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Saturn and Mars Team Up to Make Their Closest Approaches to Earth in 2018
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By USH
The Curiosity rover continues to capture fascinating anomalies on the Martian surface. In this instance, researcher Jean Ward has examined a particularly intriguing discovery: a disc-shaped object embedded in the side of a mound or hill.
The images were taken by the Curiosity rover’s Mast Camera (Mastcam) on April 30, 2025 (Sol 4526). To improve clarity, Ward meticulously removed the grid overlay from the photographs, enhancing the visibility of the object.
To provide better spatial context for the disc’s location, Ward assembled two of the images into a collage. In the composite, you can see the surrounding area including a ridge, and the small mound where the disc appears partially embedded, possibly near the entrance of an opening.
The next image offers the clearest view of the anomaly. Ward again removed the grid overlay and subtly enhanced the contrast to bring out finer details, as the original image appeared overly bright and washed out.
In the close-up, displayed at twice the original scale, the smooth arc of the disc is distinctly visible. Its texture seems unusual, resembling stone or a slab-like material, flat yet with a defined curvature.
Might this disc-like structure have been engineered as a gateway, part of a hidden entrance leading to an architectural complex embedded within the hillside, hinting at a long-forgotten subterranean stronghold once inhabited by an extraterrestrial civilization?
Links original NASA images: https://mars.nasa.gov/raw_images/1461337/ https://mars.nasa.gov/raw_images/1461336/https://mars.nasa.gov/raw_images/1461335/
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By NASA
NASA/Jonny Kim The Soyuz MS-26 spacecraft is pictured backing away from the International Space Station shortly after undocking on April 19, 2025. Three hours later, the spacecraft landed in Kazakhstan, returning astronaut Don Pettit and cosmonauts Alexey Ovchinin and Ivan Vagner to Earth.
While aboard the International Space Station, Pettit conducted hundreds of hours of scientific investigations, including research to enhance on-orbit metal 3D printing capabilities, advance water sanitization technologies, explore plant growth under varying water conditions, and investigate fire behavior in microgravity, all contributing to future space missions.
Image credit: NASA/Jonny Kim
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By European Space Agency
Image: The Ocean and Land Colour Instrument on Copernicus Sentinel-3 captured this image of Earth’s biggest iceberg, A23a, on 5 April 2025. View the full article
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By NASA
1 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
On April 16, 2025, the Earth Science Division at NASA’s Ames Research Center in Silicon Valley held an Earth Science Showcase to share its work with the center and their families. As part of this event, kids were invited to share something they like about the Earth. These are their masterpieces.
Sora U. Age 9. “Wildlife”
Sora U. Age 9. “Wildlife” Wesley P. Age 2.5. “Pale Blue”
Wesley P. Age 2.5. “Pale Blue” Kira U. Age 5. “Hawaii”
Kira U. Age 5. “Hawaii” Anonymous. “eARTh”
Anonymous. “eARTh” Brooks P. Age 8mo. “Squiggles”
Brooks P. Age 8mo. “Squiggles” About the Author
Milan Loiacono
Science Communication SpecialistMilan Loiacono is a science communication specialist for the Earth Science Division at NASA Ames Research Center.
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Last Updated Apr 25, 2025 Related Terms
Earth Science Ames Research Center Ames Research Center's Science Directorate Earth Science Division Keep Exploring Discover More Topics From NASA
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By NASA
The New York Stock Exchange welcomed team members from NASA’s SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer) mission to celebrate the launch of the agency’s newest astrophysics observatory to understand the origins and structure of the universe. Image courtesy of NYSE Group Members of NASA’s recently launched SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer) mission team participated in the New York Stock Exchange’s closing bell ceremony in New York City on April 22.
Michael Thelen, SPHEREx flight system manager at NASA’s Jet Propulsion Laboratory in Southern California, is seen here ringing the closing bell. Additional SPHEREx team members from NASA JPL, which manages the mission, and BAE Systems Inc., Space & Mission Systems, which built the telescope and spacecraft bus for NASA, participated.
The SPHEREx observatory, which launched March 11 from Vandenberg Space Force Base in California on a SpaceX Falcon 9 rocket, will soon begin mapping the universe like none before it. Using 102 color filters to scan the entire sky quickly, SPHEREx will gather data on hundreds of millions of galaxies that will complement the work of more targeted telescopes, like NASA’s Hubble and James Webb space telescopes. Its surveys will help answer some of the biggest questions in astrophysics: what happened in the first second after the big bang, how galaxies form and evolve, and the origins and abundance of water and other key ingredients for life in our galaxy.
Michael P. Thelen, SPHEREx Observatory Flight System Manager, rings the bell alongside NASA SPHEREx team members at the New York Stock Exchange Tuesday, April 25, 2025. Image courtesy of NYSE Group More About SPHEREx
SPHEREx is managed by JPL for NASA’s Astrophysics Division within the Science Mission Directorate in Washington. BAE Systems (formerly Ball Aerospace) built the telescope and the spacecraft bus. The science analysis of the SPHEREx data will be conducted by a team of scientists located at 10 institutions across the U.S. and in South Korea. Data will be processed and archived at IPAC at Caltech, which manages JPL for NASA. The mission principal investigator is based at Caltech with a joint JPL appointment. The SPHEREx dataset will be publicly available.
For more information on SPHEREx, visit:
https://www.nasa.gov/spherex
News Media Contacts
Alise Fisher
NASA Headquarters, Washington
202-358-2546
alise.m.fisher@nasa.gov
Calla Cofield
Jet Propulsion Laboratory, Pasadena, Calif.
626-808-2469
calla.e.cofield@jpl.nasa.gov
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