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Astronomy Essentials
Tonight
Visible planets and night sky guide for August
Visible planets and night sky guide. Deborah Byrd explains what makes Black Moons special. And see this week's planetary parade in a video gallery.
August 23, 2025
Astronomy Essentials
Zodiacal light: Start watching for it now
The zodiacal light is an eerie light extending up from the horizon before dawn around the Northern Hemisphere autumn. Southern Hemisphere? Look after sunset!
Today's Image
Morning planets parade, plus the moon and stars!
Have you seen the morning planets parade? The moon joined forces with Venus and Jupiter to put on a great show. Mercury, Uranus and Neptune were there too!
August 22, 2025
Space
An atmosphere on TRAPPIST-1 d? New observations say maybe
Is there an atmosphere on TRAPPIST-1 d? New observations from Webb suggest that if there is, it might be more like Mars or Venus. Or it might not exist at all.
August 22, 2025
Space
Could Ceres have been habitable? New research holds a clue
Could Ceres have been habitable? New research indicates it might have had the energy necessary to support some microbial metabolisms.
August 22, 2025
Space
5 bright comets approaching Earth. Charts here!
There are 5 bright comets heading toward Earth. The one that will arrive first, Comet Lemmon, might be visible with the unaided eye. Charts here.
August 21, 2025
Space
New moon discovered orbiting inside distant Uranus’ rings
Astronomers have discovered a new moon orbiting Uranus. The newly found moon - the planet's 29th - is just 6 miles wide.
August 21, 2025
Space
Rare quadruple star system could unlock brown dwarf mystery
A quadruple star system consisting of 2 red dwarfs and 2 brown dwarfs offers insight in the mystery of brown dwarfs, also known as failed stars.
August 21, 2025
Earth
Iberian Peninsula wildfires bring smoky skies to Europe
See a satellite view from space showing the Iberian Peninsula wildfires and the smoke that is degrading air quality in the region.
August 21, 2025
Tonight
The return of Sirius in the morning signals seasonal change
A sign of the changing season is the return of Sirius before sunup. Want to make sure you've spotted Sirius? The 3 stars in Orion's Belt point to it.
August 21, 2025
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