The European Space Agency announced that astronomers have now discovered over 40,000 near-Earth asteroids. This illustration…
Category: Earth Sky
Before their big smashup, Theia and Earth were neighbors
View larger. | Theia and Earth collided about 4.5 billion years ago, as depicted in this…
OSIRIS-APEX mission to asteroid Apophis soars past Earth
NASA’s OSIRIS-APEX spacecraft captured this view of Earth as it soared some 2,100 miles (3,400 kilometers)…
Are water-carved caves on Mars hiding alien life?
View larger. | The 8 potential water-carved caves on Mars – called karst caves – are…
What if a small black hole devoured you?
View larger. | Artist’s concept of a black hole system containing a dormant black hole orbiting…
Colorful life on exoplanets might be lurking in clouds
View larger. | Artist’s concept of a rocky planet like Earth with colorful microbes in its…
These weird aurora blobs are rare proton auroras
View at EarthSky Community Photos. | These green aurora blobs in front of the more distant…
A fast-growing supermassive black hole in the early universe
The James Webb Space Telescope captured this image of galaxies floating through space. At top is…
Exoplanet atmospheres are a key to habitability
Artist’s concept of exoplanet GJ 9827 d. It might be a steam world, with lots of…
Lost sisters of the Pleiades are scattered across the sky
The Pleiades star cluster, a favorite of stargazers, is actually part of a group that has…