Astronomy pictures thread
- Thread starter EricTheCat
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Thanks! Yes here's the annotated version. Love the faint fuzzies. I'm hoping for a chance to go for Markarian's chain next.
Hurts my head! We are living on a tiny speck of dust.
Like a Chinese space cowboy...
If every galaxy has just one planet with what we consider life then the possibilities are mind boggling.
An unfathomable enigma.
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CAPTION: Wolf-Rayet stars are known to be efficient dust producers, and the Mid-Infrared Instrument on NASA’s James Webb Space Telescope shows this to great effect. Cooler cosmic dust glows at the longer mid-infrared wavelengths, displaying the structure of WR 124’s nebula. (Credits: NASA, ESA, CSA, STScI, Webb ERO Production Team.)
The view from the end of my driveway last night.
Dang, you pretty far up north
Finally getting to the pics from my other camera (t4i) that was rolling on aurora while my main camera (t8i) was imaging galaxies before I pulled that camera to assist with the aurora.
Thousand+ aurora frames to go through, videos, and making time-lapses as well. Lots of data to keep me busy.
Thousand+ aurora frames to go through, videos, and making time-lapses as well. Lots of data to keep me busy.
Markarian's Chain of galaxies (M84, M86, M87, NGC4438, NGC4435, NGC4461, NGC4473, NGC4477 and many others) from last night
Date: 3/26/2023
Camera: Canon Rebel T8i
Telescope: 92mm f/5.5 triplet (Astrotech AT92) with focal reducer
Exposure: 83x240sec (5hr 32min total) at ISO 400
Annotated image (this one without the PGC catalog which made the image a bit too busy):
Date: 3/26/2023
Camera: Canon Rebel T8i
Telescope: 92mm f/5.5 triplet (Astrotech AT92) with focal reducer
Exposure: 83x240sec (5hr 32min total) at ISO 400
Annotated image (this one without the PGC catalog which made the image a bit too busy):
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Nice pic. I looked it up and saw that it is around 50 million light years away.
Do you have any idea as to the the distance is between those Galaxies? Like M84 & M86. Any idea how close they are to each other?
My best guess is about 1 arcminute. Probably not the answer you're looking for though.
Based on 50 million light years away, according to this angular size calculator https://www.1728.org/angsize.htm.My best guess is about 1 arcminute. Probably not the answer you're looking for though.
About 14544 light years away from each other.
You would be correct in that assessment. LolMy best guess is about 1 arcminute. Probably not the answer you're looking for though.
That's the kind of answer I was looking for.
The reason I asked is because when looking at your pic, I wondered that if there was someone there looking back our way, would they see our Milky Way and Andromeda as close to each other as we see them.
....but apparently our Milky Way and Andromeda would appear to be much further apart than that.
How well would we be able to see Andromeda if it were only 14544 light years away from us? Seems like it would be very prominent in the sky.
Using same calculator and a few calculations, very roughly Andromeda galaxy would take up about 41 degrees of our sky at 14544 light years.
One way to visualize, if you assume M84 and M86 are roughly the same distance from us, imagine what angle from one of them you would have to make to span the diameter of one of the galaxies with the vertex on the other galaxy. That angle would be roughly the same angle as the angular diameter of the galaxy as seen in their sky.
These are fun things to think about. Thanks for the questions.
No, thank you!
For both the excellent pics, as well as the knowledge of our Universe that you share with us.
....and I think I speak for everyone here when saying that.
Same goes to you too, @foolsgold . The pics and knowledge you share with us is top notch too. Both of you and your work, is much appreciated.
Both of you, please keep it up!
ISS solar transit this morning (one year to the day before the total solar eclipse of 2024!).
Animated GIF
Telescope: 110mm f/7 ED refractor (Orion) with mylar white light solar filter
Camera: Canon Rebel T8i
Exposure: 1/2000 sec at ISO 200
Video mode: 1920x1080 59.94 FPS
Pass details:
Saturday 2023-04-08, 11:45:21.04
ISS angular size: 49.96″
Az.: 145.8°; Alt.: 48.3°
Transit duration: 0.70 s
Angular separation: 0.63′
Animated GIF
Telescope: 110mm f/7 ED refractor (Orion) with mylar white light solar filter
Camera: Canon Rebel T8i
Exposure: 1/2000 sec at ISO 200
Video mode: 1920x1080 59.94 FPS
Pass details:
Saturday 2023-04-08, 11:45:21.04
ISS angular size: 49.96″
Az.: 145.8°; Alt.: 48.3°
Transit duration: 0.70 s
Angular separation: 0.63′
That's amazing. I recognized that galaxy as that really small weird looking one I see off to the side any time I image m101 with my little rigs.
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Yes that's the one. I took this over the course of two nights with Johnson-Cousins R-V-B filters when the skies were good. I am just finishing up a 6 week course on CCD Photometry given by the AAVSO. And a scientific camera arrived today that will be used to take images for IOTA - https://occultations.org/
That's awesome. Doing some real science!
Wait, you had 2 CLEAR NIGHTS!?? I thought this was 2023.
Aurora last night. Luckily the sky cleared for a little while. It was a pretty good show.
Camera: Canon Rebel T8i (modified)
Lens: 15mm f/2.8 sigma
Exposure: 6sec at ISO 1600 and f/2.8
Camera: Canon Rebel T8i (modified)
Lens: 15mm f/2.8 sigma
Exposure: 6sec at ISO 1600 and f/2.8
- Messages
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- Reaction score
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- Points
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Eric how naked eye visible were the Aurora? I never see them where I live.
They were very noticeable. Not quite as bright as the previous display a month ago. The display a month ago I could see them through my kitchen window with my sunglasses on. My skies are close to bortle 5-6 (estimated). I have a very clear view to the North but quite light polluted.
- Messages
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What is your Latitude? Mine is 41 degrees.
44 degrees.
A couple things I look for when looking for aurora. When it is not obvious I look for vertical features facing North. When they aren't bright enough I don't see color but noticing vertical features helps distinguish aurora from clouds.
Last night it was pretty obvious. Bright green color and a lot of motion including flashing and curtains appearing and disappearing very quickly.
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Has to be a male nebula.... no female would put up with all that dust....
A few more pics from the night before last. I think the white balance is a little more accurate on these ones.
Aurora time-lapse 4/23/2023
I heard that they were visible in central PA recently, and that is 41.3 degrees North. Pretty close to your 41.
So there may be hope for you yet.
I'll try to find the vid I saw that mentioned it.
If there's a good reason to miss them that's probably it. I am at my telescope image capture desk right now. I didn't realize it was going to be a good clear night until about the time I was getting dinner ready.
