Search found 198 matches
- Fri Jan 31, 2020 2:38 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Goldilocks Zones and Stars (2020 Jan 31)
- Replies: 24
- Views: 9229
Re: APOD: Goldilocks Zones and Stars (2020 Jan 31)
Well, there goes my plans for a vacation home orbiting Proxima Centauri!
- Thu Jan 23, 2020 3:46 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Globular Star Cluster NGC 6752 (2020 Jan 23)
- Replies: 17
- Views: 4346
Re: APOD: Globular Star Cluster NGC 6752 (2020 Jan 23)
I wonder what the night (?) sky would look like to an imaginary resident of a planet circling one of those stars in that cluster. Regards, Bill Lee I've asked a similar (the same?) question recently, and the answer was something like; Night sky would be as bright as a night with a full Moon, withou...
- Thu Jan 23, 2020 2:29 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Globular Star Cluster NGC 6752 (2020 Jan 23)
- Replies: 17
- Views: 4346
- Tue Jan 14, 2020 8:29 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perihelion to Aphelion (2020 Jan 09)
- Replies: 30
- Views: 9701
Re: APOD: Perihelion to Aphelion (2020 Jan 09)
neufer,
Was it GOES-5 that had "its lights burn out"?
I recall meteorologists (early 1990's) referring to a GOES satellite lost its IR capability because a carousel of Infrared lamps (needed to calibrate the camera?) used up all of its lamps.
Was it GOES-5 that had "its lights burn out"?
I recall meteorologists (early 1990's) referring to a GOES satellite lost its IR capability because a carousel of Infrared lamps (needed to calibrate the camera?) used up all of its lamps.
- Tue Jan 14, 2020 4:00 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perihelion to Aphelion (2020 Jan 09)
- Replies: 30
- Views: 9701
Re: APOD: Perihelion to Aphelion (2020 Jan 09)
Thanks again, neufer!
How are things in Tralfamadore?
(Not, how were things in Tralfamadore, or how will things be in Tralfamadore.)
B^)
How are things in Tralfamadore?
(Not, how were things in Tralfamadore, or how will things be in Tralfamadore.)
B^)
- Tue Jan 14, 2020 3:15 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perihelion to Aphelion (2020 Jan 09)
- Replies: 30
- Views: 9701
Re: APOD: Perihelion to Aphelion (2020 Jan 09)
Okay, After thinking about my previous response to neufer's response to my analemma/latest sunrise/earliest sunset question, and Chris Peterson's diagram of the Earth's elliptical orbit, I was wrong to think the elliptical orbit was responsible for the latest sunrise/earliest sunset question. The 23...
- Thu Jan 09, 2020 7:24 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perihelion to Aphelion (2020 Jan 09)
- Replies: 30
- Views: 9701
Re: APOD: Perihelion to Aphelion (2020 Jan 09)
Thanks neufer! The maths are difficult for me, but the pictures help explain it. So... the "larger loop" is because of axis angle, the asymmetry of sunrise/sunset* is due to the elliptical orbit. (I didn't know the asymmetry of of the sunset was not equally "distant" from the sol...
- Thu Jan 09, 2020 2:51 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Galaxies in the River (2020 Jan 08)
- Replies: 13
- Views: 4372
Re: Pro & confluences
I think this metaphor of "eating" for the process is quite strained and is being imposed onto this process by a competitive biological creature. Interesting that the name of the constellation is the river . When 2 rivers join, we don't really think of one as absorbing the other. They merg...
- Thu Jan 09, 2020 2:45 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Tumultuous Clouds of Jupiter (2020 Jan 06)
- Replies: 28
- Views: 7619
Re: APOD: Tumultuous Clouds of Jupiter (2020 Jan 06)
"It's just a bleedin' lil' bunny!"
- Monty Pythons "Holy Grail" upon seeing the Rabbit of Caerbannog
https://en.wikipedia.org/wiki/Rabbit_of_Caerbannog
- Thu Jan 09, 2020 2:33 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Perihelion to Aphelion (2020 Jan 09)
- Replies: 30
- Views: 9701
Re: APOD: Perihelion to Aphelion (2020 Jan 09)
This has me wondering, although not really on topic with today's APOD. I don't really understand how the latest sunrise, and earliest sunset are not on the day of the Winter Solstice (or so I've heard), and conversely; the latest sunset, earliest sunrise and the Summer Solstice. (local time, Norther...
- Mon Jan 06, 2020 4:04 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Tumultuous Clouds of Jupiter (2020 Jan 06)
- Replies: 28
- Views: 7619
Re: APOD: Tumultuous Clouds of Jupiter (2020 Jan 06)
I'm more interested in the white clouds at about 4 o'clock, halfway in from the visible horizon. It looks like a splash in a liquid surface, with droplets thrown upwards, but a gas surface doesn't behave like that. What might be causing that? Better to think in terms of "fluid" than "...
- Sun Jan 05, 2020 3:41 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Fainting of Betelgeuse (2020 Jan 02)
- Replies: 27
- Views: 14247
Re: APOD: The Fainting of Betelgeuse (2020 Jan 02)
After rethinking... The Cygnus Loop is ~130 ly in diameter at an age of around 21,000 years. Simeis 147 is ~160 ly in diameter at an age of around 40,000 years. Once SNRs are this large they have already swept up at least a thousand solar masses of interstellar medium. Every time they double their ...
- Fri Jan 03, 2020 10:39 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Fainting of Betelgeuse (2020 Jan 02)
- Replies: 27
- Views: 14247
Re: APOD: The Fainting of Betelgeuse (2020 Jan 02)
The resident "know it all" in my workplace has said that when Betelgeuse explodes, its cloud will eventually engulf our solar system reducing visible stars to about one third.
Has anyone else heard/read of that?
Has anyone else heard/read of that?
- Fri Dec 20, 2019 3:11 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Hotspot Map of Neutron Star... (2019 Dec 18)
- Replies: 41
- Views: 8148
- Fri Dec 20, 2019 3:05 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Late Afternoon on Mars (2019 Dec 20)
- Replies: 6
- Views: 2791
Re: APOD: Late Afternoon on Mars (2019 Dec 20)
https://www.planetary.org/explore/space ... endar.htmlorin stepanek wrote: ↑Fri Dec 20, 2019 1:15 pm I take it that the Mars calendar has 26 months? Just going by the 2616 Date!![]()
https://en.wikipedia.org/wiki/Darian_calendar
![Confused :?](./images/smilies/icon_confused.gif)
- Thu Dec 19, 2019 5:33 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Apollo 17's Moonship (2019 Dec 19)
- Replies: 15
- Views: 4953
Re: O Kapton! My Kapton!
Here is a link about a tragedy when Kapton failed.
(this is in no way to be considered a criticism of Neufer's post)
https://hackaday.com/2018/04/04/kapton- ... c-history/
- Wed Dec 18, 2019 2:47 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Horsehead Nebula (2019 Dec 17)
- Replies: 14
- Views: 4302
Re: APOD: The Horsehead Nebula (2019 Dec 17)
Actually, I think that is a better way of looking at it.
- Mon Dec 16, 2019 2:43 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Magnetic Fields of Spiral Galaxy M77 (2019 Dec 16)
- Replies: 14
- Views: 3490
Re: APOD: The Magnetic Fields of Spiral Galaxy M77 (2019 Dec 16)
It appears that the X-rays show M77 infested with intestinal parasites.
"Paging Dr. McCoy! Paging Dr. McCoy!"
"Paging Dr. McCoy! Paging Dr. McCoy!"
- Tue Dec 10, 2019 2:44 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Starlink Satellite Trails over Brazil (2019 Dec 10)
- Replies: 16
- Views: 5039
Re: APOD: Starlink Satellite Trails over Brazil (2019 Dec 10)
The astronomical issue can be partly mitigated by changing the shape of surfaces on the satellites and by using materials and coatings that have low reflectivity. Or by the billionaire financier sending his security team (AKA: Bruno, Knuckles, and Tiny) to any complaining astronomers to "silen...
- Tue Dec 10, 2019 2:41 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Starlink Satellite Trails over Brazil (2019 Dec 10)
- Replies: 16
- Views: 5039
Re: APOD: Starlink Satellite Trails over Brazil (2019 Dec 10)
"Before the breathing air is gone,orin stepanek wrote: ↑Tue Dec 10, 2019 1:54 pm Well; I can still see the Orion: Luna; the Pleiades; Mars; & Venus!Oh; and the dippers!
before the Sun, is just a bright star in the nighttime."
![Sad :(](./images/smilies/icon_sad.gif)
https://www.youtube.com/watch?v=s3gGn6t8Bog
- Wed Dec 04, 2019 2:35 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Electric Night (2019 Dec 04)
- Replies: 17
- Views: 4441
Re: APOD: Electric Night (2019 Dec 04)
Ann,
People who live in glass houses,
should also shower in the basement!
B^)
People who live in glass houses,
should also shower in the basement!
B^)
- Tue Nov 26, 2019 2:56 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Venus and Jupiter on the Horizon (2019 Nov 26)
- Replies: 6
- Views: 2317
Re: APOD: Venus and Jupiter on the Horizon (2019 Nov 26)
As I was looking at the description, I wondered "Okay, so what is the 3rd bright object in the picture?" So, as I scrolled down to click the "Discuss" button, it became quite obvious. It was a light colored speck on my monitor! B^) Happy Thanksgiving to APODders in the USA! (and ...
- Wed Nov 20, 2019 9:42 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Arp 273: Battling Galaxies from Hubble (2019 Nov 20)
- Replies: 41
- Views: 9579
Re: APOD: Arp 273: Battling Galaxies from Hubble (2019 Nov 20)
Note the rather ugly photographic defect near a bright blue-white foreground star seen very close to the center of UGC 1810. Those two orange "rings" to the upper right of that star mar the image, in my opinion. If you don't look too closely at that feature, it looks more like a boxing gl...
- Fri Nov 08, 2019 9:06 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Messier 45: The Daughters of Atlas... (2019 Nov 07)
- Replies: 16
- Views: 3862
Re: APOD: Messier 45: The Daughters of Atlas... (2019 Nov 07)
You just need to know where to look for it.
It is tougher to see when it is turned off.
![Smile :)](./images/smilies/icon_smile.gif)
- Fri Nov 08, 2019 9:03 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Messier 45: The Daughters of Atlas... (2019 Nov 07)
- Replies: 16
- Views: 3862
Re: APOD: Messier 45: The Daughters of Atlas... (2019 Nov 07)
Thanks Neufer,
I can always count on you
to shoot me out of the saddle!
B^)
I can always count on you
to shoot me out of the saddle!
B^)