From Mars, Earth transits the Sun four times in a 284-year cycle. The transits occur in either May or November at intervals of 100.5, 79, 25.5, and 79 years. During these events, Earth and the Moon ...

Blue sunsets, whirling dust devils, giant volcanoes, tiny moons, and marsquakes—there’s a lot to discover on Mars!

Research shows Mars' gravitational pull affects Earth's deep-sea currents and climate, causing warming cycles every 2.4 million years.

A researcher says he found a possible shortcut to Mars that would halve the time it takes to travel to the planet and back to ...