The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

A world-leading designer of space robots says gigantic new rockets being tested by billionaires Elon Musk and Jeff Bezos are ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Experts told Newsweek about the difficulties of reaching Mars as the United States faces complex challenges in space policy.

Mars' southern hemisphere absorbs a lot of the sun's energy during the Red Planet's spring, and that may be causing Mars' ...

Buttes and mesas in Mars' Chryse Planitia contain clay minerals made from liquid water interacting with the rock nearly 4 ...

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"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was ...

Creation-Space launches accelerator to invest in young startups tailoring tech solutions toward a sustainable human presence ...

The Mars Express orbiter launched to the Red Planet. Twenty years later, ESA has delivered a high resolution color image of Mars along with a time-lapse of "webcam" images that were released in near ...

Californians watching the sky in February have the chance to view a parade of planets and a snow moon. The planetary alignment that began in January will continue into February, according to ...

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...