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Neptune: The Basics

The eighth planet from the Sun, Neptune was the first planet located through mathematical predictions rather than through regular observations of the sky. When Uranus didn't travel exactly as astronom ...
Hubble mosaic of the majestic Sombrero galaxy.
Hats Off to the Sombrero

This nearly edge-on view of the Sombrero galaxy shows that the disks of spiral galaxies are incredibly thin. The majestic spiral arms cannot be seen in this side view of the Sombrero, named because it ...

The Big Bang Model

The Big Bang Model is a broadly accepted theory for the origin and evolution of our universe. It postulates that 12 to 14 billion years ago, the portion of the universe we can see today was only a few ...

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