Mars Is Pretty Clean. Her Job at NASA Is to Keep It That Way.
By KENNETH CHANG
Catharine A. Conley is not facing aliens, so her main job is to make sure not too many Earth spores from research missions to Mars are left behind.
Scientists say these dark, narrow, downhill streaks are evidence of flowing water on Mars.
Scientists looked at dark streaks that form each summer on the slopes of Martian mountains, craters and canyons.
Catharine A. Conley is not facing aliens, so her main job is to make sure not too many Earth spores from research missions to Mars are left behind.
In 1907, The Times published as front-page news an assertion by Prof. Percival Lowell that he had discovered intelligent life on Mars.
A rare astronomical phenomenon produced a moon that appeared slightly bigger than usual and had a reddish hue.
The combination of a supermoon and a lunar eclipse led to some striking photography, and some not-so-striking photography.
The moon will appear larger than usual and will take on a reddish hue in much of North America on Sunday night.
A new report supports the theory that two black holes in a galaxy 3.5 billion light-years away are headed for a cosmic collision of unimaginable scale.
An archivist has released thousands of never-before-seen images from NASA’s Apollo missions.
Since New Horizons beamed back photos of Pluto, the question has loomed: What’s next? More than 1,600 Times readers shared their ideas.
Dawn is mapping the dwarf planet Ceres, a Texas-size ball of ice and rock.
The Rosetta spacecraft is following Comet 67P/C-G as it makes its closest approach to the sun.
NASA’s New Horizons spacecraft is sending back images of Pluto from its summer flyby.
NASA explains why an animated image of the Moon crossing over the Earth wasn’t just someone being creative with Photoshop.
A selection of images from NASA’s Curiosity rover as it drives toward Mount Sharp.
NASA scientists said Monday that they had found evidence of liquid water on Mars.
A rare astronomical phenomenon produced a moon that appeared slightly bigger than usual and had a reddish hue.
Images showing what scientists say is definitive evidence of salty liquid water flowing on Mars.
Recent plans to colonize the red planet are excessively optimistic. It is a veritable hell for living things.
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