Search found 221 matches
- Sat Jun 01, 2024 7:49 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Nebulous Realm of WR 134 (2024 May 31)
- Replies: 28
- Views: 958
Re: APOD: The Nebulous Realm of WR 134 (2024 May 31)
Given that something like 85% of high mass stars are part of binary systems, maybe the question to ask is why only 50% of WR stars are binaries? OK, so I ask: Why 85% of high mass stars are part of binary systems? One answer probably has to do with the formation process of high-mass stars. https://...
- Fri May 31, 2024 2:10 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Nebulous Realm of WR 134 (2024 May 31)
- Replies: 28
- Views: 958
Re: APOD: The Nebulous Realm of WR 134 (2024 May 31)
It is estimated that about 50% of Wolf-Rayet stars occur in binary systems. Proposed companions are another Wolf-Rayet star, or a compact companion such as a black hole or neutron star. There is some evidence for both of these scenarios, but conclusive observations have yet to be obtained. The only...
- Fri May 31, 2024 1:59 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Nebulous Realm of WR 134 (2024 May 31)
- Replies: 28
- Views: 958
Re: APOD: The Nebulous Realm of WR 134 (2024 May 31)
It is estimated that about 50% of Wolf-Rayet stars occur in binary systems. Proposed companions are another Wolf-Rayet star, or a compact companion such as a black hole or neutron star. There is some evidence for both of these scenarios, but conclusive observations have yet to be obtained. The only...
- Tue May 28, 2024 7:57 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Solar X Flare as Famous Active... (2024 May 28)
- Replies: 16
- Views: 834
Re: APOD: Solar X Flare as Famous Active... (2024 May 28)
Well, it's not so blank now!JimB wrote: ↑Tue May 28, 2024 7:55 amIt's not just you. Todays APOD is completely blank - really is "open space"Rauf wrote: ↑Tue May 28, 2024 7:18 am Is it just me, or is the main APOD link (https://apod.nasa.gov/apod/astropix.html) not working today?
- Tue May 28, 2024 7:18 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Solar X Flare as Famous Active... (2024 May 28)
- Replies: 16
- Views: 834
Re: APOD: Solar X Flare as Famous Active... (2024 May 28)
Is it just me, or is the main APOD link (https://apod.nasa.gov/apod/astropix.html) not working today?
- Sat May 25, 2024 6:04 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Manicouagan Impact Crater from Space (2024 May 25)
- Replies: 14
- Views: 925
Re: APOD: Manicouagan Impact Crater from Space (2024 May 25)
April 11? Which one? I guess the one in 2019?APOD Robot wrote: ↑Sat May 25, 2024 4:07 am Orbiting 400 kilometers above Quebec, Canada, planet Earth, the International Space Station Expedition 59 crew captured this snapshot of the broad St. Lawrence River and curiously circular Lake Manicouagan on April 11.
- Mon May 20, 2024 4:54 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Aurora Dome Sky (2024 May 20)
- Replies: 4
- Views: 389
Re: APOD: Aurora Dome Sky (2024 May 20)
But I can still see those wires!APOD Robot wrote: ↑Mon May 20, 2024 4:06 am and processed to heighten the colors and remove electrical wires.
- Mon May 13, 2024 6:18 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: AR 3664 on a Setting Sun (2024 May 13)
- Replies: 17
- Views: 694
Re: APOD: AR 3664 on a Setting Sun (2024 May 13)
Yeah, I see it's now fixed
- Mon May 13, 2024 8:10 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: AR 3664 on a Setting Sun (2024 May 13)
- Replies: 17
- Views: 694
Re: APOD: AR 3664 on a Setting Sun (2024 May 13)
So is it 3664 or 6443?
- Sun May 12, 2024 4:35 am
- Forum: Open Space: Discuss Anything
- Topic: Weather!
- Replies: 2868
- Views: 1038460
Re: Weather!
In the big picture, no species can evolve for long if the old versions aren't eliminated. You need reproduction for adaptation and evolution, and you can't have reproduction without death in any system with limited resources. OK, let's say that hypothetically, some genetic mutations have made it po...
- Sat May 11, 2024 6:13 pm
- Forum: Open Space: Discuss Anything
- Topic: Weather!
- Replies: 2868
- Views: 1038460
Re: Weather!
DNA gets damaged over time, toxins accumulate over time. Some pest, parasite, or disease will eventually win. And evolution doesn't favor organisms that don't die and make room for future generations. How can evolution favor an organism's death? In the big picture, no species can evolve for long if...
- Sat May 11, 2024 6:05 pm
- Forum: Open Space: Discuss Anything
- Topic: Weather!
- Replies: 2868
- Views: 1038460
Re: Weather!
Well, they have a lifespan of a few hundred years, depending on conditions. Maybe it will be there for another 200. But not forever. Yes, but why a tree can't live forever? I mean, some have been living for more than a millennia. Why this tree can't live that long? DNA gets damaged over time, toxin...
- Fri May 10, 2024 9:40 am
- Forum: Open Space: Discuss Anything
- Topic: Weather!
- Replies: 2868
- Views: 1038460
Re: Weather!
Originally from that neck of the woods , I was curious too. :thumb_up: Thanks! Btw, it mentions that "based on its species and history, it will probably be there for another 100 years." Why 100 years? What will happen after that? Well, they have a lifespan of a few hundred years, dependin...
- Fri May 10, 2024 9:39 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Simulation: Two Black Holes Merge (2024 May 10)
- Replies: 21
- Views: 999
Re: APOD: Simulation: Two Black Holes Merge (2024 May 10)
According to the mathematics that I learned, 36 + 31 = 67, which is 4 (four) more than 63, not 3 more. Of course, this could easily be a matter of rounding issues. But then, if the actual figures were known with greater precision, it would have been quite possible to supply those numbers instead of...
- Thu May 09, 2024 3:49 pm
- Forum: Open Space: Discuss Anything
- Topic: Weather!
- Replies: 2868
- Views: 1038460
Re: Weather!
I went to a concert in Portland a couple of months ago. Walking from the parking space I walked past a large tree and noticed this plaque in front of it: PXL_20240211_205553559 (1).jpg The city has grown all around the tree; it's flourished and become quite large. Which is pretty neat...nice work, ...
- Thu May 09, 2024 10:53 am
- Forum: Open Space: Discuss Anything
- Topic: Weather!
- Replies: 2868
- Views: 1038460
Re: Weather!
I went to a concert in Portland a couple of months ago. Walking from the parking space I walked past a large tree and noticed this plaque in front of it: PXL_20240211_205553559 (1).jpg The city has grown all around the tree; it's flourished and become quite large. Which is pretty neat...nice work, ...
- Sun May 05, 2024 6:36 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Black Hole Disrupts a Passing Star (2024 May 05)
- Replies: 29
- Views: 1033
Re: APOD: A Black Hole Disrupts a Passing Star (2024 May 05)
I fear this is another "artist's representation" that is not very connected to reality. So what needs to change in order to make it more realistic? Here's another picture that I like a lot better: https://asterisk.apod.com/download/file.php?id=49622&t=1 Tidal disruption of star near b...
- Sun May 05, 2024 6:44 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Black Hole Disrupts a Passing Star (2024 May 05)
- Replies: 29
- Views: 1033
Re: APOD: A Black Hole Disrupts a Passing Star (2024 May 05)
Okay, cool, but... https://apod.nasa.gov/apod/image/2405/BhShredder_NASA_1080.jpg APOD 5 May 2024 annotated.png Can anyone answer my questions? Ann I fear this is another "artist's representation" that is not very connected to reality. So what needs to change in order to make it more real...
- Fri May 03, 2024 7:28 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Temperatures on Exoplanet WASP-43b (2024 May 03)
- Replies: 25
- Views: 895
Re: APOD: Temperatures on Exoplanet WASP-43b (2024 May 03)
Waiting for May the fourth APOD
- Thu May 02, 2024 4:33 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
- Replies: 34
- Views: 1892
Re: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
Thank you! 21 hours to be precise. https://www.astrobin.com/hzakye/ I see! But how many hours did the processing take? It can't be 21 hours for the entire effort, right? Data acquisition was 21 hours. Processing was done in APP and Pixinsight, not much over an hour. Wow. I thought it takes longer t...
- Thu May 02, 2024 4:21 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
- Replies: 34
- Views: 1892
Re: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
I see! But how many hours did the processing take? It can't be 21 hours for the entire effort, right?Guest wrote: ↑Thu May 02, 2024 3:30 pmThank you! 21 hours to be precise.
https://www.astrobin.com/hzakye/
- Thu May 02, 2024 11:52 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
- Replies: 34
- Views: 1892
Re: APOD: M100: A Grand Design Spiral Galaxy (2024 May 02)
Excellent work!DJE44 wrote: ↑Thu May 02, 2024 4:53 am 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
Can I ask how many hours did you spend creating this picture in total?
- Mon Apr 29, 2024 7:26 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: All Sky Moon Shadow (2024 Apr 27)
- Replies: 20
- Views: 1441
Re: APOD: All Sky Moon Shadow (2024 Apr 27)
I wonder if that flag is lying on the ground or is it standing.johnnydeep wrote: ↑Mon Apr 29, 2024 3:12 pmThanks. Indeed it must be. I didn't even notice it!
- Mon Apr 29, 2024 5:24 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: All Sky Moon Shadow (2024 Apr 27)
- Replies: 20
- Views: 1441
Re: APOD: All Sky Moon Shadow (2024 Apr 27)
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 correctly. Holger So is he from Turkey? That's the Turkey flag, right? Where is this Turkish flag you’re referring to? 20...
- Sat Apr 27, 2024 11:47 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: All Sky Moon Shadow (2024 Apr 27)
- Replies: 20
- Views: 1441
Re: APOD: All Sky Moon Shadow (2024 Apr 27)
Is that Cassiopeia's W near center? 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 shou...