2023, 09 September

In Our Skies, September 2023: Annular Solar Eclipse

In Our Skies, September 2023: Annular Solar Eclipse

You’ve probably noticed that the Moon appears larger when it lies just above the horizon. This is just an optical illusion. However, the Moon actually does vary in its distance from Earth because...

Measuring the Universe—How Astronomers Try

Measuring the Universe—How Astronomers Try

Stellar parallax diagram. The claims that modern-day astronomers make about the size of the universe seem almost unbelievable. To better understand the tremendous distances they’re describing, we...

Learn About Straight-line Light

Learn About Straight-line Light

When I was a boy, I enjoyed making tents. I liked to use covers to make cozy tents with rooms and doorways. So if you enjoy making tents too, you will enjoy this activity. I will give you an...

Caption This Penguin

Caption This Penguin

King Penguin. Photo © Ben Goode|Dreamstime.com. We invite you to submit your caption for this photograph of a King Penguin. The photograph will be used on the back of the January issue, along with...

Rock Wren Record

Rock Wren Record

Rock Wren. Photo © Zack Abbey / CC-BY-4.0. The parking lot was full. People milled around, all carrying binoculars, spotting scopes, or cameras. We found another parking area nearby, grabbed our...

“Zzuss!”

“Zzuss!”

“Zzuss—zzuss…” The alarm call rings through the silent forest. A bird, startled, leaves his branch and watches from a new perch. “Zzuss, zzuss, zzuss!” Again the call sounds, louder and more urgent...

Aquila

Aquila

Aquila, the Eagle, is a mid-sized constellation that lies right along the summer Milky Way just south of the zenith on September evenings in the mid-northern latitudes. Altair, the brightest star of...