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Bruce McClure

See moon and Regulus before dawn

Regulus is considered the Heart of the Lion in the constellation Leo. Learn to recognize and its constellation in the next few mornings.


Bright star Deneb transits at nightfall

When the sun or a star transits, it’s at its highest in the sky. Deneb’s transit at nightfall marks a shift toward winter – or summer – depending on where you are.


What is an astronomical unit?

Astronomers use astronomical units – or AU – to describe solar system distances. Definition of AU here. Also, mean distances in AU to prominent solar system objects.

Image via  datuopinion.

Star of the week: Deneb Kaitos

Look for Deneb Kaitos – brightest star in Cetus the Whale – highest in the sky around mid-evening.


Moon and Gemini stars next few nights

On October 21, 22 and 23, you’ll find the moon traveling in front of the constellation Gemini the Twins, to the south of its bright stars Castor and Pollux.

The Orionids radiate from a point near the upraised Club of the constellation Orion the Hunter.  The bright star near the radiant point is Betelgeuse.

Orionid meteor shower peak tonight!

Orionid meteors probably most prolific in the few hours before dawn Friday. The moon will prove troublesome this year.

Taken during the 2015 Perseid meteor shower in August - at Mount Rainier National Park - by Matt Dieterich.  He calls the photo 'Skyfall.'

EarthSky’s meteor shower guide for 2016

Look here for information about all the major meteor showers between now and the year’s end.


Moon occults Aldebaran October 18-19

From much of the US, Mexico, Caribbean, Central America and southeast Canada, Aldebaran will disappear behind the moon’s lit side and reappear on its dark side.

Photo Credit: Dan Bush

See a daytime moon after sunrise

The moon is up during the day half the time, as it orbits Earth once a month. The next few mornings are a good time to notice a daytime moon.

Hunter's Moon collage by our friend Kausor Khan in India

Keep watching Hunter’s Moon October 16

If you live at northerly latitudes, the waning moon tonight will rise sooner than you might expect. If you live in the S. Hemisphere, it’ll rise later!