EARTH

During the early years of the solar system, Mars got a little break from constant bombardment by space objects before the asteroids started up again.

NASA has an entire fleet of satellites orbiting Earth as we speak, and the way they move around the planet is hypnotizing.

Not all exoplanets are created equal — some are much more likely to be harboring alien life.

This year's Earth Day marks the 47th official celebration of the planet.

Meet Steve, the purple streak of light that appears during the aurora borealis and, until recently, stumped astronomers.

Framed by the icy rings of Saturn, these photos from NASA show Earth and the Moon in a whole new way.

Earth Day on April 22 also marks the anniversary of the start of the modern environmental movement in 1970.

When we finally find aliens living on an Earth-like planet outside our solar system, it might be swimming — because habitable exoplanets are probably completely covered in ocean.

If you’re looking at the night sky for the large asteroid that is passing close to Earth, look for something shaped like a peanut. Find out when you can view JO25 as it heads toward Earth.

According to NASA, the asteroid will fly by Earth Wednesday but we aren't in any danger because of it.

A new planet scientists found orbiting a small star is being called a “super-Jupiter” because it’s almost three times bigger than the largest planet in our solar system.

Google Earth now has a feature called Voyager that provides users with an interactive guided tour.

A NASA astronaut bound for the International Space Station was brutally honest and admitted that he is terrified about using the toilet in a weightless orbit around Earth.

If we are going to find aliens in our solar system, we might have a better shot exploring moons rather than other planets.

From within the Earth, rather than on its surface, an earthquake looks and sounds different.

Everyone is looking at Mars, but these two countries have their eyes on its biggest moon, Phobos, and hope to solve a cosmic mystery.

Soon we’ll have images of nighttime Earth’s illuminated surface almost instantly, thanks to NASA.

Earth’s sole natural satellite had a magnetic field once, but it disappeared about three billion years ago.

The asteroid impact at the time the dinosaurs went extinct hit Earth hard enough to cause earthquakes in Colorado.

Streams of the Sun’s garbage do beautiful things like create auroras, but they can also change the electricity in Earth’s atmosphere.

Life formed in oceans that were more acidic than they are today, and that gives us insight into how climate change will affect the Earth’s marine habitats.