Video sweep across Mars’ Marathon Valley

A panoramic view from the Mars rover Opportunity. Wow! This video will take you to another world ...

Largest planet yet orbiting 2 suns

Imagine seeing 2 suns in your sky. Like the fictional planet Tatooine in Star Wars, some planets do orbit 2 stars. Kepler-164 is the largest yet discovered.

One robot spacecraft spies another

See the Mars rover Curiosity, nestled on Mars' surface? The sharp-eyed HiRISE camera aboard the Mars Reconnaissance Orbiter caught the view from space.

Liquid water ocean under Pluto ice?

“That you could have vast liquid water ocean habitats so far from the sun on Pluto - and on other Kuiper belt objects as well - is absolutely incredible.”

Astronomers find a baby planet

Planet K2-33b resides in a solar system in the process of being born. In human terms, if Earth were 45 years old, this planet would be just a few weeks old.

Exoplanets’ water hidden by clouds?

Hot Jupiters have masses like our Jupiter, but orbit their stars closely. They often have cloud or haze layers, which, a new study says, may hide atmospheric water.

Success! Mystery star to be monitored

Astronomers have raised $100,000 via Kickstarter to observe KIC 8462852, or Tabby’s Star, sometimes called the most mysterious star in the universe.

Earth has a new quasi-satellite

Asteroid 2016 HO3 is Earth's nearby companion in space. It's not a second moon, but it has an orbit so similar to ours that it'll remain nearby for hundreds of years.

Why your GPS twinkles

Radio signals twinkle much as stars do. This can have an effect on your GPS.

Measuring time in deep space

A scientist developing the Deep Space Atomic clock on why it’s key for future space missions.

Matching Donation Campaign

Exciting news! EarthSky received a $50,000 gift, with a request that it be used to collect matching funds. Please help us meet this match by donating to EarthSky today!

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