Search found 1897 matches
- Wed Jan 12, 2005 11:48 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
- Tue Jan 11, 2005 7:26 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Jupiter's rings
- Replies: 7
- Views: 9888
- Thu Jan 06, 2005 7:30 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
Please frogive me for not haveing time to read all 100+ pages of posts...I think this is the flash, and smoke left over from the launch of some sort of weapon...however...Why is the device not at the launch point. What could possibly move so fast that it is already out of the screen while the flash...
- Wed Jan 05, 2005 6:41 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
Re: Strange streak discussion: 2004 Dec 7 APOD
Here we have a similar effect: http://antwrp.gsfc.nasa.gov/apod/ap010219.html -Dudelman. There is a problem with your image: - in our image the streak is very straight, but slightly visible, and is darker than the sky; - in your image the streak is curved, pefectly visible, and reminds me the trace...
- Wed Jan 05, 2005 6:33 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Apod Dec 26 (black hole) - RJN or someone?
- Replies: 6
- Views: 8030
Tried to PM this, didn't worked out, message stuck in outbox
I'm trying to derive light path equation from (A1) at http://antwrp.gsfc.nasa.gov/htmltest/gi ... endix.html
From what I have
it follows that there is circular orbit at any radius, which is wrong. Where is my mistake?
Thanx.
From what I have
it follows that there is circular orbit at any radius, which is wrong. Where is my mistake?
Thanx.
- Tue Jan 04, 2005 1:50 pm
- Forum: The Observation Deck: Latest Sky Photography
- Topic: Image 04/01/2004 C/2004 Q2 from Gran Canaria-Canary Islands
- Replies: 1
- Views: 3916
- Tue Jan 04, 2005 7:50 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: HoW iS tHe FeElInG oF uSiNg A tElEsCoPe To LoOk At StArS
- Replies: 4
- Views: 4716
- Sun Jan 02, 2005 6:29 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
- Sun Jan 02, 2005 11:19 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
Re: Need for Speed II
If you can show that given a bee's body width is the width of the streak, would he have covered that distance in 1/20 sec. okay, assume the streack, 40 times longer than the bee, represents bee flight in the plane exactly ortogonal to camera axis. assume the bee is 1.5 cm long. that gives us 60cm p...
- Sun Jan 02, 2005 12:06 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
Re: 2 or 4 wings?
If you can show that given a bee's body width is the width of the streak, would he have covered that distance in 1/20 sec. and what is the distance? if you want to say: the streak is 40 times longer than the bee, so it has flied 40 times more of it's own length - no, because we have to consider thr...
- Fri Dec 31, 2004 7:35 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
Re: 2 or 4 wings?
Okay... To end up this discussion, I've made an image where you can actually see the bee itself , but it seems victorengel was first to achieve this level of quality for bee shape... Here are steps to re-produce image: 1. mix 50/50 before-after image, and filter it (Gaussian blur, 0.5 pix) 2. apply...
- Thu Dec 30, 2004 2:05 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
- Thu Dec 30, 2004 1:23 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
- Thu Dec 30, 2004 9:51 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
Re: 2 or 4 wings?
Okay... To end up this discussion, I've made an image where you can actually see the bee itself , but it seems victorengel was first to achieve this level of quality for bee shape... Here are steps to re-produce image: 1. mix 50/50 before-after image, and filter it (Gaussian blur, 0.5 pix) 2. apply ...
- Tue Dec 28, 2004 2:00 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Strange streak discussion: 2004 Dec 7 APOD
- Replies: 2124
- Views: 507514
Re: 2 or 4 wings?
I made some simple enhancements on this image. Don't know if it would help you to see complexity, or jpeg artifacts.victorengel wrote:I'm not sure how to answer this because I'm not sure where you're seeing complexity...are we not left with a relatively simple pattern?
- Tue Dec 28, 2004 7:45 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Apod Dec 26 (black hole) - RJN or someone?
- Replies: 6
- Views: 8030
The image from my above post is now wide-spread over the net, and is actually loosely cropped version of this image (see below) by J.P.Luminet; on one of his site pages you can find older, original computer-simulated image . http://lpnhe-auger.in2p3.fr/slides/vulg/TNM.gif (image removed - it's in po...
- Mon Dec 27, 2004 8:08 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Apod Dec 26 (black hole) - RJN or someone?
- Replies: 6
- Views: 8030
Apod Dec 26 (black hole) - RJN or someone?
Though this APOD is awesome piece of digital art, it is very far from how black hole would really look like. I've seen so-called "blak hole pictures" on APOD site before, and I don't understand why so misleading and non-even-close images are published on astronomy sites over and over, and ...
- Fri Nov 19, 2004 10:30 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Who is writing this comment?
- Replies: 3
- Views: 5021
- Thu Oct 14, 2004 8:44 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Nice world map
- Replies: 3
- Views: 5223
http://antwrp.gsfc.nasa.gov/apod/ap040822.html contains link http://antwrp.gsfc.nasa.gov/apod/lib/about_apod.html#srapply that sais that NASA images are in public domain, and guidelines to use them are at http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html however, 60 words you w...
- Wed Oct 13, 2004 2:04 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD Oct. 12, 2004
- Replies: 1
- Views: 4434
- Wed Oct 13, 2004 1:55 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: algorithm for meteor detection
- Replies: 5
- Views: 4453
- Tue Oct 12, 2004 5:57 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: algorithm for meteor detection
- Replies: 5
- Views: 4453
Re: algorithm for meteor detection
...comments? I have problems with english, so perhaps I've misunderstood you. Also, I come from digital image processing backgrounds (Kodak POS photo voodoo ;) ), so I will use other words here. If I understand you, you average "important" pixel values in X and then Y directions, and then...