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Many astronomers think Pa 30, a nebula in Cassiopeia (above), is the remnant of supernova 1181. A merger of 2 white dwarf stars created the supernova and resulting remnant. This

NASA has confirmed 6,000 exoplanets! NASA published a longer version of this story on September 17, 2025. Edits by EarthSky. 6,000 exoplanets! NASA announced on September 17, 2025, that its

View larger. | NASA’s Curiosity rover found these pure sulfur crystals on May 30, 2024, after it drove over and broke open a rock. Now, a new study from researchers

Image from the Very Large Telescope (VLT) in Chile showing the growth of baby planet AB Aurigae b (bright spot near the bottom) in its protoplanetary disk. Image via T.

The tiny asteroid 2025 RJ2 will pass close to Earth on September 15 and even closer to the moon on September 16, 2025. It poses no threat to us or

Comet SWAN25B, not yet confirmed, is a new comet discovery that is already shining bright, though it is close to the sun. Image via E. Guido/ M. Rocchetto/ J. Ferguson/

Artist’s concept of a black hole star. At center is a black hole with surrounding accretion disk. The larger envelope of turbulent gas makes it a black hole star. A

View larger. | Artist’s concept of exoplanet TRAPPIST-1e (lower right), with 3 more of the 7 planets nearby. The 1st results from observations by the James Webb Space Telescope show

This is the Mars rock Cheyava Falls in the Jezero Crater area of the red planet. The Perseverance rover drilled the hole we see here, extracting a sample called Sapphire

Scientists have detected an incredibly powerful burst of gamma radiation that repeated several times over a single day … and they can’t quite explain it. EarthSky’s Will Triggs has the story