Stories by Caleb A. Scharf

A telescopic survey looking for trans-Neptunian objects has chanced across a 37 mile wide chunk of rock and ice that instead moves around the sun in the same orbit as Uranus, just further ahead of the planet.

This week a major geochemistry conference heard an argument for life on Earth having originated on Mars, but does this hold up to scrutiny?

Sometimes a picture really is worth a thousand words, or in this case 1,400 pictures are worth a few words. Here is the collage of images uploaded by people across the planet for NASA’s Cassini ‘Wave at Saturn’ event on July 19th 2013, while Cassini snapped Earth in turn, as a teeny, tiny dot of [...]

                      There may be something funny going on with the stuff covering the Moon, and a new NASA mission launching next month is aiming to solve the mystery.

                          The Andromeda galaxy holds a particular fascination.

Although NASA’s planet hunting mission Kepler seems unlikely to return to a fully functioning state, after another reaction wheel failure, it has already yielded an extraordinary crop of new worlds.

Back in February these pages discussed a newly discovered long-period comet, ISON (otherwise known as C/2012 s1), that is falling sunwards for what is probably its first passage through the inner solar system later this year – on a beautiful near parabolic orbit.

A comparison of the speediest spacecraft