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Posts by
Editors of EarthSky
What’s a safe distance from a supernova for Earth?
What's a safe distance from a supernova? To survive a supernova, recent data says Earth would have to be at least 160 light-years away from the exploding star.
May 26, 2023
The world’s fastest bird is the Peregrine falcon
When in its hunting dive, the Peregrine falcon is the fastest bird - in fact, the fastest animal - on Earth. Get a bird's-eye view of the flight in this video.
April 30, 2023
Aurora photos, night of April 23-24, 2023
The night of April 23-24, 2023, featured a wonderful auroral display. Aurora photos from our community, and some tweets, here.
April 25, 2023
Hybrid solar eclipse photos: April 20, 2023
Enjoy these April 20, 2023, hybrid solar eclipse photos from the EarthSky community. Do you have a photo? Share it with us!
April 20, 2023
What are brown dwarfs?
Brown dwarfs are more massive than a planet, but less massive than a star. They can be found orbiting stars, or traveling around in the galaxy on their own.
April 20, 2023
Here’s why rainbows have a curved or arcing shape
Rainbows have a curved shape because they're made from light reflected after hitting spherical raindrops. Learn more about rainbows here.
March 29, 2023
Was ‘Oumuamua a comet? Avi Loeb responds to new research
A March 22 study suggests that 'Oumuamua, which passed us in 2017, was a comet from another solar system. Harvard astronomer Avi Loeb strongly disagrees.
March 24, 2023
Does a green sky predict a tornado is coming?
If you see a foreboding, green sky, it's best to take cover. A tornado might not be approaching, but green skies can be a sign of hail and other bad weather.
March 23, 2023
Is a solar flare the same thing as a CME?
Solar Cycle 25 is fairly active now, and that means more solar activity. So, what's the difference between a solar flare and a coronal mass ejection (CME)?
March 22, 2023
Active volcanoes on Venus found in Magellan data
Scientists have evidence for an active volcanic vent on a known Venus mountain. It's the first direct evidence of active volcanoes on Venus!
March 15, 2023
