Magazine | Page 184 of 278 | Astronomy.com

Glenn Chaple’s Observing Basics: A historical perspective

Videos from the Tucson Gem and Mineral Show

The current theory of lunar genesis says a Mars-sized object collided with Earth and ejected material that later coalesced into the Moon. Is it just by chance that the newly formed Moon adopted an orbit that coincides with the ecliptic plane?

The Sun’s disappearing act

Is there any evidence that Earth’s magnetic poles (or any other planet’s) have reversed? What would cause such a reversal?

Astrophotography

Why are all moon photos in black and white, and yet other planets show color?

Observing, The Moon

Keep observing the Moon

Is every star in a designated galaxy? Are there any “rogue” stars?

David H. Levy’s Evening Stars: An observing trip in time

More views of the North America Nebula

Ask Astro web extra: Is it true that Venus has a longer day than its year?

Phantasmagoria: Transient Luminous Events