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A really big asteroid is about to pass Earth

Named for Florence Nightingale, asteroid 3122 Florence is the biggest near-Earth object to pass this close since this category of objects was discovered over a century ago! It might be visible in binoculars.

When’s the next U.S. total solar eclipse?

After the August 21, 2017 eclipse, the next total solar eclipse visible from North America will be April 8, 2024.

How to watch Monday’s eclipse online

Can’t travel to the path of totality for the August 21, 2017 total solar eclipse? Never fear. Here’s how to watch online from a variety of sources.

What to look for in a total solar eclipse

The August 21 total eclipse will last several hours. There will be many interesting things to look for. Bookmark this handy checklist of must-see events and effects, from eclipse gurus Fred Espenak and Mark Littmann.

See 4 planets during the total eclipse

During a total solar eclipse, the daytime sky darkens, and bright stars and planets pop into view. Charts here, identifying which ones for the August 21, 2017 eclipse.

Best places to watch 2017 eclipse

Looking for road maps showing the path of totality for the August 21, 2017 eclipse? Click here.

Add your eclipse event to the AAS map

The American Astronomical Society wants to help you publicize your event for the August 21, 2017 total solar eclipse.

Moon on its way to the eclipse

Insights and a cool chart from astronomer Guy Ottewell. Plus, if you click in, you’ll find photos of waning crescent moons from the past few mornings …

Born under the sign of Ophiuchus?

Born between November 29 and December 18? If so, the sun passes in front of Ophiuchus on your birthday. Ophiuchus is a constellation – not a sign – of the zodiac.

Sunspots during solar eclipse? Probably

Add sunspots to the list of wondrous sights to look for during the total solar eclipse of August 21, 2017.

Dark Rift in the Milky Way

Look edgewise into our galaxy’s disk, and you’ll notice a long, dark lane dividing the bright starry band of the Milky Way. This Dark Rift is a place where new stars are forming.

See it! 2017’s Perseid meteor shower

Despite a bright moon, the brightest Perseids put on a good show. See photos from the EarthSky community here.

10 tips to minimize moon and optimize 2017’s Perseid meteor shower

A waning gibbous moon will do its best to drown out the 2017 Perseid meteor shower. Here are some tips for enjoying the moonlit Perseid meteors in 2017.

The story behind the 2017 eclipse stamp

A 1st-of-its-kind stamp that changes when you touch it, commemorating the August 21, 2017 total solar eclipse. Fred Espenak – whose photos are on the new stamp – tells the story.

How to know your eclipse glasses are safe

Unscrupulous companies are printing ISO certification labels on fake eclipse glasses. Click here for a link to a reputable vendors page from the American Astronomical Society.

Star of the week: Altair

Altair needs only 10 hours to spin once on its axis, in contrast to roughly a month for our sun. This mighty star spins on its axis faster than Earth does!

Perseid meteor stream in space

Spectacular visualization using NASA data to render known Perseids meteoroids in space. You know how meteor showers come from comets? Picture it, here.

Eclipse day checklist

This checklist – from eclipse master Fred Espenak – will help you plan the perfect total solar eclipse experience! Do your homework and the only other thing you’ll need is perfect weather on August 21!

Why no eclipse every full and new moon?

In 2017, there are 12 full moons and 12 new moons, but only 4 eclipses – 2 lunar and 2 solar.

Total eclipse of sun: August 21, 2017

All you need to know about the 1st total solar eclipse visible from the contiguous U.S. since 1979, from eclipse master Fred Espenak.