Updated measurements from NASA’s Juno spacecraft could help researchers better understand the planet's mysterious interior, ...

Twin siblings, twin peaks, twin cities, twin planets... Two earths, one solar system. How would that work?

The curious minds at What If imagine a second Earth hiding in our solar system, exploring how it could exist and its effects ...

A strong solar flare peaked just after 9 a.m. Tuesday. What does that mean?

Auroras are not just on Earth. NASA has detected glowing northern and southern lights on Jupiter, Saturn, Mars and other ...

Close-up observations of the Sun explain how solar flares start, grow, and send high-energy particles racing through space.

Ancient Scottish rocks prove Earth had seasons and climate cycles even during Snowball Earth period despite near total ...

Fired from a vast sunspot, the "coronal mass ejection" is expected to reach Earth on either Thursday or Friday this week.

Using data collected by NASA's Parker Solar Probe during its closest approach to the sun, a University of Arizona-led ...

When a solar storm strikes Earth, it can disrupt technology that's vital for our daily lives. Solar storms occur when ...

Astronomers have announced the discovery of what appears to be an "ice cold Earth," a chilly but potentially habitable rocky ...

Jupiter is the largest planet in our Solar System and the fifth planet from the Sun. It is a massive gas giant made mostly of hydrogen and helium, the same elements that form stars.