Search found 5 matches
- Fri Jul 19, 2013 2:48 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Take a Picture of Saturn (2013 Jul 19)
- Replies: 22
- Views: 5611
Re: APOD: Take a Picture of Saturn (2013 Jul 19)
emc ... I'm not taking any chances ... I'm going out at both times ... starting to wave 5 minutes early and ending 25 minutes later than when I start ... both times ... This is a once in a lifetime opportunity ... I think ...
- Fri Jul 19, 2013 12:18 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Take a Picture of Saturn (2013 Jul 19)
- Replies: 22
- Views: 5611
Re: APOD: Take a Picture of Saturn (2013 Jul 19)
so emc and Ed ... anyone ... what time do you think we really need to be waving at Saturn tonight, given that it's about 80 light-minutes away??
This is important stuff !!
This is important stuff !!
- Fri Jul 19, 2013 11:58 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Take a Picture of Saturn (2013 Jul 19)
- Replies: 22
- Views: 5611
Re: APOD: Take a Picture of Saturn (2013 Jul 19)
I think that if you wave at Saturn tonight starting at 5:27 (E) you will have missed the boat by approx 80 minutes ... which is the amount of time it takes light to get to Saturn at a distance of 900,000,000 miles. Am I right ? JL-Virginia
- Tue Jun 18, 2013 11:43 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Dry Ice Sled Streaks on Mars (2013 Jun 17)
- Replies: 25
- Views: 5418
Re: APOD: Dry Ice Sled Streaks on Mars (2013 Jun 17)
I don't think the dry ice theory fits ... the "linear gullies" would get narrower toward the bottom of the mound as the ice sublimes. My Theory: These are stretch marks. The mounds were once relatively flat, but molten sulfer flowed out of the ground (smoothly, not in an explosion) a long ...
- Mon Jun 17, 2013 11:39 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Dry Ice Sled Streaks on Mars (2013 Jun 17)
- Replies: 25
- Views: 5418
Re: APOD: Dry Ice Sled Streaks on Mars (2013 Jun 17)
I have a hard time with the dry ice theory. These streaks remain constant width until the finish line. A ball or chunk of dry ice would sublime as it travels down the slope ... which would cause it to become smaller until vaporized ... which would not cause a constant-width line.