Magazine | Page 201 of 278 | Astronomy.com

Observing Basics web extra: Explore an imperfect Moon

In stellar magnitude estimates, why do larger numbers represent dimmer objects? Shouldn’t it be the other way around?

How do the bars in barred spirals form?

Free preview: Glenn Chaple’s Observing Basics, “An imperfect Moon”

Cosmology, Exotic Objects

Could large numbers of black holes account for much of the “dark matter” estimated to exist in our universe?

Could the meteorite that formed the Hellas Basin on Mars have triggered the volcanic eruptions on the other side of the planet that created Olympus Mons?

Astro Confidential web extra: Extending the conversations

Astrocombing for exoplanets

Stephen James O’Meara’s Secret Sky: Fireballs from the Scorpion

Bob Berman’s Strange Universe: How much solstice can you handle?

Venus blazes before dawn

Ask Astro web extra: What is the difference between astronomy and astrophysics?