The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Mars, Venus, Jupiter, Mercury and Saturn should be visible to the naked eye. You'll need a high-powered viewing device like a ...

But what’s it like on other planets? There are eight planets in our solar system ... The largest object is the asteroid belt is the dwarf planet Ceres, which is 950km in diameter (that's ...

The building blocks of life could have been delivered to Ceres by one or more space rocks from the outer asteroid belt.

White dwarf stars could host habitable planets. Fast planetary rotation reduces cloud cover, keeping surface temperatures stable.