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Lunar eclipse

Observing

Red Moon Meets Red Planet in Longest Total Lunar Eclipse of the Century

Not only will the Moon will be totally eclipsed this Friday, but Mars will be at opposition and shine in tandem with the red Moon all night!

Earthrise

Astronomy & Observing News

Apollo Astronauts Warmed the Moon

A new study sheds light on an old mystery surrounding anomalous readings from the Apollo landing sites.

Observing

Seven Nights of Enticing Lunar Sights

Come along for a 7-night tour of some of the Moon's most compelling features visible in small telescopes.

Tycho Crater, Image by Frank Barrett

Observing

Full Moon Is Tycho Time

With this week's full Moon, the dazzling crater Tycho will be in full regalia. Time to catch some rays!

Burnt orange beauty

Observing

Make the Most of January's Total Lunar Eclipse

An unusual dawn total lunar eclipse presents special challenges and great photo opportunities. Here's what you need to know to make the most of it.

Celestial News & Events

What's the Thinnest Crescent Moon You Can See?

A slender Moon is an beautiful and inspiring sight. December and January offer several opportunities to see these exceptional crescents.

Full Easter Moon

Astronomy & Observing News

How Bright is the Moon . . . Exactly?

An upcoming study will take the old calibration standard of the Moon's brightness to a new level of precision.

Moon's ancient atmosphere

Astronomy & Observing News

Ancient Moon Had Atmosphere Made of Volcano Smoke

Roughly 3.5 billion years ago huge volcanoes released enough gas to cover the Moon with a thin atmosphere that was visible from Earth.

Observing

11 Easy Sights for Full Moon Nights

Ah, full Moon. Time to put the telescope away and lead a normal life. Then again, maybe not. Here are 11 things to coax you back out for another look.

Observing

Bah, Humboldt! Visiting a Fringe Crater

Meet Humboldt, a magnificent lunar crater compromised by its life on the edge.

Observing

Sneezing at the Full Moon

Pollen's no friend of the allergy-prone, but there's an upside to your itchy eyes — weird and colorful coronas around the Moon and Sun.

Observing

Three Crescents and a Sinking Comet

If you're crazy about crescents, you'll find your happy place this week between the Moon and Venus. Meanwhile, we shift our focus from 45P/H-M-P to another famous periodic comet, 2P/Encke.

Supermoon a Supersight

Observing

Behold November's Super-Duper Supermoon

You won't want to miss the biggest, brightest full Moon in more than 68 years. Find out what makes this supermoon so special and how best to view it.

Perigee and apogee moons

Observing

What is a Supermoon? Facts vs. Fiction

The perpetuation of the supermoon myth is mostly motivated by desire for publicity. But much of what we call the supermoon is just our eyes playing tricks on us.

View of the Moon-Jupiter meeting, October 28, 2016

Astronomy & Observing News

Jupiter Greets Crescent Moon in the Pre-Dawn Sky

On Friday, October 28th, the waning crescent Moon and brilliant Jupiter get together for an early morning conjunction.

Lava Bumps Near Copernicus

Observing

A Little Guide to Lunar Domes

With this week's waxing Moon, we set off to explore its volcanic past with a look at a dozen intriguing lunar domes.

Visibility zones for Two Occultations

Astronomy & Observing News

See Two Tricky Occultations — Neptune and Lambda (λ) Aqr

Now you see 'em, now you don't. Watch the Moon occult Neptune and nearby Lambda Aquarii on the same night.

Phases of the Moon

Resources and Education

What are the Phases of the Moon?

The phases of the Moon are determined by the relative positions of the Moon, Earth, and Sun.

Mystery Dark Spot?

Explore the Night with Bob King

Are You Game for April's Lunar Observing Challenge?

With astronomy being celebrated around the globe this month, join the fun by participating in a unique lunar observing challenge: track down 20 features once thought to show evidence of change from weather, geology, and even life.

A Full Crescent Moon

Observing

Meet the Meager March Moon

Baptized in the fire of yesterday's total solar eclipse, a very young crescent Moon emerges into the night sky.