Posts by 

Deborah Byrd

Our Milky Way’s central black hole flashes unpredictably

Our Milky Way's central black hole flares unpredictably, both day to day and also over the long term. Astronomers want to know why.

Moon and bright stars on January 12, 13 and 14

Look for the moon and bright stars on the evenings of January 12 to 14. You'll see the Pleiades and Aldebaran close by the waxing moon.

After the Boulder fire, a corona around the sun

Corona around the sun, caused by thin clouds in front of the sun, or perhaps pollen, after the devastating Marshall Fire in Boulder County, early January 2022.

Crescent moon, crescent Venus

As Venus nears its passage between the Earth and sun on January 8-9, it appears in our sky as a very thin crescent. Photos and insights here.

Moon and 4 planets after sunset January 3 to 5

See the moon and four planets after sunset January 3 to 5, 2022. It'll be tough to spot Venus and Mercury. Jupiter and Saturn will be much easier.

Watch for Mercury, too, as 2021 ends

Watch for Mercury, the sun's innermost planet, as 2021 ends. Bright Venus will be falling into the sunset glare. Mercury will be nearby.

Moon, Mars and Antares as 2021 ends

Moon, Mars and Antares: Start watching the east a few days before December 31, 2021, for red Mars and red Antares. On December 31, the moon will join the show.

How to catch the elusive green flash

It's not hard to see a green flash with the eye alone, when sky conditions are right, and when you're looking toward a very clear and very distant horizon.

Comet Leonard in the evening sky

The first comet to be found in 2021 was Comet Leonard (C/2021 A1). It's now the brightest and best comet of this year! Charts and more here.

Ursid meteor shower peaks morning of December 22

The Ursid meteor shower always peaks around the December solstice. The dark hours before dawn are best. This year, a nearly full moon interferes.