Search found 58 matches
- Mon Oct 04, 2021 4:40 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: NGC 4676: When Mice Collide (2021 Oct 04)
- Replies: 17
- Views: 5333
Re: APOD: NGC 4676: When Mice Collide (2021 Oct 04)
https://upload.wikimedia.org/wikipedia/commons/thumb/4/40/Strasbourg%2C_Rat_King_retusche.jpg/800px-Strasbourg%2C_Rat_King_retusche.jpg <<A rat king is a collection of rats whose tails are intertwined and bound together by one of several possible mechanisms, such as entangling material like hair or...
- Mon Sep 27, 2021 3:41 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Unwrapped: Five Decade Old Lunar Selfie (2021 Sep 27)
- Replies: 20
- Views: 5291
Re: APOD: Unwrapped: Five Decade Old Lunar Selfie (2021 Sep 27)
The story is told that Buzz Aldrin was upset that HE wasn't the first man to walk on the Moon's surface. Armstrong was chosen because he was a civilian -- NASA wanted to emphasize that they were not military. Therefore, Aldrin refused to photograph Armstrong on the Moon, despite many admonitions fr...
- Sat Sep 18, 2021 5:09 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Rubin's Galaxy (2021 Sep 18)
- Replies: 38
- Views: 8419
Re: APOD: Rubin's Galaxy (2021 Sep 18)
https://apod.nasa.gov/apod/calendar/S_210918.jpg Rubin's Galaxy Explanation: In this Hubble Space Telescope image the bright, spiky stars lie in the foreground toward the heroic northern constellation Perseus and well within our own Milky Way galaxy. .... ASIDE - NOT RELATED TO ASTRONOMY The explan...
- Fri Sep 17, 2021 6:08 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Video: Flash on Jupiter (2021 Sep 17)
- Replies: 15
- Views: 3412
Re: APOD: Video: Flash on Jupiter (2021 Sep 17)
1. How can we be sure this was caused by an impact and not by some other mechanism? Stupid question I'm sure, and I'll bet the answer is that there simply is no other known mechanism! 2. This event seems to be different than the ones resulting from the breakup of comet Shoemaker-Levy 9. Did those i...
- Wed Sep 15, 2021 8:48 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mars Panorama 360 from Curiosity (2021 Sep 14)
- Replies: 24
- Views: 5886
Re: APOD: Mars Panorama 360 from Curiosity (2021 Sep 14)
All the same, much of the rover was in those frames. They chose to blot them out rather than include them. I asked the creators of the image about why the rover was not shown in their panorama, whether they had decided not to include it or if they had found the frames impossible to stitch together,...
- Wed Sep 15, 2021 8:33 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mars Panorama 360 from Curiosity (2021 Sep 14)
- Replies: 24
- Views: 5886
Re: APOD: Mars Panorama 360 from Curiosity (2021 Sep 14)
Sounds reasonable: Thanks! :) Another possibility is that as the panorama was taken in part to help plan a route for further exploration, photographing the rover itself was not necessary. All the same, much of the rover was in those frames. They chose to blot them out rather than include them. I as...
- Tue Sep 14, 2021 3:38 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mars Panorama 360 from Curiosity (2021 Sep 14)
- Replies: 24
- Views: 5886
Re: APOD: Mars Panorama 360 from Curiosity (2021 Sep 14)
MarsPanCompressed_Curiosity_1080.jpg So why is the Rovers picture deleated? Just a guess, but because the rover is so close to the camera, there are perspective shifts between shots that make stitching the frames difficult or impossible (we've seen that on other panoramas, where it looks like piece...
- Wed Sep 08, 2021 9:42 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Deep Sky Toward Andromeda (2021 Sep 08)
- Replies: 29
- Views: 7619
Re: APOD: The Deep Sky Toward Andromeda (2021 Sep 08)
@ Ann. Fascinating and informative as ever. Thanks very much. However, I am confused. I thought that the Andromeda galaxy was the most distant object visible to the unaided eye, but the description states that the Triangulum Galaxy is: "the image top is the Triangulum galaxy (M33), the third la...
- Sun Aug 29, 2021 2:23 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Orbits of Potentially Hazardous... (2021 Aug 29)
- Replies: 22
- Views: 7249
Re: APOD: Orbits of Potentially Hazardous... (2021 Aug 29)
The image shows the eccentricities of the orbits of the inner planets quite well. Mercury has an eccentricity of 0.206, which is the greatest after Pluto (0.248) (yes, I know Pluto's designation is 'controversial'*). Venus' orbit (eccentricity 0.007) is less eccentric than our own on planet Earth (0...
- Tue Aug 24, 2021 10:13 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: PDS 70: Disk, Planets, and Moons (2021 Aug 24)
- Replies: 10
- Views: 6673
Re: APOD: PDS 70: Disk, Planets, and Moons (2021 Aug 24)
Can I assume that the reason the planet, PDS 70c and the ring are shown as brighter in the image than the central star, PDS 70, is that the image has been processed to reduce the star's brightness so that the other elements of the image are not overwhelmed?
- Sat Aug 14, 2021 8:58 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Island Universe, Cosmic Sand (2021 Aug 14)
- Replies: 17
- Views: 4835
Re: APOD: Island Universe, Cosmic Sand (2021 Aug 14)
What is happening at the end of the meteor trail? It looks as if the meteor has split in two and the parts flown apart and at least one bit seems to be following a curved path.
Any explanations?
Any explanations?
- Thu Aug 12, 2021 6:53 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Thor's Helmet (2021 Jul 20)
- Replies: 9
- Views: 4295
Re: APOD: Thor's Helmet (2021 Jul 20)
https://upload.wikimedia.org/wikipedia/commons/e/e6/Maternagrane.jpg The blown-off atmosphere in NGC 2359 just happens to look like the unrealistic Viking helmets that Richard Wagner made his Viking-impersonating singers wear for his four German-language epic music dramas, Der Ring des Nibelungen. ...
- Wed Aug 11, 2021 9:56 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perseus and the Lost Meteors (2021 Aug 09)
- Replies: 22
- Views: 5748
Re: APOD: Perseus and the Lost Meteors (2021 Aug 09)
The curious case of the corkscrew meteors.... seems to conclude that the pictures taken in gusty winds & should not be relied upon. If only the meteors weren't both hypersonic & disintegrating: <<Acer is a genus of trees and shrubs commonly known as maples. The distinctive fruits are called...
- Tue Aug 10, 2021 10:26 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perseus and the Lost Meteors (2021 Aug 09)
- Replies: 22
- Views: 5748
Re: APOD: Perseus and the Lost Meteors (2021 Aug 09)
The curious case of the corkscrew meteors.... neufer, thanks for the reference. Lovely images. @ Chris Peterson: The meteor was far too quick for any possibility of my eyes or the binoculars 'wiggling' and causing any illusion of corkscrew motion. Meteors are not aerodynamically stable like an Apol...
- Tue Aug 10, 2021 10:00 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Fire in Space (2021 Aug 10)
- Replies: 6
- Views: 3313
Re: APOD: Fire in Space (2021 Aug 10)
There is an interesting article in New Scientist online concerning the shape of flames in zero or micro gravity environments:
https://www.newscientist.com/article/mg ... -on-earth/
https://www.newscientist.com/article/mg ... -on-earth/
- Mon Aug 09, 2021 7:23 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perseus and the Lost Meteors (2021 Aug 09)
- Replies: 22
- Views: 5748
Re: APOD: Perseus and the Lost Meteors (2021 Aug 09)
I once saw a very faint Perseid meteor through binoculars (8x42). It appeared brown and tumbled across my field of vision in what appeared to be a corkscrew flightpath. I've never managed to see any others through binoculars, so count myself very fortunate in that respect. That doesn't happen. It w...
- Mon Aug 09, 2021 11:15 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perseus and the Lost Meteors (2021 Aug 09)
- Replies: 22
- Views: 5748
Re: APOD: Perseus and the Lost Meteors (2021 Aug 09)
I once saw a very faint Perseid meteor through binoculars (8x42). It appeared brown and tumbled across my field of vision in what appeared to be a corkscrew flightpath. I've never managed to see any others through binoculars, so count myself very fortunate in that respect.
- Fri Jun 25, 2021 11:11 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Andromeda in a Single Shot (2021 Jun 25)
- Replies: 16
- Views: 5116
Re: APOD: Andromeda in a Single Shot (2021 Jun 25)
I wonder how different Western history would have been had Andromeda been easily visible in the sky when the Roman Catholic Church decided that the whole of creation orbited the Earth. It would have been obvious that Andromeda was a system all of itself.
- Tue Mar 09, 2021 10:47 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Three Tails of Comet NEOWISE (2021 Mar 08)
- Replies: 24
- Views: 6265
Re: APOD: Three Tails of Comet NEOWISE (2021 Mar 08)
Just a request to the APOD administrators. This is a wonderful image, but most screens are in 'landscape' mode, and this image is in 'portrait' mode for no readily apparent reason. Please consider that when there is no real 'up' or 'down', to present the image in 'landscape' mode so that we can vie...
- Mon Mar 08, 2021 11:58 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Three Tails of Comet NEOWISE (2021 Mar 08)
- Replies: 24
- Views: 6265
Re: APOD: Three Tails of Comet NEOWISE (2021 Mar 08)
Just a request to the APOD administrators. This is a wonderful image, but most screens are in 'landscape' mode, and this image is in 'portrait' mode for no readily apparent reason. Please consider that when there is no real 'up' or 'down', to present the image in 'landscape' mode so that we can view...
- Sun Feb 28, 2021 11:07 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mars Perseverance Sol 3 (2021 Feb 26)
- Replies: 9
- Views: 5052
Re: APOD: Mars Perseverance Sol 3 (2021 Feb 26)
The "Stitched together on planet Earth" brings up the panaramic (detailed) view. Quite spectacular once you get it into the full view. https://mars.nasa.gov/resources/25640/mastcam-zs-first-360-degree-panorama/ Eclectic Man: I think the "damage" you are seeing is not damage, but...
- Fri Feb 26, 2021 10:24 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mars Perseverance Sol 3 (2021 Feb 26)
- Replies: 9
- Views: 5052
Re: APOD: Mars Perseverance Sol 3 (2021 Feb 26)
In the detailed view, I noticed that there are a lot of circular black and white 'target' type plaques installed on the upper surfaces of the rover. Towards the top left, there is a coloured sundial, and just above and to the left of that is a plaque which appears to be missing the right-most part o...
- Thu Feb 25, 2021 2:51 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Venus Flyby (2021 Feb 25)
- Replies: 25
- Views: 38241
Re: APOD: A Venus Flyby (2021 Feb 25)
wispr_venus_image.jpg To me the planet looks like a giant waste land! It doesn't look like a planet in the habitable zone! :( And it probably isn't located in the habitable zone, either. We used to think that it was, but I believe that astronomers have had second thoughts. https://www.almanac.com/s...
- Thu Jan 07, 2021 2:17 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Total Solar Eclipse 2020 (2021 Jan 07)
- Replies: 28
- Views: 8348
- Wed Dec 09, 2020 3:10 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Arecibo Telescope Collapse (2020 Dec 09)
- Replies: 45
- Views: 25833
Re: APOD: Arecibo Telescope Collapse (2020 Dec 09)
I wonder if it is now safe for the dish to be dismantled? I expect that several science and engineering museums around the world would like some of it for their exhibitions on both engineering and astronomy. And maybe also the James Bond Museum in Keswick, UK.
The end of an era.
The end of an era.