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Editors of EarthSky

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.

Mercury – near Jupiter – after sunset in late March

Mercury is visible in the evening sky. Look in the sunset direction as the sky is darkening. The planet reaches its greatest elongation on April 11, 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.

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)?

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!

What are the Ides of March, and why should you beware?

What are the Ides of March? That's March 15. In Shakespeare's play, Julius Caesar was warned to "Beware the Ides of March" before his assassination.

Another atmospheric river is slamming California

Another atmospheric river will slam California today, March 14, 2023, bringing dangerous rainfall amounts and additional flooding.

Zodiacal light: All you need to know

The zodiacal light is an eerie light extending up from the horizon. And the months around the March equinox is a good time to see it. How to see them, here.

Atmospheric rivers now have intensity rankings

Scientists are pushing an intensity scale for atmospheric rivers, much like the hurricane intensity scale. They think it'll help keep people safer.

March full moon is March 6-7 in 2023

The March full moon on March 6, 2023, is near the bright star Regulus in the constellation Leo. Watch for it from dusk to dawn!