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Where’s the moon? Waning crescent

A waning crescent moon is sometimes called an old moon. It’s seen in the east before dawn.

Gorgeous Dry Tortugas night skies

The National Park Service normally doesn’t allow night photography at the Dry Tortugas, but made an exception for this project.

Spectacular rocket reentry over US West

Observers in the U.S. West saw a disintegrating meteor – a fireball, or extremely bright meteor – on July 27, 2016. It was the reentry of a Chinese rocket body.

Top 10 tips for meteor-watchers

How to watch a meteor shower. Tips for beginners.

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Delta Aquarid radiant point near Skat

How to spot the radiant point for the Delta Aquarid meteor shower, going on now. Plus … why meteors in annual showers have radiant points.

How much warning for supervolcanoes?

Yellowstone supervolcano could deposit ash across the U.S. Northwest, clogging rivers and streams and affecting agriculture. How much advance warning might we have?

Star of the week: Epsilon Lyrae

Binoculars reveal Epsilon Lyrae as a double star – two stars in one. A telescope shows that each component star is also a double. The double double star!

Air conditioning’s big global impact

Higher global temperatures combined with higher global incomes mean more air conditioners. But what do more air conditioners mean?

Being called a bird brain is no insult

A new study has found that bird brains have significantly more neurons than do mammal – even primate – brains of the same mass.

Trio of solar flares

The sun emitted 3 mid-level solar flares on July 22-23, 2016. This is what NASA’s Solar Dynamics Observatory saw.

See all 5 bright planets after sunset

Three of the 5 planets are easy to see. Two aren’t so easy. Charts and info here that can help you see all 5 planets together in late July and early August, 2016.

Watchers spy rare white whale Migaloo

Not all experts agree that the white whale spotted off Australia’s east coast on Tuesday was the beloved Migaloo. But most are adamant it was.

Last quarter moon was July 26

Fun time to see a last quarter moon: just after it rises, shortly after midnight. Then the lighted portion points downward, to the sun below your feet.