360 video: Tour a Mars robot test lab

If your browser or smart phone is set up to view it, this 360 video will let you virtually explore a Mars simulation facility at NASA's Jet Propulsion Laboratory, where engineers are practicing for an upcoming Mars lander mission.

Nature likes to make bow waves

Boats moving through water make bow waves. Objects in space, including Earth, make them, too. Even the moon's shadow - penetrating Earth's atmosphere during a total solar eclipse - creates moving bow waves.

Measuring universe expansion reveals mystery

Is something unpredicted going on in the depths of space?

Update on S2, the star plunging past the Milky Way’s black hole

Astronomers report no companion found for S2, the star orbiting near our Milky Way's central black hole. It's an "all-clear” for an exciting test of Einstein’s Theory of General Relativity.

Day meets night on Jupiter

The Juno spacecraft captured this image during its 11th close flyby of the planet. It shows swirling cloud formations around Jupiter's south pole.

Send your name to the sun

NASA's Parker Solar Probe, launching this summer, will travel closer to the sun than any spacecraft yet - and you can send your name along for the ride. Hear about it from William Shatner.

See asteroid 2017 VR12 as it swept past

Asteroid 2017 VR12 passed at 3.76 times the moon's distance on March 7. Here are images and video of its sweep past Earth.

Views of home

Intriguing and inspiring perspectives of our home planet from spacecraft cameras looking back at Earth.

A signal from the 1st stars

It’s potentially one of the most exciting astronomical discoveries of the decade. Astronomers have detected a signal from the 1st stars to form in the universe.

This asteroid will pass closer than the moon on Friday

And you can watch the passage of near-Earth asteroid 2018 DV1, live, on March 2.

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!

Would you consider

donating?

If you've already donated, we apologize for the popup and greatly appreciate your support.