Explained: Near-miss asteroids
What to do in the event of an asteroid streaking toward Earth? Activate the asteroid ‘fire drill.’
Researchers find evidence of ice content at the moon’s south pole
Scientists map Shackleton crater, whose unusually bright floor may hint at the presence of ice.
Researchers calculate size of particles in Martian clouds of CO2 snow
Mars’ carbon dioxide ‘snowflakes’ are about the size of red blood cells.
