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Physics-based Modeling and Tool Development for the Characterization and Uncertainty Quantification of Crater Formation and Ejecta Dynamics due to Plume-surface Interaction
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By Space Force
The 8th CTS, housed within Space Delta 8 - Satellite Communications, has been working diligently to develop and provide opportunities to enhance unit members’ understanding of how they fit into the bigger picture of space operations.
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By NASA
Mars: Perseverance (Mars 2020) Perseverance Home Mission Overview Rover Components Mars Rock Samples Where is Perseverance? Ingenuity Mars Helicopter Mission Updates Science Overview Objectives Instruments Highlights Exploration Goals News and Features Multimedia Perseverance Raw Images Images Videos Audio 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 2 min read
Margin’ up the Crater Rim!
NASA’s Mars rover Perseverance conducts proximity science on the Eremita Mesa abrasion patch in the Margin Unit on Sept. 6, 2024, as it continues its traverse up the rim of Jezero Crater. Perseverance acquired the image using its Front Left Hazard Avoidance Camera A (Hazcam) on sol 1261 — Martian day 1,261 of the Mars 2020 mission — at the local mean solar time of 13:53:53. NASA/JPL-Caltech To conclude its exploration of the mysterious margin unit before it ascends the rim of Jezero Crater, Perseverance made one last stop this past week to investigate these strange rocks at “Eremita Mesa.”
Since beginning its steep drive up the crater rim, Perseverance has been traversing along the edge of the margin unit (the margin of the margin!), an enigmatic unit rich in carbonates, a mineral group closely linked to habitability. Here, the rover team scouted out a mound of rock called “Specter Chasm,” where Perseverance cleared away the dusty, weathered surface with its trusty abrading bit. The resulting abraded patch, called Eremita Mesa, is pictured above being investigated by Perseverance’s proximity science instruments mounted on its robotic arm. This includes taking close-up images to examine the millimeter-scale particles that make up the rock, using the WATSON (Wide Angle Topographic Sensor for Operations and eNgineering) camera, which functions as Perseverance’s magnifying glass.
Before the rover began exploring, investigations using orbital satellite data had suggested the margin unit rocks may have formed in several different ways. Theories the team has been exploring include that the unit formed on the shoreline of the ancient lake that once filled Jezero Crater, or instead that it was produced by volcanic processes such as pyroclastic flows or ashfall, or ancient lavas flowing into the crater. Since Perseverance began its investigation of the unit in September 2023, more than 350 sols ago (1 sol = 1 Mars day), the Science Team has been scouring data collected by the rover’s instruments to help constrain the unit’s origin. So far, this has remained largely a mystery, with the original rock textures potentially heavily affected by alteration since it formed more than 3 billion years ago. Perseverance has already collected three exciting samples of this curious rock unit for future Earth return: “Pelican Point,” “Lefroy Bay,” and “Comet Geyser,” and the team is hoping the data collected at Eremita Mesa could help further constrain the ancient processes on Mars that formed these strange rocks.
Next, it’s onwards and upwards for Perseverance as it faces a steep climb up the crater rim, where perhaps even more exotic and exciting rocks await!
Written by Alex Jones, Ph.D. student at Imperial College London
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Last Updated Sep 10, 2024 Related Terms
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By Space Force
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By NASA
2 min read
Hubble Traces Star Formation in a Nearby Nebula
NASA, ESA, and L. C. Johnson (Northwestern University); Image Processing: Gladys Kober (NASA/Catholic University of America) NGC 261 blooms a brilliant ruby red against a myriad of stars in this new image from NASA’s Hubble Space Telescope. Discovered on Sept. 5, 1826 by Scottish astronomer James Dunlop, this nebula is located in one of the Milky Way’s closest galactic companions, the Small Magellanic Cloud (SMC). The ionized gas blazing from within this diffuse region marks NGC 261 as an emission nebula. It is home to numerous stars hot enough to irradiate surrounding hydrogen gas, causing the cloud to emit a pinkish-red glow.
This inset image shows the location of NGC 261 within the Small Magellanic Cloud. NASA, ESA, L. C. Johnson (Northwestern University), and ESO/VISTA VMC; Image Processing: Gladys Kober (NASA/Catholic University of America) Hubble turned its keen eye toward NGC 261 to investigate how efficiently stars form in molecular clouds, which are extremely dense and compact regions of gas and dust. These clouds often consist of large amounts of molecular hydrogen — cold areas where most stars form. However, measuring this raw fuel of star formation in stellar nurseries is a challenge because molecular hydrogen doesn’t radiate easily. Since it is difficult to detect, scientists instead trace other molecules present in the molecular clouds.
The SMC hosts a gas-rich environment of young stars along with trace amounts of carbon monoxide (CO), a chemical correlated with hydrogen and often used to identify the presence of such clouds. Using the Advanced Camera for Surveys (ACS) and Wide Field Camera 3 (WFC3), Hubble imaged these stars in the southwest portion of the SMC where NGC 261 resides. The combined power of ACS and WFC3 allowed scientists to closely examine the nebula’s star-forming properties through its CO content at optical and near-infrared wavelengths. This research helps astronomers better understand how stars form in our home galaxy and others in our galactic neighborhood.
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Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contact:
Claire Andreoli
NASA’s Goddard Space Flight Center, Greenbelt, MD
claire.andreoli@nasa.gov
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Last Updated Aug 28, 2024 Editor Michelle Belleville Location NASA Goddard Space Flight Center Related Terms
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