Search found 443 matches
- Mon Aug 07, 2023 12:35 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Pelican Nebula in Gas, Dust, and... (2023 Aug 07)
- Replies: 11
- Views: 4384
Re: APOD: The Pelican Nebula in Gas, Dust, and... (2023 Aug 07)
This image is mirror reversed.
- Sun Jul 23, 2023 9:57 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Antikythera Mechanism (2023 Jul 23)
- Replies: 10
- Views: 2918
- Sun Jul 02, 2023 3:50 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Milky Way and Aurora over Antarctica (2023 Jul 02)
- Replies: 10
- Views: 2329
- Wed Jun 28, 2023 1:21 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Messier 24: Sagittarius Star Cloud (2023 Jun 28)
- Replies: 8
- Views: 2138
Re: APOD: Messier 24: Sagittarius Star Cloud (2023 Jun 28)
I’ve never seen M24 with this level of clarity before.
- Wed Jun 21, 2023 2:19 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Three Sun Paths (2023 Jun 21)
- Replies: 16
- Views: 7730
Re: APOD: Three Sun Paths (2023 Jun 21)
If the dots are accurate, and I assume they are, then they're a bit of a surprise to me. I thought the path would always look like a part of an ellipse, but the shapes are a bit different than that. Note how the path on the summer solstice, especially, seems to get nearly linear near the horizon. *...
- Sun Jun 11, 2023 6:10 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Sun and Its Missing Colors (2023 Jun 11)
- Replies: 23
- Views: 8022
Re: APOD: The Sun and Its Missing Colors (2023 Jun 11)
You can get a nice yellow by programming red and green just right. (Although pure yellow emitters are now being employed to free up the other color emitters). But mixing red and green via dyes gives brown. There is no such thing as a brown light gel, because brown is a very low amplitude yellow. Pu...
- Sun Jun 04, 2023 3:41 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Color the Universe (2023 Jun 04)
- Replies: 37
- Views: 8978
Re: APOD: Color the Universe (2023 Jun 04)
“Twenty-First Century Regression,” unfortunately. I once met someone who actually believed that scientists had actually accidentally punched through the actual literal firmament, and water started pouring through. He had caught my attention because he was pointing at Jupiter and telling his partner ...
- Fri May 19, 2023 5:03 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Curly Spiral Galaxy M63 (2023 May 19)
- Replies: 16
- Views: 3433
Re: APOD: Curly Spiral Galaxy M63 (2023 May 19)
I’ve never seen a photo of M63 this deep before!
- Tue May 16, 2023 12:58 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Total Eclipse: The Big Corona (2023 May 16)
- Replies: 12
- Views: 3121
Re: APOD: Total Eclipse: The Big Corona (2023 May 16)
The photo even captures the surface features of the Moon.
- Wed May 03, 2023 7:49 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Centaurus A: A Peculiar Island of Stars (2023 May 03)
- Replies: 30
- Views: 6108
Re: APOD: Centaurus A: A Peculiar Island of Stars (2023 May 03)
Aside from Hawking radiation (which is negligible), no matter or light is escaping from the black hole itself. The jets are escaping from the accretion disc surrounding the black hole.orin stepanek wrote: ↑Wed May 03, 2023 6:26 pm If a Black hole lets no mater escape' what are
the jets? Is mater escaping with the jets?
- Wed May 03, 2023 7:42 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Centaurus A: A Peculiar Island of Stars (2023 May 03)
- Replies: 30
- Views: 6108
Re: APOD: Centaurus A: A Peculiar Island of Stars (2023 May 03)
Let’s see...
- Milky Way
- Large Magellanic Cloud
- Small Magellanic Cloud
- M31
- M33
- Centaurus A
- ...
- Wed Apr 26, 2023 2:31 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Northern Lights over Southern Europe (2023 Apr 25)
- Replies: 8
- Views: 4030
Re: APOD: Northern Lights over Southern Europe (2023 Apr 25)
Managed to see it from the Southern UK and get this 2 hour timelapse: [youtube]https://youtu.be/_9M3nIdcJVQ[/youtube] Unfortunately I'd had a couple beers so couldn't drive up to the moors to find a better vantage point. Glad I set up the camera though. You made the right decision, and you got a co...
- Tue Apr 25, 2023 1:00 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Northern Lights over Southern Europe (2023 Apr 25)
- Replies: 8
- Views: 4030
Re: APOD: Northern Lights over Southern Europe (2023 Apr 25)
What about southern lights from northern skies? Come to think of it, I don’t believe I’ve ever seen photos of the aurora australis.APOD Robot wrote: ↑Tue Apr 25, 2023 4:06 am Our unusually active Sun may provide future opportunities to see the northern lights in southern skies.
- Mon Apr 17, 2023 12:40 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: ELVES Lightning over Italy (2023 Apr 17)
- Replies: 4
- Views: 2078
Re: APOD: ELVES Lightning over Italy (2023 Apr 17)
I immediately noticed that the geometry doesn’t work out, so I checked the Wikipedia link. It says that the ring is 360 km in diameter, not radius.APOD Robot wrote: ↑Mon Apr 17, 2023 4:07 am The red ELVES ring pictured had a radius of about 350 km and was captured in late March about 100 kilometers above Ancona, Italy.
- Sat Apr 08, 2023 11:58 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2023 Apr 08)
- Replies: 13
- Views: 3199
Re: APOD: M100: A Grand Design Spiral Galaxy (2023 Apr 08)
Speaking of Judy Schmidt, has anyone heard from her lately?
- Wed Mar 29, 2023 12:05 am
- Forum: Open Space: Discuss Anything
- Topic: Where is Geckzilla?
- Replies: 0
- Views: 2183
Where is Geckzilla?
I haven’t seen her around lately.
- Mon Mar 27, 2023 1:38 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Aurora Over Arctic Henge (2023 Mar 27)
- Replies: 4
- Views: 1830
Re: APOD: Aurora Over Arctic Henge (2023 Mar 27)
I get this configuration for February 27 at 12:30 a.m. GMT.APOD Robot wrote: ↑Mon Mar 27, 2023 4:06 amThe featured image, taken after sunset late last month, looks directly south, ...
- Tue Feb 21, 2023 1:41 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Comet ZTF over Yosemite Falls (2023 Feb 21)
- Replies: 6
- Views: 1798
Re: APOD: Comet ZTF over Yosemite Falls (2023 Feb 21)
So, two bears in this description!APOD Robot wrote: ↑Tue Feb 21, 2023 5:06 am The orange star just over the falls is Kochab. With the exception of a brief encounter with a black bear, ...
- Sun Jan 29, 2023 6:18 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Barnard 68: Dark Molecular Cloud (2023 Jan 29)
- Replies: 17
- Views: 4848
Re: APOD: Barnard 68: Dark Molecular Cloud (2023 Jan 29)
What used to be considered a hole in the sky is now known to astronomers as a dark molecular cloud. A bit of thought shows that it would be prohibitively improbable for it to be a hole in the sky, even if we didn’t have the infrared images. Such a hole would have to be a roughly conical wedge with ...
- Tue Jan 24, 2023 4:27 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: LHS 475 b: Earth-Sized Exoplanet (2023 Jan 24)
- Replies: 21
- Views: 11180
Re: APOD: LHS 475 b: Earth-Sized Exoplanet (2023 Jan 24)
Do AIs know that “red” is relative, and that red dwarfs are more or less the color of incandescent light bulbs? Well, I guess not, if they’re learning from human artists. I have seen very, very few red or yellow stars depicted realistically by human space illustrators. I understand that some artisti...
- Mon Jan 23, 2023 1:10 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Colliding Spiral Galaxies of Arp 274 (2023 Jan 23)
- Replies: 15
- Views: 3489
Re: APOD: The Colliding Spiral Galaxies of Arp 274 (2023 Jan 23)
But as a Color Commentator, I'm somewhat critical of the pink color of the center of the large spiral in Özsaraç's image. In RGB+Hα pictures of galaxies, like today's APOD, the pink color signals high level of hydrogen alpha and high levels of star formation. All the little pink dots that follow th...
- Wed Jan 18, 2023 5:26 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: MACS0647: Gravitational Lensing of... (2023 Jan 18)
- Replies: 31
- Views: 8482
Re: APOD: MACS0647: Gravitational Lensing of... (2023 Jan 18)
A question. In the close-up of JD 3 there is a small totally green galaxy that's even smaller than JD 3 at the bottom right corner. Could this be an even younger galaxy and why is it green? Was it really green, or that it was red shifted to green because of its distance and it was really some other...
- Mon Jan 09, 2023 8:30 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Where Your Elements Came From (2023 Jan 08)
- Replies: 37
- Views: 8381
Re: APOD: Where Your Elements Came From (2023 Jan 08)
The most detailed periodic table I've yet found is the one from https://www.vertex42.com/ExcelTemplates/periodic-table-of-elements.html. There are both PDF and Excel format versions. Here's the color PDF - https://www.vertex42.com/Files/pdfs/2/periodic-table_color.pdf. Note that as of 2012, 114-unu...
- Sun Jan 08, 2023 5:30 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Where Your Elements Came From (2023 Jan 08)
- Replies: 37
- Views: 8381
Re: APOD: Where Your Elements Came From (2023 Jan 08)
There is a more up-to-date image at Wikimedia Commons. For brown, it says “Human synthesis/ no stable isotopes”; however, many of the brown elements in today’s APOD (polonium et al.) do occur in nature in stable quantities, due to radioactive decay chains. These are colored purple in the latest Wiki...
- Sun Jan 01, 2023 5:17 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Largest Rock in our Solar System (2023 Jan 01)
- Replies: 18
- Views: 5531
Re: APOD: The Largest Rock in our Solar System (2023 Jan 01)
Look again at that dot. That’s here. That’s home. That’s us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, e...