Search found 2 matches
- Sun Jan 30, 2011 4:12 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Gibbous Europa (2011 Jan 30)
- Replies: 22
- Views: 6267
Dirt on Europa
. . . or any other planet or planet's moon, for that matter: What, exactly comprises the "dirt" on these. That word is used in the explanation of today's picture. What is said "dirt" made of? What are the components of "dirt" on Mars? How does it differ from that on Ear...
- Tue Aug 04, 2009 4:27 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Triple Sunrise Over Gdansk Bay (2009 Aug 04)
- Replies: 338
- Views: 53612
Re: Cause of Triple Sunrise (APOD 2009 August 4)
I once worked on the Pine Ridge reservation in South Dakota. Such "optical illusions" as this were frequent occurances there, and were called "sundogs". I've also seen sundogs at sunset, on the Oregon coast.
Sarah
Sarah