Search found 2883 matches
- Fri May 03, 2024 10:07 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Temperatures on Exoplanet WASP-43b (2024 May 03)
- Replies: 25
- Views: 457
Re: APOD: Temperatures on Exoplanet WASP-43b (2024 May 03)
I find it interesting that the trailing side is slightly hotter than the leading side. That's what I was wondering. If the planet was rocky, I suppose the temp would be similar to it's present state, except that it would take longer to go from sun-side to dark-side? But that is I guess a moot point...
- Fri May 03, 2024 10:06 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Temperatures on Exoplanet WASP-43b (2024 May 03)
- Replies: 25
- Views: 457
Re: APOD: Temperatures on Exoplanet WASP-43b (2024 May 03)
The last link says the winds are 5,000 mph!wilddouglascounty wrote: ↑Fri May 03, 2024 8:03 pm Seems like the winds must be unreal on such a system, and judging from the heat retention, the atmosphere pretty darn thick. It would be interesting for someone to make a stab at modeling such extreme conditions!
- Fri May 03, 2024 7:46 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
- Replies: 31
- Views: 646
Re: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
I just told you that I don't necessarily always trust Wikipedia, but now I'm going to quote Wikipedia anyway to back up my claim that there are two bars in NGC 1365: And I can see the bars of NGC 1365. :wink: Ann Is there even a definition of a "bar" based on something other than mere app...
- Fri May 03, 2024 3:19 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
- Replies: 31
- Views: 646
Re: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
I just told you that I don't necessarily always trust Wikipedia, but now I'm going to quote Wikipedia anyway to back up my claim that there are two bars in NGC 1365: And I can see the bars of NGC 1365. :wink: Ann Is there even a definition of a "bar" based on something other than mere app...
- Fri May 03, 2024 2:17 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
- Replies: 31
- Views: 646
Re: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
Still not much of a definitive bar in M61 at all compared to your other examples. And I'm not convinced of the "inner" bar in NGC 1365 either! "A bar is in the eye of the beholder" it seems. I just told you that I don't necessarily always trust Wikipedia, but now I'm going to qu...
- Fri May 03, 2024 11:46 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
- Replies: 31
- Views: 646
Re: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
Let's look at a truly barred galaxy, M61: Wikipedia thinks M61 is an intermediate barred spiral: Messier 61 (also known as M61, NGC 4303, or the Swelling Spiral Galaxy) is an intermediate barred spiral galaxy in the Virgo Cluster of galaxies. It was first discovered by Barnaba Oriani on May 5, 1779...
- Thu May 02, 2024 9:09 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
- Replies: 31
- Views: 646
Re: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
Let's look at a truly barred galaxy, M61: Wikipedia thinks M61 is an intermediate barred spiral: Messier 61 (also known as M61, NGC 4303, or the Swelling Spiral Galaxy) is an intermediate barred spiral galaxy in the Virgo Cluster of galaxies. It was first discovered by Barnaba Oriani on May 5, 1779...
- Thu May 02, 2024 4:39 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
- Replies: 31
- Views: 646
Re: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
Sadly, this "One of the brightest members of the Virgo Cluster of galaxies, M100, also known as NGC 4321" is not even shown at the Virgo Cluster APOD link:
- Thu May 02, 2024 3:10 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: IC 1795: The Fishhead Nebula (2024 May 01)
- Replies: 24
- Views: 586
Re: APOD: IC 1795: The Fishhead Nebula (2024 May 01)
Well, yes... not really an option with most astronomical objects, though! Angular sizes are usually only given when they are interesting in their own right for some reason (like if an object is the apparent size of the Moon). But they are always easily determined in any image with more than a handf...
- Thu May 02, 2024 1:26 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
- Replies: 31
- Views: 646
Re: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
Thank you very much. Extremely honored again. 🙏🏼 I am blessed with Bortle 2 skies in Northern Arizona. -Drew https://www.astrobin.com/users/DrewJEvans/ https://NAZObservatory.com Excellent work! Can I ask how many hours did you spend creating this picture in total? The link to the author's Astrobin...
- Thu May 02, 2024 1:15 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: IC 1795: The Fishhead Nebula (2024 May 01)
- Replies: 24
- Views: 586
Re: APOD: IC 1795: The Fishhead Nebula (2024 May 01)
But in order to determine that the snowman is 2 meters high, we need to know our distance from it and the angle it subtends at that distance. Likewise for the nebula. ... I was declaring the Snowman's height, not estimating. Well, yes... not really an option with most astronomical objects, though! ...
- Wed May 01, 2024 5:44 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: IC 1795: The Fishhead Nebula (2024 May 01)
- Replies: 24
- Views: 586
Re: APOD: IC 1795: The Fishhead Nebula (2024 May 01)
Just wanted to note that there are two possible right angle triangles that could be used to determine the distance and angle, but at the large distances typically involved, they are almost the same. I had always assumed that we were using the smaller ɑ angle, but it's really the slightly larger angl...
- Wed May 01, 2024 4:59 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: IC 1795: The Fishhead Nebula (2024 May 01)
- Replies: 24
- Views: 586
Re: APOD: IC 1795: The Fishhead Nebula (2024 May 01)
In context from a wider field of view image at one of the links in the text:
- Tue Apr 30, 2024 9:31 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: GK Per: Nova and Planetary Nebula (2024 Apr 30)
- Replies: 16
- Views: 712
Re: APOD: GK Per: Nova and Planetary Nebula (2024 Apr 30)
Not so with supernovas. And it's fascinating to think that supernovas type Ia form in much the same way as cataclysmic novas like GK Per. The difference is that so much matter builds up on the white dwarf's surface that the white dwarf reaches its Chandrasekhar limit, the maximum mass of a white dw...
- Tue Apr 30, 2024 6:31 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: GK Per: Nova and Planetary Nebula (2024 Apr 30)
- Replies: 16
- Views: 712
Re: APOD: GK Per: Nova and Planetary Nebula (2024 Apr 30)
Sort of. Here's a succession of images taken over the years that demonstrate the growth: https://vimeo.com/31120259mason dixon wrote: ↑Tue Apr 30, 2024 6:19 pm Is there a timelapse of the Firework nebula growing in size like the Crab nebula?
- Tue Apr 30, 2024 1:09 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: GK Per: Nova and Planetary Nebula (2024 Apr 30)
- Replies: 16
- Views: 712
Re: APOD: GK Per: Nova and Planetary Nebula (2024 Apr 30)
Not so with supernovas. And it's fascinating to think that supernovas type Ia form in much the same way as cataclysmic novas like GK Per. The difference is that so much matter builds up on the white dwarf's surface that the white dwarf reaches its Chandrasekhar limit, the maximum mass of a white dw...
- Mon Apr 29, 2024 10:35 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Rings Around the Ring Nebula (2024 Apr 28)
- Replies: 15
- Views: 571
Re: APOD: Rings Around the Ring Nebula (2024 Apr 28)
Ok, agreed. The Sun would be merely senescent, but not yet entirely dead! 😊 Maybe these stars are quite comfortable in anticipation; a ripening chrysalis perhaps. The ripening is only beginning, give them a quadrillion years and white dwarfs apparently turn into giant diamonds! Which of course are ...
- Mon Apr 29, 2024 9:35 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: All Sky Moon Shadow (2024 Apr 27)
- Replies: 16
- Views: 479
Re: APOD: All Sky Moon Shadow (2024 Apr 27)
Very hard to tell.Rauf wrote: ↑Mon Apr 29, 2024 7:26 pmI wonder if that flag is lying on the ground or is it standing.
- Mon Apr 29, 2024 5:05 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Comet, Planet, Moon (2024 Apr 29)
- Replies: 4
- Views: 296
Re: APOD: Comet, Planet, Moon (2024 Apr 29)
Ok, where is this "stubby" dust tail on the right? If it really is visible here, I find it difficult to distinguish it from the impressive vertical ion tail!
- Mon Apr 29, 2024 3:12 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: All Sky Moon Shadow (2024 Apr 27)
- Replies: 16
- Views: 479
Re: APOD: All Sky Moon Shadow (2024 Apr 27)
Thanks. Indeed it must be. I didn't even notice it!Rauf wrote: ↑Mon Apr 29, 2024 5:24 am20240408h14crop.jpgjohnnydeep wrote: ↑Sun Apr 28, 2024 1:18 pmWhere is this Turkish flag you’re referring to?wilddouglascounty wrote: ↑Sun Apr 28, 2024 2:36 am
So is he from Turkey? That's the Turkey flag, right?
I think this is the Turkish flag they are referring to.
- Mon Apr 29, 2024 3:08 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Regulus and the Dwarf Galaxy (2024 Apr 26)
- Replies: 18
- Views: 789
Re: APOD: Regulus and the Dwarf Galaxy (2024 Apr 26)
The HR diagram of the Milky Way..jpgThe HR diagram of the Milky Way-.jpg https://asterisk.apod.com/download/file.php?id=49545&mode=view Cool! Nice work. Well I am not sure. Maybe fitting the temperature scales is better The HR diagram of the Milky Way-3.jpgThe HR diagram of the Milky Way-4.jpg ...
- Sun Apr 28, 2024 6:45 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Regulus and the Dwarf Galaxy (2024 Apr 26)
- Replies: 18
- Views: 789
Re: APOD: Regulus and the Dwarf Galaxy (2024 Apr 26)
... Galaxies and globular clusters contain different types of stars. Ann Exactly. Which reasonably suggests that they have entirely different formation processes. The HR diagram of the Milky Way..jpgThe HR diagram of the Milky Way-.jpg https://asterisk.apod.com/download/file.php?id=49545&mode=v...
- Sun Apr 28, 2024 4:14 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Rings Around the Ring Nebula (2024 Apr 28)
- Replies: 15
- Views: 571
Re: APOD: Rings Around the Ring Nebula (2024 Apr 28)
So, something similar will likely be the fate of our own Sun, correct? From the link - Planetary Nebulae Planetary nebulae (PN) represent the last stages of evolution for low- and intermediate-mass stars whose Main Sequence mass was less than about 8 solar masses. After evolving through the Asympto...
- Sun Apr 28, 2024 4:07 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Rings Around the Ring Nebula (2024 Apr 28)
- Replies: 15
- Views: 571
Re: APOD: Rings Around the Ring Nebula (2024 Apr 28)
So, something similar will likely be the fate of our own Sun, correct? From the link - Planetary Nebulae Planetary nebulae (PN) represent the last stages of evolution for low- and intermediate-mass stars whose Main Sequence mass was less than about 8 solar masses. After evolving through the Asymptot...
- Sun Apr 28, 2024 1:18 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: All Sky Moon Shadow (2024 Apr 27)
- Replies: 16
- Views: 479
Re: APOD: All Sky Moon Shadow (2024 Apr 27)
Probably not near center, but Cassiopeia should be in the picture. I definitely couldn't spot the familiar W. Ann Cassiopeia is in the picture. Look at the annotated version mentioned in the explanation. The image is a another masterpiece by Tunç Tezel. APOD should be able to spell his name correct...