While our planet only has one easily visible Moon, several other tiny objects arguably deserve the title too

Crater Byrgius is located in a highland region roughly midway between dark-floored Grimaldi (222km) and Schickard (227km). Under high illumination, this 88km-diameter feature is best revealed by Byrgi

Earth exists in a bubble. Our atmosphere forms a protective barrier between everything on the planet’s surface and the near-empty vastness of space. But it’s not the only bubble Earth sits inside. Bey

First up is the mag. +11.9 planetary nebula IC 351, located 2.3° west and 0.8° south of Menkib (Xi (ξ) Persei). Despite its small apparent size – just 8 x 6 arcminutes – it’s visible through a small s

Might our universe – as vast as it is – be simply one of many? We look at the growing evidence that there’s more than one cosmos out there

It’s a source of some frustration that the last time we spotted a supernova in the Milky Way Galaxy – all the way back in 1604 – no one had a telescope to point at it. We have to content ourselves wit