The largest object is the asteroid belt is the dwarf ... At 4.5 billion km from the Sun, it receives very little heat and so has an average temperature of just -200°C. While planets and asteroids ...

Our home, planet Earth, is part of a system of bodies that orbit a central star – the Sun. This solar system consists of four inner rocky planets and four outer gas giant planets as well as an ...

Now European Southern Observatory (ESO) thinks one of the objects floating along the main belt might be the smallest dwarf planet in our solar system — an asteroid known as Hygiea. Hygiea isn ...

Then, in 2006, Ceres was once again reclassified, this time as a dwarf planet — not quite a planet, but not quite an asteroid, either. Now Ceres had to share the spotlight with Pluto and the ...