Mercury takes only 88 Earth days to orbit the sun.

Five of the brightest planets Mercury, Venus, Mars, Jupiter, and Saturn, can be seen even from urban areas with mild ...

Uranus has the craziest tilt in your Solar System. Its tilt is about ninety-eight degrees. That means its north pole is ...

Moments in human history are etched into the Earth. Now researchers are piecing together evidence of our impact on the planet ...

A planet that may support alien life has been discovered less than 20 light-years from Earth. The "promising" super-Earth - called HD 20794 d - may house water, according to the international research ...

February brings a rare planetary parade, with five bright planets in clear view and a special alignment of Mercury and Saturn ...

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

On Mercury, the hot days are also incredibly long. Because Mercury rotates so slowly — once every 58 Earth days — in some places, the sun can appear overhead for weeks at a time. A year on ...

To get somewhere in outer space, you can’t exactly drive in a straight line. Orbits are tricky things, and sending a probe to ...

Despite Mercury being about 39% as far from the sun as Earth is, its surface temperature can range from -290 degrees Fahrenheit (-180 degrees Celsius) at night to 800 degrees Fahrenheit (430 ...

Look up this week for February’s full snow moon and to catch the last glimpse of a visible parade of planets in the night sky before they fade from view.

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.