Search found 3 matches

by polaris
Thu Aug 20, 2009 4:14 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Eclipse City (APOD 2009 August 20)
Replies: 32
Views: 3944

Re: Eclipse City (APOD 2009 August 20)

I'm afraid I'm a bit confused by how all these images of the eclipse formed. We've seen something similiar http://antwrp.gsfc.nasa.gov/apod/ap051014.html when the sunlight goes through a pin-hole. But you don't see a round disk on the ground when sunlight reflects off a building or mirror on a non-e...
by polaris
Thu Aug 13, 2009 4:47 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Block Island Meteorite on Mars (APOD 2009 August 13)
Replies: 28
Views: 14713

Re: Block Island Meteorite on Mars (APOD 2009 August 13)

Here's a quick 3D red-blue pic I put together from Oppy's Sol 1967 front hazcam http://twitpic.com/d31bv

The 3D-Howto are still online, after all these sols, at http://marsrovers.jpl.nasa.gov/spotlight/3d01.html

Peter
by polaris
Wed Feb 18, 2009 6:29 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Iridium, Cosmos collision (APOD 2009 Feb 18)
Replies: 38
Views: 7581

Iridium, Cosmos collision (APOD 2009 Feb 18)

Something occurred to me after watching the AGI animation of the debris caused by this collision: it's unlikely the debris will re-collide on the other end of the orbits (over Antarctica) because I doubt the orbits intersect there, too. But shouldn't all the debris re-collide over the Arctic, again ...