Let's say a black hole is a four-dimensional object.
What about its jet?
Search found 948 matches
- Tue May 07, 2024 3:31 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Black Hole Accreting with Jet (2024 May 07)
- Replies: 15
- Views: 412
- Thu Apr 18, 2024 7:03 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Total Eclipse and Comets (2024 Apr 17)
- Replies: 25
- Views: 1201
Re: APOD: Total Eclipse and Comets (2024 Apr 17)
Are you suggesting that the Corona might be markedly different in the portions of it that we can't currently study well (that is, those portions that extend in directions other than in the 2-D radial view we usually see during eclipses)? Possibly? :| Did you notice my edit of my post since your rep...
- Thu Apr 18, 2024 6:02 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Total Eclipse and Comets (2024 Apr 17)
- Replies: 25
- Views: 1201
Re: APOD: Total Eclipse and Comets (2024 Apr 17)
In a two-dimensional image, the corona extends perpendicularly but what of the part that is directed toward or away from us? The actual corona extends in all directions during a “total eclipse” image of the moon. This may entail a SOHO-like orbiter above the sun’s poles following the Cluster missio...
- Thu Apr 18, 2024 5:38 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Total Eclipse and Comets (2024 Apr 17)
- Replies: 25
- Views: 1201
Re: APOD: Total Eclipse and Comets (2024 Apr 17)
In a two-dimensional image, the corona extends perpendicularly but what of the part that is directed toward or away from us? The actual corona extends in all directions during a “total eclipse” image of the moon. This may entail a SOHO-like orbiter above the sun’s poles following the Cluster mission...
- Fri Apr 05, 2024 3:34 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Solar Corona Unwrapped (2024 Apr 05)
- Replies: 21
- Views: 1096
Re: APOD: The Solar Corona Unwrapped (2024 Apr 05)
Can ths be done with a coronagraph image over time, so as to highlight changes in direction and latitude of emissions? To some extent, but no ground-based coronagraph can approach the dynamic range accessible during an eclipse. One tricky point is that what we're seeing here is transient. The Sun i...
- Wed Apr 03, 2024 4:34 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Origin of the Universe
- Replies: 55
- Views: 112549
Re: Origin of the Universe
Consensus is one of the most important parts of science and the scientific method, though. Speculation is for experts. Starting with a conclusion and then cherry picking for evidence that peripherally supports it is not scientific, and is unlikely to lead to accurate understanding. I agree but even...
- Tue Apr 02, 2024 4:39 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Origin of the Universe
- Replies: 55
- Views: 112549
Re: Origin of the Universe
When he proposes it in a peer reviewed journal and supports it with evidence, it will mean something. (He is a student whose research interests are all centered on speculative stuff without evidenciary support, not necessarily even rising the the level of scientific theory.) Speculation is natural ...
- Tue Apr 02, 2024 3:39 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Origin of the Universe
- Replies: 55
- Views: 112549
Re: Origin of the Universe
I read a news: Bruno Bento, researcher at the departament of mathematical scienses at the University of Liverpool, England, states that," perhaps, ( in the Universe), there was not even a beginning" Proposes an infinite past and sees the Big Bang as one more event " in a cosmos that ...
- Fri Mar 29, 2024 3:34 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Colors of Twilight vs. Sunset/Sunrise
- Replies: 28
- Views: 2180
Re: Colors of Twilight vs. Sunset/Sunrise
Thanks for the suggestion, Chris, I didn't think of that! :D 🐐 That's a lovely goat, by the way. What's her name? She looks very feminine to me! :D 👱🏾♀️ Ann Gretel. She'll be kidding in a couple of weeks. Thanks for teaching me a new word, Chris! I only knew one meaning of the word "kidding&q...
- Sun Mar 24, 2024 6:04 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Looking Back at an Eclipsed Earth (2024 Mar 24)
- Replies: 13
- Views: 1022
Re: APOD: Looking Back at an Eclipsed Earth (2024 Mar 24)
Looking back, how would a solar eclipse have appeared millions of years ago? Let’s say during the Eocene . Hard to say but that era had plenty of action here on Earth. Of our extinction events , many had relevance during the epoch . There was a hot time in the old town that night . :roll:
- Sun Mar 17, 2024 2:36 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: What did you see in the sky tonight?
- Replies: 1300
- Views: 1057039
Re: What did you see in the sky tonight?
The conjuction tonight with its beautiful crescent led me back to "The Road to the Snow Moon" from last month. I love finding images you forgot you took. :facepalm: FMI. Is there a possibility that Uranus crept into the conjunction image? IMG_6848.JPG That would be an unexpected surprise....
- Thu Mar 14, 2024 5:05 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: What did you see in the sky tonight?
- Replies: 1300
- Views: 1057039
Re: What did you see in the sky tonight?
The conjuction tonight
with its beautiful crescent
led me back to "The Road to the Snow Moon" from last month.
I love finding images you forgot you took.
- Mon Feb 19, 2024 5:51 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: The Speed of Gravity
- Replies: 2
- Views: 13447
Re: The Speed of Gravity
I was listening to Don Lincoln’s video about Einstein and Newton describing the speed of gravity and he was saying how he, “wished he could have witnessed a debate ”. How might they disagree about gravity's velocity? With AI nowadays, it might actually be simulated. A daunting task I’d like to see ...
- Sat Feb 17, 2024 6:09 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Marzipan destiny?
- Replies: 1
- Views: 3443
Re: Marzipan destiny?
Thorny indeed!
- Sun Feb 11, 2024 6:04 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Shadow of Ingenuity's Rotor... (2024 Feb 10)
- Replies: 28
- Views: 3043
Re: APOD: The Shadow of Ingenuity's Rotor... (2024 Feb 10)
Or both? The " soil" looks like it may have been recently disturbed.johnnydeep wrote: ↑Sat Feb 10, 2024 6:40 pmMore like rotor breaking!Fred the Cat wrote: ↑Sat Feb 10, 2024 5:58 pmUnfortunately, its end was also ground-breaking.Chris Peterson wrote: ↑Sat Feb 10, 2024 5:26 pm
I don't think the communications loss was related to distance.
- Sat Feb 10, 2024 5:58 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Shadow of Ingenuity's Rotor... (2024 Feb 10)
- Replies: 28
- Views: 3043
Re: APOD: The Shadow of Ingenuity's Rotor... (2024 Feb 10)
So, Perseverance was too far away for a direct image but a flight was attempted in which contact was lost and the incident occurred? Does that mean the real cause was a last-ditch effort to get Ingenuity closer? :? It makes me wonder why it so far away that communication was an issue. :| I don't th...
- Sat Feb 10, 2024 5:13 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Shadow of Ingenuity's Rotor... (2024 Feb 10)
- Replies: 28
- Views: 3043
- Thu Feb 08, 2024 6:38 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Globular Star Cluster 47 Tuc (2024 Feb 08)
- Replies: 9
- Views: 1678
Re: APOD: Globular Star Cluster 47 Tuc (2024 Feb 08)
It’s like asking the question, “What came first the chicken or the egg?”
It seems like galaxies may be coops with very old chickens and all their eggs are either fried, hard-boiled, or scrambled.
It seems like galaxies may be coops with very old chickens and all their eggs are either fried, hard-boiled, or scrambled.
- Mon Jan 15, 2024 7:17 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Star Cluster IC 348 from Webb (2024 Jan 15)
- Replies: 13
- Views: 3172
Re: APOD: Star Cluster IC 348 from Webb (2024 Jan 15)
Somehow the description failed to mention the star-forming nature of these filaments . From the Pleiades to galaxies to our Magellanic Clouds , filaments seem to be quite important. JWST investigation seems to be hot on the trail. " Musca " not decided to go into that. :|
- Fri Jan 12, 2024 5:52 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Seeing the nearest stars
- Replies: 9
- Views: 16632
- Sun Jan 07, 2024 6:12 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Cat's Eye Nebula in Optical... (2024 Jan 07)
- Replies: 14
- Views: 19306
Re: APOD: The Cat's Eye Nebula in Optical... (2024 Jan 07)
And to a horticultural guy like me, it begs a question I have never ever considered before: Are celestial phenomenon fragrant? :s Well, the seventh planet certainly has a reputation... :P And it's still waiting for that cosmic bidet... I find it illuminating that jets may arise from different astro...
- Fri Jan 05, 2024 5:51 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Seeing the nearest stars
- Replies: 9
- Views: 16632
Re: Seeing the nearest stars
Besides molecular biosignatures , detecting generated light seems an obvious method of finding advanced civilizations. Since we have a giant telescope that detects IR , could it help find heat generation of an alien nature? Probably not campfires of alien neanderthals :no: but ET’s may need to stay ...
- Wed Dec 20, 2023 5:50 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: NGC 1499: The California Nebula (2023 Dec 19)
- Replies: 8
- Views: 5400
Re: APOD: NGC 1499: The California Nebula (2023 Dec 19)
Are there any estimates of the mass or average density of the California Nebula, and the average density of its surrounding medium? The mass is probably that of several tens of Suns. The density is that of a very hard vacuum. And no doubt, the density of the surrounding medium is less dense still! ...
- Sun Nov 19, 2023 5:07 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Space Station, Solar Prominences, Sun (2023 Nov 19)
- Replies: 12
- Views: 11854
Re: APOD: Space Station, Solar Prominences, Sun (2023 Nov 19)
If ISS’s solar panels were as close to the sun as it appears, they’d be pumping out some juice. Parker’s don’t need to be that big most of the time.
But the AC would really need to be cranked up.
But the AC would really need to be cranked up.
- Sun Nov 12, 2023 3:25 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Gibbous Moon beyond Swedish Mountain (2023 Nov 12)
- Replies: 7
- Views: 11579
Re: APOD: Gibbous Moon beyond Swedish Mountain (2023 Nov 12)
The moon is so photogenic. I love to image it this time of year as it rises further north. IMG_6614.JPG A friend was out with his new dog Sadie when he noticed last week's Moon-Venus in conjunction with a photobomber. Moon Venus and Byron.jpeg Unfortunately not all images portray the scene realistic...