Look to the eastern sky late Thursday, and a clear horizon will show you this unusual, grinning planet alignment.

The morning of April 24 will give rise to a striking mini-planetary parade, as Mercury, Venus, Saturn, Neptune, and Earth's ...

Get ready to put a smile on your face and have the sky smile back when the planets align over New York City this week. Venus, ...

The world's most famous telescope is celebrating in style with new views of Mars, nebulas and a galaxy that reminds us of home.

The Hubble Space Telescope launched on April 24, 1990, aboard the Space Shuttle Discovery (STS-31), and deployed into Earth ...

Is mercury pollution a real threat to penguins? Here's what scientists have discovered and what mercury is doing to these ...