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Staring at the sun—a close (but safe) look at our home star Staring at the sun ... Free learning activities and videos about the solar system Free learning activities and videos about the ...

The discovery is keeping astronomers on their toes about how planets are formed.

This process also shaped Jupiter and Saturn in our solar system. The HR 8799 system is just 30 million years old. Its young planets still radiate heat from their formation. This makes them ideal ...

The exact shape of the Oort cloud and how it is affected by forces beyond our solar system have, so far, remained mysterious. Now, researchers have developed a new model that suggests the inner ...