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Deborah Byrd

Apollo and the moon-landing hoax

Why do people persist in denying that human beings landed on the moon?

Volcanic mood rings

The crater lakes at the summit of Kelimutu volcano in Indonesia change colors from day to day. The colors can change from white, green, blue and brown to black.

Deneb and Cygnus the Swan

The star Deneb in its constellation Cygnus the Swan are part of the famous Summer Triangle.

June 2018 ties for 3rd-warmest June on record

June 2018 continued the warming trend of the past 40 years. Plus, a word about the climate change myth that there’s been no warming since 1998.

Whoa! Flash flood footage from Utah

Amazing flash flood footage from Utah, July 16, 2018.

Altair and Aquila the Eagle

Look for the star Altair in the east on July evenings. You’ll recognize it for the 2 fainter stars on either side of it … as if the 3 were “walking the Milky Way hand in hand and three abreast.”

See it! Last night’s moon and Venus

Photos from EarthSky friends around the world of Sunday evening’s spectacular moon and planet Venus, and Saturday’s moon and Mercury. Thanks to all who submitted or posted to our Facebook page! Miss then? Try again Monday.

All you need to know: Delta Aquariid meteors in 2018

With the long-running Delta Aquariid meteor shower already in progress, and the moon in a waxing crescent phase – and gone from the sky after midnight – we’re beginning to receive meteor photos.

How the moon’s orbit makes supermoons

An explanation of why extra-close perigees and extra-far apogees happen at new and full moons.

See it! Crepuscular rays

Those beams of light shooting out from the horizon or down from the clouds are called crepuscular rays, or sunrays. Beautiful, mysterious and very noticeable.