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What is a planet? Jean-Luc Margot wants a new definition
What is a planet? Under the 2006 definition for "planet," Pluto lost full planet status. Learn about a proposed new definition.
July 22, 2024
Neutron-star jet sprays like a garden sprinkler
Astronomers using the MeerKAT radio telescope in South Africa have observed a neutron-star jet with an S shape for the first time.
July 21, 2024
Comet 13P/Olbers will be closest to Earth today
Comet 13P/Olbers is making its closest approach to Earth today, July 20, 2024. Want to see it for yourself? Check out the finder maps here.
July 20, 2024
Does phosphine on Venus mean … life?
2 research teams say they found more signs of phosphine on Venus. They also announced a tentative detection of ammonia: another possible biosignature gas.
July 19, 2024
Evidence for intermediate-mass black hole in Omega Centauri
A new study finds strong evidence for an intermediate-mass black hole - an elusive type - in the Omega Centauri globular cluster.
July 18, 2024
1st lunar lava tube discovered by NASA moon orbiter
An international team of researchers said it has found the 1st evidence for an ancient lunar lava tube on the moon. It is located in Mare Tranquillitatis.
July 17, 2024
This desert moss could grow on Mars, no greenhouse needed
Scientists in China say a desert moss commonly found on Earth can survive the harsh conditions of Mars. Future astronauts could use it to grow other plants.
July 16, 2024
Astronomer Michael Brown: ‘I killed Pluto. Now I’m searching for Planet 9’
Cool astronomy livestream on Monday, July 14! EarthSky's Deborah Byrd will be talking with astronomer Michael Brown, who calls himself "the man who killed Pluto."
July 15, 2024
Eyeball ocean world? Webb reveals an intriguing super-Earth
NASA's Webb space telescope has revealed that exoplanet LHS 1140 b is a super-Earth ocean world. It may have an ocean on one side or a global ice-covered ocean.
July 15, 2024
Will the official definition of a planet change … again?
Astronomers will vote on a new definition of a planet in August 2024. The update would include exoplanets and set mass limits.
July 14, 2024
