Posts by 

Deborah Byrd

Human dam-building has caused a small (but astonishing) pole shift

Human dam-building - nearly 7,000 dams from 1835 to 2011 - has shifted Earth's poles and caused a drop in global sea levels.

Summer Triangle star: Vega is bright and blue-white

There's a noticeable star pattern called the Summer Triangle in the east on July and August evenings. Its brightest star is blue-white Vega.

Double detonation supernova destroyed this star!

Check out this amazing image of a supernova remnant, showing its star exploded twice! And hear from the scientists who created the image.

Summer Triangle: Star pattern of the season

On June and July evenings, you’ll find the Summer Triangle in the east at nightfall. It swings high overhead after midnight and sits in the west at daybreak.

Why aren’t the hottest days on the solstice?

June solstice 2025. It's the longest day for us in the Northern Hemisphere, but the hottest days for the northern Earth are still to come. Why is that?

Northernmost sunset is on the June solstice, today!

The northernmost sunset (and sunrise) happens at the June solstice. Here's some quick info that'll help you connect with nature on this special day.

Another SpaceX Starship explosion! Huge fireball during test

A SpaceX Starship upper stage exploded during a static-fire test on June 18, at SpaceX's Starbase in Boca Chica, Texas. See the video.

Why do stars twinkle, but planets do not?

Seen from space, both stars and planets shine steadily, but seen from Earth, stars twinkle while planets (usually) do not. Here’s why.

Which moon phase is best for stargazing? That depends.

Which moon phase is best for stargazing? Most astronomers would tell you that the best moon is no moon. But it depends on what you want to see.

Starship Flight Test 9 soars to space, then loses control

SpaceX's Starship rocket lifted off for the 9th time. It made it into space, then sprang a leak, spun out of control and tumbled back to Earth's atmosphere.

EarthSky Newsletter

Nearly half a million daily subscribers love our newsletter. What are you waiting for? Sign up today!

Join now to receive free daily science news delivered straight to your email.