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Watch the Boeing Starliner OFT-2 mission launch July 30

July 28, 2021

Why wildfires create red suns and moons

Red suns and moons have been seen all over North America in July 2021. The reason is drifting wildfire smoke. Here's why it happens.

Les Cowley

July 28, 2021

Today's Image

Russia’s Nauka module en route to ISS

Russia's Nauka module reportedly had some issues after reaching orbiting. It's due to dock with the International Space Station on July 29.

Deborah Byrd

July 28, 2021

Tonight

Mars and Regulus in conjunction July 29

The Mars-Regulus conjunction happens on July 29, 2021. Mars will be 0.7 degrees N. of Regulus. Watch on July 28, too, and look low in the western twilight.

Bruce McClure

July 28, 2021

Earth

Future sea level rise: When, where, how much?

Scientists have grown more confident about sea level rise projections for the next few decades, but competing factors make it hard to see far into the future.

EarthSky Voices

July 28, 2021

Space

1st moon-forming disk around an exoplanet

Astronomers have found solid evidence for a moon-forming disk around a distant exoplanet. It provides new clues as to how moons and planets form.

Paul Scott Anderson

July 27, 2021

Astronomy Essentials

Perseid meteor shower 2021: All you need to know

In 2021, the peak mornings for the Perseid meteor shower - August 11, 12 and 13 - will be moon-free. Now all you need is a dark sky!

Bruce McClure

Deborah Byrd

July 26, 2021

Astronomy Essentials

Delta Aquariid meteor shower 2021: All you need to know

Late July presents a nominal peak for the Delta Aquariid meteor shower, but this long and rambling shower is active from July 12 to August 23 each year.

Bruce McClure

Deborah Byrd

July 26, 2021

Astronomy Essentials