The How It Works Book of Space is your ultimate guide to our Solar System and beyond. Explore planets, moons, asteroids and more, plus discover what the exciting future of space exploration holds thanks to the new technological...
1) Black dwarf It takes 10 trillion years for a white dwarf to cool off entirely. Our galaxy isn’t even old enough for a black dwarf to physically exist yet, but it lies in our...
Planets are basically round because of the way that gravity works – if you imagine all of a planet’s mass concentrated at its core, then it’s pulling with equal force in every direction. Provided...
On this day in 2005, the discovery of the dwarf planet Eris was announced
Astrophysicist Eric Ford from Pennsylvania State University discusses our current understanding of planet origins
They might not be quite big enough to be classed as full-size planets, but how many are out there?
We asked space author Giles Sparrow for his expert explanation
Activate your warp drive and travel on past the jump now to find out
