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Reuters • Will Dunham

Perseverance detects buried ancient river delta in Jezero — some of the oldest evidence of flowing water on Mars

Using ground-penetrating radar in Jezero Crater, NASA's Perseverance rover has detected a buried ancient river delta that predates surface deposits seen from orbit. The discovery provides some of the oldest direct evidence that liquid water flowed on Mars billions of years ago and reveals deeper fluvial architecture for future sampling.

2026-03-18T15:09:26.934756-07:00

Space.com

Meir and Williams complete 7‑hour EVA to prep ISS for roll‑out solar arrays — NASA's first spacewalk in 10 months

2026-03-18T13:35:29.516201-07:00

Universe Today

NASA's SPARCS CubeSat returns first-light images, launches M‑dwarf habitability campaign

2026-03-18T12:40:41.290441-07:00

SpaceNews.com

NASA forced to choose which planetary missions to keep as program faces funding shortfall

2026-03-18T05:18:40.243901-07:00

News Timeline

Reuters

Perseverance detects buried ancient river delta in Jezero — some of the oldest evidence of flowing water on Mars Using ground-penetrating radar in Jezero Crater, NASA's Perseverance rover has detected a buried ancient river delta that predates surface deposits seen from orbit. The discovery provides some of the oldest direct evidence that liquid water flowed on Mars billions of years ago and reveals deeper fluvial architecture for future sampling.

2026-03-18T15:09:26.934756-07:00

Perseverance detects buried ancient river delta in Jezero — some of the oldest evidence of flowing water on Mars

Space.com

Meir and Williams complete 7‑hour EVA to prep ISS for roll‑out solar arrays — NASA's first spacewalk in 10 months NASA astronauts Jessica Meir and Chris Williams spent 7 hours 2 minutes on an EVA to ready power channel 2A for future roll‑out solar arrays on the International Space Station. The spacewalk — NASA's first in 10 months — begins a series of upgrades to increase station electrical capacity.

2026-03-18T13:35:29.516201-07:00

Meir and Williams complete 7‑hour EVA to prep ISS for roll‑out solar arrays — NASA's first spacewalk in 10 months

Universe Today

NASA's SPARCS CubeSat returns first-light images, launches M‑dwarf habitability campaign NASA's Star-Planet Activity Research CubeSat (SPARCS) has returned first-light images and begun an observing campaign targeting M‑dwarf stellar activity. The smallsat will chart ultraviolet output and energetic flares from the galaxy’s most common stars to inform assessments of exoplanet habitability.

2026-03-18T12:40:41.290441-07:00

NASA's SPARCS CubeSat returns first-light images, launches M‑dwarf habitability campaign

SpaceNews.com

NASA forced to choose which planetary missions to keep as program faces funding shortfall NASA’s planetary science program is confronting a budget shortfall that agency leaders say will require “strategic choices” about which missions to continue. The shortfall is driving a program-wide reprioritization as NASA evaluates ongoing and planned planetary projects against constrained funding.

2026-03-18T05:18:40.243901-07:00

NASA forced to choose which planetary missions to keep as program faces funding shortfall

Space.com

Rainfall, rivers and seas on Titan: what Earth analogues teach mission planners Despite extreme cold and a hydrocarbon chemistry, Titan hosts rainfall, rivers and seas that mirror Earth's hydrological processes. Researchers are using terrestrial analogues and Earth-based observations to interpret Titan's surface, reduce mission risk, and refine landing-site and payload requirements for future Saturn-system exploration.

2026-03-18T05:18:38.707088-07:00

Rainfall, rivers and seas on Titan: what Earth analogues teach mission planners

Space.com

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NASA delays ISS spacewalk after onboard medical evacuation; EVA now slated for ~8 a.m. EDT (1200 GMT) NASA postponed a planned International Space Station extravehicular activity following an in-orbit medical evacuation and now expects the spacewalk to begin at about 8 a.m. EDT (1200 GMT). Mission managers will provide live coverage while they revise timelines and confirm crew readiness for external work.

2026-03-17T21:07:20.621685-07:00

NASA delays ISS spacewalk after onboard medical evacuation; EVA now slated for ~8 a.m. EDT (1200 GMT)

NASA

NASA's X-59 preps second flight as low‑boom supersonic test campaign scales up for 2026 NASA’s Lockheed Martin‑built X‑59 low‑boom demonstrator is preparing for its second flight from Edwards AFB, a milestone that will pace an expanded flight‑test campaign through 2026. Early flights — including operations near 20,000 ft at roughly 260 mph — are gathering data on low‑boom signatures.

2026-03-17T14:09:33.847484-07:00

NASA's X-59 preps second flight as low‑boom supersonic test campaign scales up for 2026

SpaceNews.com

Tissue chips flown to model astronaut organ responses on the ISS Micro-scale tissue chips are being flown to the International Space Station to act as surrogates for human organs, enabling controlled study of cellular and tissue responses to microgravity and space radiation. Data will inform crew medical care and countermeasures for long-duration missions.

2026-03-17T04:12:24.080116-07:00

Tissue chips flown to model astronaut organ responses on the ISS

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NASA News

Perseverance detects buried ancient river delta in Jezero — some of the oldest evidence of flowing water on Mars

Meir and Williams complete 7‑hour EVA to prep ISS for roll‑out solar arrays — NASA's first spacewalk in 10 months

NASA's SPARCS CubeSat returns first-light images, launches M‑dwarf habitability campaign

NASA forced to choose which planetary missions to keep as program faces funding shortfall

News Timeline