Was the moon a captured planet?

Unexplained observations suggest the Moon is alive.

The solar system is more geologically active than you might think.

Einstein's theory of general relativity was not always considered correct. It wasn't until Hubble made a grand discovery that the equation was fixed.... or was it? Some scientists believe the equation should actually go back to it's original form due to dark energy.

Jupiter’s red eye has been swirling for at least 350 years.

Luckily the Cassini spacecraft was there to witness one of these storms.

Dark energy is an unknown form of energy which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe.

Evidence suggests that the so called "habitable zone" changes as the Sun ages. Many years ago, Venus may have resembled Earth and been home to life.

Before heading into the solar system and beyond, get the latest weather conditions.

Volcanic activity on Io, one of Jupiter’s moons, could be the key to the planet’s extraordinary auroras. Here’s how scientists at Syracuse University in New York have recreated volcanic activity on Io.

Jupiter’s Great Red Spot – the largest and longest-running storm in our solar system – is shrinking. Juan Lora, a planetary scientist at UCLA, explains why.

By studying similar stars, scientists believe they can predict what will happen to our Sun over time. One prediction is that the sun will get brighter as it ages.

If another civilization built a giant energy collector, we could detect it.

Black Hole Collisions are the most powerful, violent events in the universe.

Evidence shows that the Andromeda Galaxy is headed straight for our own. In the next few billion years, the two will collide. The Solar System will most likely be okay though.

Instead of lava, freezing water is believed to burst from Wright Mons on Pluto.