan Buddhism, Mount Kailash holds a special place as the Axis Mundi, or the center of the universe. Imagine it as the heart of everything, where heaven and earth meet. This sacred mountain isn't just a random peak; it's like the cosmic hub, connecting different realms together. 
      In the year 1999, an expedition of Russian Scientists led by Dr Ernst Muldashev claimed that Mount Kailash is too perfectly shaped for a natural mountain. They have discovered that the top of Mt. Kailash is actually a man-made vacuum pyramid. It is surrounded by more than 100 other small pyramids. According to preliminary estimates, the direct height of the pyramid complex is between 100 and 1,800 meters, while the Egyptian pyramid is only 146 meters 
      It is also believed to be the site of Lord Shiva, the god of destruction and rebirth as well as where the first human beings were created. 
      According to the legend Shiva has left a giant footprint on the summit  of the mountain. Despite extensive searches, no concrete evidence of  this footprint has ever been found. 
      While exploring Mount Kailash on Google Earth, I spotted a large, unusual anomaly near the summit. It resembles two hands, each with  four visible fingers, positioned opposite each other and seemingly carved into the rock. 
      Could these huge hands be a kind of a 'footprint' of Shiva that people have been searching for? 


      As for climbing up the summit, some daring mountaineers have attempted to do so, but with no luck. It also is said that who climb Mount Kailash age quickly. The time that human takes to age two weeks only take 12 hours in the mountain. Numerous hikers have detailed that they feel like their nails and hairs are developing rapidly within 12 hours. 
      Trekking all the way up to the peak of Mount Kailash is held to be a forbidden act among Hindus for the fear of trespassing the sanctity of the mountain and disturbing the divine energies residing there. 
      Even planes don't fly over Kailash as Mount Kailash is said to possess a mysterious magnetic anomaly that disrupts navigational instruments and disrupts compass readings. This phenomenon has puzzled scientists with no concrete explanation offered to date. 
      Coordinates: 31° 4'4.83"N  81°18'24.47"E
      Mount Kailash is still a mystery. The unconquered peak remains wrapped in myths, legends, and spiritual tales.View the full article
  • Check out these Videos

×
×
  • Create New...