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 ...

A giant sequoia located in Sequoia National Park in California, the General Sherman is 52,500 feet in volume and is more than ...

A new study indicates that Mercury's core-mantle boundary (CMB) may possess a diamond layer that extends up to 18 kilometers ...

The crescent moon will be the centerpiece of April's final astronomical event as it bunches up with Venus, Saturn and Mercury ...

Venus will be at its brightest in the morning sky — just 67 days after it was at its brightest in the evening sky. Here's why ...

The Trump administration's Environmental Protection Agency has exempted 47 power companies from regulations to curb mercury and air toxics for 66 coal-fired power plants for two years.