Not all close encounters between Earth and Mars are equal, however. Few planets in any solar system orbit their suns in a perfect circle.

In the 1960s, humans set out to discover what the red planet has to teach us. Now, NASA is hoping to land the first humans on ...

Look up to the stars tonight to see Mars, as our neighboring planet’s orbit is at its closest point to Earth. Mars will be about 38.6 million miles away, according to NASA, the closest it will ...

The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, ...

It's also worth noting that the Red Planet's elliptical orbit means that it will actually get very slightly (about one percent) nearer to Earth on July 31, four days after opposition.

Getting rovers to Mars was one of NASA's crowning achievements, but now the space agency is looking for different ways to get samples back to Earth.

Astronomers have confirmed the existence of a new trojan asteroid in the orbit of Mars. This new companion of the Red Planet precedes Mars in its orbit, but unlike other trojan asteroids, this one ...

Commemorating the anniversary of its first-ever planetary mission, the European Space Agency has released a time-lapse video that shows the moon orbiting Earth from a remarkable vantage point ...

Richard Branson’s Virgin Orbit, a sister company to the space tourism-focused Virgin Galactic, has announced today it intends to launch an ambitious mission to Mars as soon as three years from ...