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View larger. | NASA’s Cassini spacecraft captured this view of Saturn’s largest moon, Titan, with Saturn’s 2nd-largest moon, Rhea, passing in front of it, on June 16, 2011. A new

View larger. | This artist’s illustration shows the possible surface of TRAPPIST-1 f, one of the 7 planets in the TRAPPIST-1 system. A new study suggested they could have varying

Artist’s concept of a planet far from its home star. A new study said that wide-orbit planets could be a natural result of chaotic early solar system formation. Such planets

View larger. | Dark and lighter-colored streaks on a crater rim on Mars. They’ve tantalized researchers for decades with the idea they might be related to liquid water. Now a

EarthSky’s Will Triggs talks about the odd sphere in space. Video via EarthSky. Science matters. Wonder matters. You matter. Join our 2025 Donation Campaign today. Spherical objects are common in

View larger. | Artist’s depiction of laser signals from a star reaching Earth. The search for such signals is called optical SETI or LaserSETI. A recent search has found 2

Artist’s concept of a Dyson sphere. Dyson spheres are structures that would form rings or hollow spheres around stars and harness their energy. However, they would be unstable around a

View at EarthSky Community Photos. | Prashant Naik was at Joshua Tree National Park in California, when he captured this photo of 2 Perseid meteors and the Milky Way on

These are the orbits of 96 minor planets and extreme trans-Neptunian objects around the sun. On May 21, 2025, the Minor Planet Center announced a new minor planet in orbit

The Atacama Large Millimeter/submillimeter Array (ALMA) took this image showing the molecular gas content of a pair of galaxies involved in a cosmic collision. The galaxy on the right hosts