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Venus after sunset and before sunrise!

The planet Venus is now appearing in the west after sunset and in the east before sunrise. Don’t believe it? Astronomer Bruce McClure reports on his observation.

What is stellar magnitude?

Brightest stars to the eye are 1st magnitude, and dimmest stars to the naked eye are 6th magnitude. How the magnitude scale works in astronomy and why it’s useful.

Watch the sun’s shift on your horizon

Here’s a fun activity for the coming months. Note how far the sun moves on your horizon each day, as spring shifts toward summer (or autumn towards winter).

March equinox! Happy spring or fall

The 2017 vernal or spring (or fall) equinox occurred on March 20 at 10:29 UTC. Spring for the north – fall for the south – of Earth’s globe.

Fastest sunsets near equinoxes

We’re talking about the amount of time needed for the body of the sun to sink below the horizon. It’s true. The sun actually sets faster around the time of an equinox.

How to take great photos of star trails

When a camera captures a star’s movement across the sky, it’s called a star trail. An astrophotographer explains how he does it.

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.

Best places to watch 2017 eclipse

Here are 10 great viewing spots to watch the August 21, 2017 total solar eclipse, weather permitting.

See 4 planets during 2017 solar 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.

Add your eclipse event to the AAS map

The American Astronomical Society is the U.S. association of professional astronomers. The Society wants to help you publicize your event for the August 21, 2017 total solar eclipse.

March 4 moon hides Aldebaran

The occultation by the moon of Aldebaran – brightest star in Taurus the Bull – was visible from North America. Great set of photos here from the EarthSky community!

Astro festivals, star parties, workshops

The season for star parties – where amateur astronomers with telescopes will show you the night sky – is just ahead. Find one near you …

March guide to the bright planets

In March, 4 of the 5 bright planets – Venus, Mars, Jupiter and Mercury – are in the evening sky. Saturn is still a morning planet, for now.

Catch Comet Encke this evening!

The comet’s orbital period is short – only 3.3 years – and the orbit is relatively close to Earth. Encke’s Comet is now on its 63rd known visit to our part of space.

What is the zodiacal light?

The zodiacal light is an eerie light extending up from the horizon. Late winter/early spring is a great time to see it.

Star brightness versus star luminosity

Some extremely large and hot stars blaze away with the luminosity of a million suns! But other stars look bright only because they’re near Earth.

Gemini? Here’s your contellation

How to see the constellation Gemini in the night sky, plus some of ancient lore about the legendary Twins.

Got 5 minutes? Learn to see Saturn

June, July and August are especially good months for viewing Saturn in 2017. But you can find it this month, too, especially when the moon sweeps past on February 19, 20 and 21.

Valentine’s Day

Astronomer Guy Ottewell reflects on the planet of love.

Green Comet 45P: Photos and video

Green Comet 45P has been in our sky for months and passed closest on February 11, 2017. It’s a faint one, but intrepid astronomers have captured some wonderful images!