NASA celebrates Edwin Hubble's discovery of a new universe

For humans, the most important star in the universe is our sun. The second-most important star is nestled inside the Andromeda galaxy. Don't go looking for it—the flickering star is 2.2 million light-years away, and is ...

Space itself may have created galaxies

According to new research, the earliest seeds of structures may have been laid down by gravitational waves sloshing around in the infant universe.

There's more than just gravity at work in the solar system

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's responsible for the orbits of the planets and their satellites, but there are other forces that ...

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