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Astronomy Essentials
Tonight
Visible planets and night sky guide for May
Visible planets and night sky guide for May 2024. Today, Jupiter is on the opposite side of the sun from Earth. But we can see it thanks to the SOHO spacecraft.
May 18, 2024
Earth
Crepuscular rays are sunrays in twilight skies
Crepuscular rays form around twilight when particles in the atmosphere reflect the sun's light beams toward our eyes. See photos of the phenomenon here.
May 18, 2024
Tonight
Lineup of 6 planets soon to grace our morning skies
There's a lineup of 6 planets in the morning sky in early June. But four of them aren't easy to see. Find charts and observing tips here.
May 17, 2024
Earth
Giant hummingbirds with backpacks help discover a species
Giant hummingbirds with tiny backpacks helped discover a new species of hummingbird, as they were tracked up high in the Andes.
May 17, 2024
Tonight
The famous Northern Crown is home to a future nova
Corona Borealis, the Northern Crown, is an almost-perfect semicircle of stars. In the northern summer of 2024, it might be home to a nova, or "new" star.
May 17, 2024
Human World
Is AI to blame for our failure to find alien civilizations?
Is AI - artificial intelligence - the great filter that alien civilizations are unable to evolve beyond? The threat of AI and our own self-destruction, here.
May 16, 2024
Earth
Human World
Sun
Auroras on May 10-11 wowed millions! Pics here
Auroras last night from "extreme" geomagnetic storming - which came after a week of very high activity on the sun - wowed millions around the globe.
May 16, 2024
Constellations
Centaurus the Centaur contains nearby stars
Centaurus the Centaur is a constellation found in Southern Hemisphere skies that contains some of the closest stars to our sun. Read more here.
May 16, 2024
Space
Astronomers find 60 Dyson sphere candidates, among millions of searched stars
Two teams of astronomers in Europe say they have found 60 Dyson sphere candidates. Are they alien megastructures or a previously unknown natural phenomenon?
May 15, 2024
Earth
Canadian zombie fires reigniting, sending smoke to US
The Canadian zombie fires simmering below ground all winter are reigniting with spring. Some raging fires are sending smoke southward into the US.
May 15, 2024
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