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Earth
Human World
January birthstone: the garnet
Garnets, the January birthstone, are often thought to be red gemstones. But they also come in yellow, green, orange, brown and black.
January 6, 2022
Tonight
Mercury’s greatest evening elongation January 7
Mercury's greatest evening elongation will come on January 7. That makes this week a great time to spot Mercury in the west after sunset.
January 5, 2022
Space
Updates on Webb: Final unfolding on Saturday
The James Webb Space Telescope will take about a month to unfurl as it travels to L2. Some are calling it Webb's "30 days of terror."
January 5, 2022
Earth
Earlier tsunami warnings via magnetic fields
Scientists analyzed tsunamis from 2009 and 2010. They showed the magnetic fields of these great waves can help create earlier tsunami warnings.
January 5, 2022
Space
The 1st known exoplanet magnetic field
An international team of astronomers has discovered a magnetic field on exoplanet HAT-P-11b, a Neptune-sized world 123 light-years away.
January 5, 2022
Today's Image
Crescent moon, crescent Venus
As Venus nears its passage between the Earth and sun on January 8-9, it appears in our sky as a very thin crescent. Photos and insights here.
January 5, 2022
Constellations
Canis Major and Sirius in the New Year
Canis Major the Greater Dog is most famous for being home to the brightest star in the sky, Sirius. You can see it in January following Orion from the horizon.
January 5, 2022
Constellations
See Eridanus the River in January
Why search for such a faint constellation? Only because it's beautiful. Plus seeing Eridanus can give you a kinship with stargazers from centuries ago.
January 4, 2022
Space
Ice on Earth-like worlds might be rare
Ice on Earth-like worlds orbiting other stars may be fairly rare at the planets' poles, according to a new study from researchers in the U.S. and Switzerland.
January 4, 2022
Tonight
Contemplate the apex of the sun’s way in January
Our sun, and its solar system, are moving in space in the general direction of a point in the sky called the solar apex. It's near the star Vega.
January 4, 2022
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