Forty-three years ago, in March 1982, humanity received its last direct visual postcard from the surface of Venus.

Mercury is tiny, barely bigger than the Moon. Its metallic core makes up 70% of the planet’s mass, vastly exceeding Earth’s ...

October's longer nights bring two transits of Titan across Saturn, while Io and Europa tango together across Jupiter three ...

We could be overlooking an entire population of asteroids that pose a threat to Earth on the very simple basis that they're ...

It’s especially puzzling since Venus is a terrestrial world much like Earth, so much so that it’s considered to be our planet ...