Space Exploration & Science Missions   NASA  
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 Exploration & Science Missions   Human Spaceflight & Space Stations   NASA  
Space.com • Robert Z Pearlman

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

By Space.com: Jessica Meir and Chris Williams spent 7 hours and 2 minutes on EVA today (March 18).

2026-03-18T13:35:29.516201-07:00
Satellite   Commercial Space  
Via Satellite • Rachel Jewett

Satellogic Reveals Merlin Constellation for Daily Global 1‑m Earth‑Observation Mapping

By Via Satellite: Satellogic detailed plans for its next-generation ‘Merlin’ satellites, designed to provide one-meter resolution. The company said that Merlin will be differentiated by its ability to provide daily mapping of the entire planet, with one-meter spatial resolution.

2026-03-18T13:20:00.955353-07:00
Satellite   LEO   Space Exploration & Science Missions   NASA  
Universe Today • Matthew Williams

NASA’s SPARCS CubeSat Returns First-Light Images, Begins M-dwarf Exoplanet Habitability Campaign

By Universe Today: With the first images from the spacecraft now in hand, the team behind NASA’s Star-Planet Activity Research CubeSat (SPARCS) is ready to begin charting the energetic lives of the galaxy’s most common stars to help answer one of humanity’s most profound questions: Which distant worlds beyond our solar system might be habitable?.

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