comet

Comet C/2025 A6 (Lemmon), a long-period object discovered on January 3, 2025, by the Mount Lemmon Survey in…

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have detected doubly deuterated water (D2O), or ‘heavy water,’ in…

It was early January 2025 when a faint light spot was observed at the Mt. Lemmon Observatory in…

Comet 3I/Atlas continues to be full of surprises. As well as being only the third interstellar object ever…

You may be familiar with the famous “Wow!” signal. If you’re not familiar with the story, back in…

Featured in this image from the NASA/ESA Hubble Space Telescope is a lenticular galaxy called NGC 4753 with…

The mysterious comet 3I/ATLAS appears to be extremely large, making it orders of magnitude more massive than two…

Tektites are nearly pure glasses (practically no crystalline inclusions) created when a space rock slams into Earth, melting…

After 1I/ʻOumuamua and 2I/Borisov, 3I/ATLAS is the third object and the second comet from outside the Solar System…

Topline After a quiet 2025 for comets, skywatchers may soon get a very special naked-eye spectacle in the…

Scientists have discovered that a mysterious object hurtling through space from beyond the solar system is emitting its…

Credit: ZME Science/Midjorney. In 2024, scientists studying ancient sediments in the eastern United States reported signs of a…

Comet Lemmon (C/2025 A6) makes closest approach to Earth on October 21