Eruptions could have kept planet warm enough for liquid water to intermittently flow across its ancient surface, suggests a new study.
When Comet Siding Spring made its historic close approach with Mars last month, the icy interloper showered the Martian upper atmosphere with meteors -- and several robots were on hand to monitor the shower's effects. Continue reading â†’
The mineral, hematite, is formed when another mineral, magnetite, is exposed to Marsâ€™ atmosphere and water. Continue reading â†’
NASA's bold asteroid-capture mission is an expensive distraction that does little to advance the agency's overarching goal of getting humans to Mars, one prominent researcher argues.
A comet the size of a small mountain and about as solid as a pile of talcum powder whizzed past Mars.
The HiRISE camera on board NASA's Mars Reconnaissance Orbiter (MRO) has become the first instrument orbiting Mars to beam back images of comet Siding Spring's nucleus and coma. Continue reading â†’
As we await a close-up view of comet Siding Spring making its closest approach with Mars, astronomers on Earth have been busy doing some of their own comet spotting from afar. Continue reading â†’
Comet Siding Spring will make a heart-stopping close flyby of the Red Planet in Sunday, giving our Martian armada of robotic explorers a ring-side view of the spectacle. Continue reading â†’
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