Albireo, beloved double star

Albireo is known best for the striking color contrast between its two stars – the brighter gold star and the dimmer blue star.

Looking along a road toward a large telescope dome, with a second dome to the right.

Astronomy ambassadors in Chile: Cerro Pachón and Cerro Tololo

Robert Pettengill reports from the busy ACEAP (Astronomy in Chile Educator Ambassador Program) annual trip, happening now in Chile.

Dark Rift in the Milky Way

Standing under a dark sky in late July or August? Look up! You’ll notice a long, dark lane dividing the bright Milky Way. This Dark Rift is a place where new stars are forming.

How to find Delta Aquariid radiant point

How to spot the radiant point for the Delta Aquariid meteor shower, going on now. Plus … why meteors in annual showers have radiant points.

Radio dishes on a high plain in the Chilean Andes.

Astronomy educators to rendezvous in Chile

Members of the Astronomy in Chile Educator Ambassadors Program are heading to Chile for a tour of its great observatories, July 27 to August 5, 2019.

Find M4 near the Scorpion’s Heart

If you’ve never found a deep-sky object on your own before, M4 – a globular star cluster, one of the nearest to our solar system – is a grand place to start. It’s near the bright red star Antares in the easy-to-spot constellation Scorpius the Scorpion. To spot it, you’ll need a dark sky.

Delta Aquariids 2019: All you need to know

Late July presents the nominal peak of the Delta Aquariid meteor shower, but this long and rambling shower is officially active from about July 12 to August 23 each year.

M17 is the Omega Nebula

The Omega Nebula – M17 – is visible through binoculars and glorious in a low power telescope. It’s one of our galaxy’s vast star-forming regions. How to find it.

Find the Crown of the Scorpion

Here’s a cool asterism, or noticeable pattern of stars, to look for in your sky. The Scorpion’s Crown consists of just 3 stars.

What’s a Blood Moon?

In some circles of Christian prophecy, a Blood Moon is a member of a special kind of lunar tetrad : four total lunar eclipses in a row, each separated by six lunar months. By this definition, the last Blood Moon occurred on September 28, 2015.