Search found 18398 matches
- Mon Feb 07, 2022 5:30 am
- Forum: The Communications Center: Breaking Science News
- Topic: SISSA: Black Holes? They Are Like a Hologram
- Replies: 1
- Views: 1359
Re: SISSA: Black Holes? They Are Like a Hologram
Black Holes? They Are Like a Hologram International School of Advanced Studies (SISSA) | 2020 Jun 03 Spherical, smooth and simple according to the theory of relativity, or extremely complex and full of information as, according to quantum laws, Stephen Hawking used to say? There is no single answer...
- Sat Feb 05, 2022 10:21 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Symbiotic R Aquarii (2022 Feb 05)
- Replies: 21
- Views: 10423
Re: APOD: Symbiotic R Aquarii (2022 Feb 05)
Here's a question about the JWST. So, it's in a halo orbit around L2 and this incredible telescope stays on the far side of its sunshield. How much range of movement does it have for pointing? I guess that scheduling observation of a given target in deep space is restricted to certain times of year...
- Sat Feb 05, 2022 7:58 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Symbiotic R Aquarii (2022 Feb 05)
- Replies: 21
- Views: 10423
Re: APOD: Symbiotic R Aquarii (2022 Feb 05)
You don't see the cowboy under the hat
- Sat Feb 05, 2022 3:33 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moons at Twilight (2022 Feb 04)
- Replies: 12
- Views: 6840
Re: APOD: Moons at Twilight (2022 Feb 04)
<<Moonfall is a 2022 science fiction disaster film co-written, directed, and co-produced by Roland Emmerich. The film was shot in Montreal on a $146 million production budget, making it one of the most expensive independently produced films of all-time. Moonfall was released in the United States on...
- Fri Feb 04, 2022 5:45 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Galactic Center in Radio from... (2022 Feb 02)
- Replies: 24
- Views: 9319
Re: APOD: The Galactic Center in Radio from... (2022 Feb 02)
https://upload.wikimedia.org/wikipedia/commons/b/b3/SgrAWest_BEAR.jpg I struggle to fit the two pictures. The posted 2° wide MeerKAT image is 200 times wider and Sgr A spot in that panorama is too bright anyhow to see any details. It certainly doesn't help that the :arrow: "Surface brightness ...
- Fri Feb 04, 2022 5:30 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moons at Twilight (2022 Feb 04)
- Replies: 12
- Views: 6840
Re: APOD: Moons at Twilight (2022 Feb 04)
[ORANGE] poet malicious delay.
I[O] Eu[R]opa [GAN]ym[E]de Callisto.
I[O] Eu[R]opa [GAN]ym[E]de Callisto.
- Fri Feb 04, 2022 3:06 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Galactic Center in Radio from... (2022 Feb 02)
- Replies: 24
- Views: 9319
Re: APOD: The Galactic Center in Radio from... (2022 Feb 02)
https://www.sarao.ac.za/wp-content/uploads/2022/01/03_MeerKAT_GC_SgrA_and_Bubble-1500x844.jpg If you ask me, a supernova remnant that appears to be located close to the center of our galaxy - so that it can be clearly seen in an infrared, radio or X-ray image that portrays the center of our galaxy ...
- Fri Feb 04, 2022 2:29 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Embraced by Sunlight (2022 Feb 03)
- Replies: 6
- Views: 5472
Re: APOD: Embraced by Sunlight (2022 Feb 03)
In these two images, though both Venus and the Moon are nominally illuminated in the same percentage of their Earth-facing hemispheres, the cusps of Venus appear to extend further toward the north and south extremes than those of Luna do. This is not an illusion. Venus has an upper layer of thin cl...
- Thu Feb 03, 2022 9:55 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Carina Nebula North (2022 Jan 31)
- Replies: 12
- Views: 4976
Re: APOD: Carina Nebula North (2022 Jan 31)
Click to play embedded YouTube video.
Click to play embedded YouTube video.
Click to play embedded YouTube video.
- Wed Feb 02, 2022 2:23 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moon Phases 2022 (2022 Feb 01)
- Replies: 8
- Views: 4974
Re: APOD: Moon Phases 2022 (2022 Feb 01)
https://upload.wikimedia.org/wikipedia/commons/a/a0/CardThisIsTheLife.jpg Quite hypnotic to watch. Really let's you appreciate the libration and size fluctuations. What a complex pas de deux the Earth and Moon have! Though in this case, both are female: Mother Earth and her daughter Selene/Luna! A ...
- Tue Feb 01, 2022 4:53 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moon Phases 2022 (2022 Feb 01)
- Replies: 8
- Views: 4974
Re: APOD: Moon Phases 2022 (2022 Feb 01)
Click to play embedded YouTube video.
- Mon Jan 31, 2022 1:27 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Solar Prominence from SOHO (2022 Jan 30)
- Replies: 12
- Views: 4924
Re: APOD: A Solar Prominence from SOHO (2022 Jan 30)
Interesting that the sun goes into a 11 year cycle! Does this show the stability of the Sun?⁉️ If you're really looking at the underlying theory (including its relevance to solar stability) you need to consider that it's actually a 22 year cycle. The 11-year cycle is actually a half cycle, as the S...
- Sun Jan 30, 2022 10:35 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Fornax Cluster of Galaxies (2022 Jan 29)
- Replies: 16
- Views: 5210
Re: APOD: The Fornax Cluster of Galaxies (2022 Jan 29)
As the grand structure of the universe goes, what would be the order of things? Cosmic background radiation>filaments and voids>super clusters>clusters>local group>Milky Way>solar system. It’s hard to organize these in my mind at the scale they are represented. You kind of went from generic to spec...
- Sat Jan 29, 2022 2:53 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Western Moon, Eastern Sea (2022 Jan 28)
- Replies: 10
- Views: 5462
Re: APOD: Western Moon, Eastern Sea (2022 Jan 28)
In case anyone is interested, when I first published this data back in early December I created a Lambert equal area cylindrical projection of the image featured in today's APOD. Shown below is a cropped portion of this projection, showing the regions referenced in the posts above. The main mare ba...
- Sat Jan 29, 2022 2:41 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: South of Orion (2022 Jan 27)
- Replies: 30
- Views: 12476
Re: APOD: South of Orion (2022 Jan 27)
So... it was clear to you both from the Hubble image alone that this was never a Bok globule (and, presumably, that Herschel PACS far-IR 70 & 160mum maps, APEX LABOCA & SABOCA submillimeter continuum maps, and Magellan PANIC near-IR images were a waste of time) :?: It was clear to me. And i...
- Fri Jan 28, 2022 10:42 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: South of Orion (2022 Jan 27)
- Replies: 30
- Views: 12476
Re: APOD: South of Orion (2022 Jan 27)
With Ann and Peterson sparing, one can only conclude that this discussion is one for the ages. But we're not. We're in agreement. Indeed.... for you wrote: I'm mainly responding to her claim "It is so clear from the Hubble image that NGC 1999 is a cavity." I guess that is subject to inter...
- Fri Jan 28, 2022 7:45 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: South of Orion (2022 Jan 27)
- Replies: 30
- Views: 12476
Re: APOD: South of Orion (2022 Jan 27)
With Ann and Peterson sparing, one can only conclude that this discussion is one for the ages. spare (v.) Old English sparian "to refrain from harming, be indulgent to, allow to go free; use sparingly," from the source of Old English spær "sparing, frugal," from Proto-Germanic *...
- Fri Jan 28, 2022 7:26 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Western Moon, Eastern Sea (2022 Jan 28)
- Replies: 10
- Views: 5462
Re: APOD: Western Moon, Eastern Sea (2022 Jan 28)
What caused the Square corners? What square corners? https://upload.wikimedia.org/wikipedia/commons/0/08/Lacus-autumni-clem1.jpg https://upload.wikimedia.org/wikipedia/commons/c/cb/Triple-Goddess-Waxing-Full-Waning-Symbol.svg <<Lacus Autumni (Latin autumnī, "Lake of Autumn") is a region o...
- Fri Jan 28, 2022 2:21 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: James Webb Space Telescope (JWST)
- Replies: 104
- Views: 90844
Re: James Webb Space Telescope (JWST)
Click to play embedded YouTube video.
- Fri Jan 28, 2022 1:55 pm
- Forum: The Communications Center: Breaking Science News
- Topic: "Spooky" Spinning Object In Milky Way
- Replies: 1
- Views: 1806
- Thu Jan 27, 2022 6:40 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: South of Orion (2022 Jan 27)
- Replies: 30
- Views: 12476
Re: APOD: South of Orion (2022 Jan 27)
Ann was misled by the caption of the Wikipedia image in Wikimedia Commons that, as it should, cites the original HHT caption? The text on the Wikipedia, on the other hand, was corrected to refer to a hole on 16 May 2010, according to the page edit history. And Chris perhaps did not notice that Ann ...
- Thu Jan 27, 2022 6:22 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: South of Orion (2022 Jan 27)
- Replies: 30
- Views: 12476
Re: APOD: South of Orion (2022 Jan 27)
https://www.youtube.com/watch?v=rQ-uzCC3hjQ Ann was misled by the caption of the Wikipedia image in Wikimedia Commons that, as it should, cites the original HHT caption? The text on the Wikipedia, on the other hand, was corrected to refer to a hole on 16 May 2010, according to the page edit history...
- Thu Jan 27, 2022 5:40 pm
- Forum: Open Space: Discuss Anything
- Topic: Weather!
- Replies: 2868
- Views: 996887
Re: Weather!
Click to play embedded YouTube video.
- Thu Jan 27, 2022 2:03 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: South of Orion (2022 Jan 27)
- Replies: 30
- Views: 12476
Re: APOD: South of Orion (2022 Jan 27)
It is so clear from the Hubble image that NGC 1999 is a cavity. The incredible void in it makes it a unique object, at least among objects so far catalogued by astronomers. Imagine the jet that punched through the rather thick nebula here and left this T-shaped scar! This "black hole", or...
- Wed Jan 26, 2022 10:41 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Stars, Dust, and Gas Near Antares (2022 Jan 26)
- Replies: 10
- Views: 3885
Re: APOD: Stars, Dust, and Gas Near Antares (2022 Jan 26)
1) The yellow Antares reflection nebula. Antares is, despite being called a red supergiant, not actually a red star. Its B-V index is around +1.9, which makes it a yellow-orange star. (If you want a redder star, check out Mu Cephei , with a B-V index of cirka +2.2, or, better yet, carbon star T Lyr...