Search found 10 matches
- Tue Mar 04, 2008 9:36 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Martian Dunes Thawing (APOD 03 Mar 2008)
- Replies: 33
- Views: 12333
Duh! All 3 of my above questions are succinctly answered in the Wikipedia entry on barchan dunes , linked to from within the text of the March 3/08 Martian dunes APOD . The answers are: 1) Yes, wind is from upper left to lower right of Martian dunes pic. 2) Dunes move in same direction as wind. 3) I...
- Tue Mar 04, 2008 7:55 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Martian Dunes Thawing (APOD 03 Mar 2008)
- Replies: 33
- Views: 12333
- Mon Mar 03, 2008 6:32 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Scale of APOD pictures
- Replies: 8
- Views: 2641
Re: Scales needed for almost all APODs
Great picture of Barchan Sand Dunes. An included scale, or note in the text, would leave me more time to wonder about the processes. (I did find a scale (cm / pixel!) by searching deeper). Many thanks for so many great images. Seeking, or suggesting the need for an indication of, the scale of the M...
- Sat Sep 22, 2007 9:16 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Including links to specific APOD's in forum posts
- Replies: 15
- Views: 6244
- Sat Sep 22, 2007 8:39 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Including links to specific APOD's in forum posts
- Replies: 15
- Views: 6244
- Fri Sep 21, 2007 9:08 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Including links to specific APOD's in forum posts
- Replies: 15
- Views: 6244
You could probably write a simple javascript button for inserting today's APOD link. Yeah, but it's not just today's APOD link we're talking about, but rather a take-charge automagical way to apply the right URL link to any typed reference to a past APOD which includes the specific date. My origina...
- Thu Sep 20, 2007 11:15 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Including links to specific APOD's in forum posts
- Replies: 15
- Views: 6244
What you'd really need is constant text monitoring process applying suitably shaped fuzzy logic, or even a big Boolean sort of script, to recognize and automatically link variously worded references to specific APODs to the correct web page within a few seconds, prompting for confirmation (with a di...
- Fri Sep 07, 2007 1:20 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Light lines from stars - artifacts or significant?
- Replies: 5
- Views: 2309
I found another excellent concise explanation of these diffraction spikes: http://spider.ipac.caltech.edu/staff/kaspar/obs_mishaps/images/int_reflection2.html I also realized that there is one bit of useful information that these diffraction spikes convey: in shots of extragalactic phenomena, diffra...
- Fri Sep 07, 2007 1:12 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Including links to specific APOD's in forum posts
- Replies: 15
- Views: 6244
Including links to specific APOD's in forum posts
Ideally, users would include the URL for any specific APOD referred to in their posts on this forum, especially when a specific APOD is the main subject of their posting. Unfortunately the practice is rare, despite the convenience to readers, increased likelihood of responses, and the ease with whic...
- Tue Jul 24, 2007 9:45 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Light lines from stars - artifacts or significant?
- Replies: 5
- Views: 2309
Light lines from stars - artifacts or significant?
In many astronomical images, stars have those characteristic lines of light coming out of them, usually 4 major lines forming a cross centred on the star, though not always perfectly vertical. Sometimes additional smaller fainter lines emanate from the star between the big 4 lines. I'm sure everyone...