It all changed with the invention of the telescope ...

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Space is not empty. From our neighbouring planets in the Solar System to distant galaxies, there is a lot to see above us. Where did the Earth come from? How old is the universe? We look to the skies for the answers to these and other questions.

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Most planets have several moons, and many of these moons have fascinating characteristics.

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Learn about the many pieces that make up our solar system in this Sky Science backgrounder

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Did Pluto get replaced? Is there a new object in space that is much bigger than Pluto!

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NASA has launched a web-based visualization tool for anyone to explore the solar system in 3D.

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New definition of 'planet' sets Pluto in a new scene.

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