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How to see the legendary green flash

A sea horizon is best for seeing a green flash, but any distant, flat horizon will do. You have to look at the last moment before the sun disappears.

Best time to see Saturn is near!

We’ll pass between Saturn and the sun on June 15. Tonight – or any night soon – watch for it in the vicinity of the red star Antares.

Deneb, tail of Cygnus the Swan

Deneb marks the Tail of Cynus the Swan … and the head of a crosslike pattern known as the Northern Cross.

Star of the week: Polaris, the North Star

The entire northern sky wheels around Polaris. But it’s not the brightest star in the sky. In fact, Polaris ranks only 50th in brightness.

Which moon phase best for stargazing?

Most astronomers would tell you that the best moon is no moon.

Find the Keystone in Hercules

The Keystone is a noticeable pattern of four stars in the constellation Hercules. The bright star Vega acts as your guide to finding it.

Meet Corvus the Crow

In 2017, let Jupiter and Spica, brightest star in Virgo, introduce you to the constellation Corvus the Crow. Corvus is recognizable for its compact, boxy shape.

Where is the Milky Way on May evenings?

On May evenings, the disk of our Milky Way galaxy lies flat, nearly parallel to the plane of your horizon.

Bright star Vega on May evenings

Bright, bluish Vega marks the constellation Lyra the Harp.

Star of the week: Arcturus

Arcturus, a red giant, looks orange to the eye. It’s the brightest star on the northern half of Earth’s sky dome.

Virgo? Here’s your constellation

The constellation Virgo the Maiden fully returns to the early evening sky – with her feet planted on the eastern horizon – in early May.

What are the full moon names?

Lists of common full moon names – both by month and by season – for both the Northern and Southern Hemispheres.

Keep watching Eta Aquarid meteors

Did you see any Eta Aquarid meteors Friday morning? Saturday morning is a good time to watch, too. Try around 3 a.m. until dawn. Be sure to get away from city lights.

Thuban is a former Pole Star

Thuban was the Pole Star some 5,000 years ago, when the Egyptians were building the pyramids.

Moon and Regulus on May 3 and 4

Bright Jupiter is nearby. From Australia and New Zealand, the moon occults or passes in front of Regulus on the evening of May 4, 2017.

Moon and Gemini stars on May 1

Stars near tonight’s moon. Plus a skywatcher’s trick to help you understand the moon’s motion among the stars. And some tips on finding sky directions!

Venus at its brightest in morning sky

Day side of Venus now covering more area – as seen in Earth’s sky – than at any other time during this morning apparition. So Venus is now at its brightest!

A star whose magnetic field flipped

Tau Boötis was the first star, other than our sun, ever seen to undergo a magnetic field reversal. This post also includes 2 great videos about our sun’s magnetic reversals.

Hadar is a southern pointer star

Hadar, aka Beta Centauri, joins Alpha Centauri in pointing to the Southern Cross. It’s a triple system. Two of its stars will someday become nearby supernovae.

Spica is a whirling double star

Spica, the brightest star in the constellation Virgo, is a whirling double star. How to see it in your sky.