planet
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Science & Technology
What does opposition mean for an outer planet?
Artist’s concept of Saturn in opposition to the sun. Not to scale. Image via NASA. EarthSky’s 2026 lunar calendar shows…
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Science & Technology
Saturn-mass rogue planet revealed in unique new observations
View larger. | Artist’s concept of a rogue planet in the process of microlensing a more distant star. The gravity…
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Science & Technology
Astronomers measure the mass of a rogue planet drifting through the galaxy
A new study shows that astronomers have directly measured the mass and distance of a newly discovered free-floating planet by…
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Science & Technology
Dwarf planet Ceres discovered 225 years ago today
Dwarf planet Ceres’ Occator crater in false color showing surface composition. Image via NASA/ JPL-Caltech/ UCLA/ MPS/ DLR/ IDA. EarthSky’s…
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Science & Technology
Astronomers Spent Years Watching a Planet, Then It Vanished Without a Trace
Astronomers observing the starFomalhaut, located just 25 light-years from Earth, believed they had detected a planet, later named Fomalhaut b,…
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Science & Technology
Unexpected atmosphere on lava planet is an exciting surprise
View larger. | Artist’s concept of scorching hot TOI-561 b and its sunlike star. New observations by NASA’s James Webb…
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Science & Technology
A planet just vanished. NASA’s Hubble reveals a violent cosmic secret
Astronomers using NASA’s Hubble Space Telescope (HST) have witnessed the surprising aftermath of massive space rocks smashing into each other…
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Science & Technology
Scientists may have found the planet that made the Moon
Reconstructing Theia’s makeup: A new study in Science identifies the most likely chemical composition of Theia, the ancient planetary body…
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Science & Technology
Astronomers find a planet orbiting at a wild angle no one can explain
To study the moments when the planet crossed over starspots, researchers relied on the multicolor MuSCAT3 and MuSCAT4 instruments installed…
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Science & Technology
Subaru Telescope reveals a hidden giant planet
Astronomers working with the Subaru Telescope in Hawaiʻi have identified two remarkable objects circling distant stars: a giant planet and…
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