Image number 100,000, which was captured on Oct. 7, "shows mesas and dunes within Syrtis Major, a region about 50 miles (80 ...

NASA still hasn't heard from its MAVEN Mars orbiter, and the spacecraft appears to be spinning in an odd way as well.

Illustration of the planet Mars covered in water in the past, when its atmosphere was thicker and warmer. Now scientists may have found an unground reservoir. Is there water on Mars? Scientists using ...

For the first time, scientists have mapped vast, continent-scale river drainage systems on Mars — ancient networks that may ...

Eight "skylights" may be entrances to underground spaces where evidence of ancient microbial organisms could be found.

NIST physicists report that clocks on Mars tick 477 microseconds faster per day due to weaker gravity and orbital effects.

On Jan. 15, Mars will reach a point in its orbit that astronomers call opposition. That evening, Mars will lie opposite the Sun from our perspective. It will rise at sunset, reach its highest point at ...

A newly discovered impact craters on Mars, captured in striking detail by NASA’s Mars Reconnaissance Orbiter. The image, ...

Mars is the 4th planet from the Sun and the one that has most intrigued humanity over the years. It was named after the god of war because its reddish soil gives the planet a scarlet hue in the night ...

In this episode, Dave Eicher invites you to observe the nearly full Moon as it passes Mars on the evening of December 17. Both objects closely follow the Sun’s apparent path through the stars, called ...

A team of researchers with a variety of backgrounds and affiliated with multiple institutions in the U.S. has taken a realistic approach to looking at the question of whether Mars could be terraformed ...

On the evening of Jan. 13, there will be a very special kind of eclipse of the planet Mars by the Moon. This type of eclipse is called an occultation, which occurs when the Moon or other celestial ...