Questions tagged [deep-sky-observing]
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14
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3answers
1k views
What is the “lost light” in this unusual Hubble Deep Sky image?
The Daily Galaxy article “The Lost Hubble” –New! Deepest Image of the Universe Ever Taken says:
To produce the image a group of researchers from the Instituto de Astrofísica de Canarias (IAC) led ...
2
votes
1answer
35 views
Cases of gravitational lensing resulting in a recognizable image of an extended object?
There are several different classifications of gravitational lensing phenomenon.
Here I am asking for any examples of strong lensing where the lensed image of an extended object is magnified and ...
3
votes
2answers
100 views
I've seen some stars tonight. What could I possibly have been looking at with these pictures?
The weather tonight here is great and I decided to shoot some hand-held (too bad I don't have any tripod) night mode pictures shot with P10. I have no experience in stars observation therefore I can't ...
1
vote
2answers
41 views
How to find a deep sky object 1° NE from a given star
I am an amateur so sorry for any misunderstanding.
I am trying to find a deep-sky object located 1° north east from the δ Cas star. I am using the Stellarium ...
3
votes
1answer
66 views
Studies of isotropy from different ends of the visible universe?
Have there been studies to compare structures that are 26 billion light years distant (i.e. from one side of the observable universe to the other) to search for faint differences?
18
votes
2answers
4k views
What did I photograph?
Last night I was experimenting with my mobile phone shooting the night sky adjusting some settings like shutter time and ISO. One of the first pictures I thought was a complete failure, I only ...
2
votes
4answers
330 views
Is it practical to build a giant telescope in Moon? (Considering the fact that the atmosphere of moon is very rare)
China's FAST (Five-hundred-meter Aperture Spherical radio Telescope) is the largest radio telescope in the world.(This is huge!!!)
As we all know Space Telescopes are better than Earth-Based ...
5
votes
1answer
90 views
Surface brightness of deep-sky objects and telescope specs
I'm new to amateur astronomy, and I recently acquired my first small telescope. I've just learned a bit about surface brightness after an unsuccessful night of trying to locate a few nebulae that were ...
3
votes
1answer
152 views
Might the SpaceX Roadster intercept any ongoing surveys?
There are star survey telescopes in space, and on Earth. I don't really know how to begin to know where they will all be looking for the next few months. On the off-chance that someone does, or can ...
4
votes
1answer
115 views
What have we learned from the observation of most distant galaxies [closed]
We have seen galaxies around 13 billion years old. Since these galaxies formed so early in the history of the known universe, are there observables about these galaxies that are apparently different ...
0
votes
1answer
167 views
Buying a telescope for the first time. How important is the focal ratio and is a computerised telescope worth it?
I'm wanting to purchase a telescope for the first time. I've narrowed it down to 2 options based on what I've discovered from researching and my price range. I mainly want do planetary observations ...
4
votes
2answers
128 views
What is the largest (angular) dark area in the sky?
Question
Within our current knowledge, what is the largest (circular, say) area in the sky which is empty/dark? I'm thinking in terms of angular size.
Motivation
I was wondering what was the ...
13
votes
4answers
1k views
Why are there so many seemingly blue-shifted galaxies in deep space
NASA released this image of deep space. The way light shifting vis-a-vis universe expansion is supposed to work is by making the furthest galaxies appear mostly red-shifted. But NASA's image shows ...
2
votes
1answer
296 views
Power of the James Webb Space Telescope [duplicate]
I have heard that the JWST will be capable of looking at the early stages of the universe. However I have also heard that it won't be capable of detecting the Oort Cloud that supposedly provides ...
0
votes
1answer
92 views
SDSS. Google Sky and DeCaLs
(1) Please go through following image
Possible Super Red Giant?
However sdss shows it as galaxy! Am I missing something.
(2) Google Sky shows object in latitude and logitude format like this.
Is ...
2
votes
1answer
216 views
Has the most luminous object in the universe been found?
It's hard to search through the entire (observable) universe, but the most luminous thing there is must on the other hand be easy to find. Can we now say that the most luminous quasar we know, is the (...
3
votes
0answers
60 views
How does one find the extinction coefficient of a particular galaxy? [closed]
I am doing photometry on a number of objects in a number of different galaxies. I need the extinction coefficients for these galaxies for various filters passes. Is there some database that displays ...
4
votes
1answer
434 views
Why are Hubble images “Cut”
Whenever you take a look at a photo that is taken by hubble,
Lets say M87 or Eagle Nebula or maybe Ultra Deep space field,
The Image is always "Cut"
Like this :
or this
I want to know reason ...
2
votes
2answers
636 views
Calculating area of visible sky
Can we calculate the area of sky visible to us from the point we are standing?I mean is there any idea or experiment to calculate it?
1
vote
1answer
112 views
What is the line of light in galaxy cluster MACS J1206?
I noticed this in a thread from world building, what is the continuous line of light in MACS J1206 slightly right of center in this picture? The only thing I could think of would be the side view of a ...
7
votes
1answer
356 views
Have we detected galaxies which have red-shifted beyond the visible light range?
According to this answer it is possible for galaxies' light to move beyond the visible frequencies due to redshift:
...
4
votes
1answer
104 views
Red shifting galaxies
I am an amateur astronomer please correct if any of my understandings are wrong. We all know that from the Hubble's ultra deep field image the most distant galaxies which were created shortly after ...
2
votes
2answers
877 views
Is it difficult to see DSO in your eyepiece?
I want to know if bringing the image of a DSO in eyepiece generally represents a problem for beginners in astronomy.
3
votes
1answer
134 views
Sloan digital sky survey galaxies
I am trying to get some data from the Sloan digital sky survey (SDSS). This task turned out to be challenging for me as someone with only little knowledge about astronomy and maybe someone here can ...
5
votes
1answer
149 views
Space objects visible from earth
I recently saw the International Space Station without a telescope. Are there any other man-made space objects that can be seen using bare eyes?
10
votes
2answers
4k views
Are Barlow Lenses Good For Deep Sky Observing?
I'm using a 750mm (focal length) by 150mm (aperture) newtonian reflector and I've been curious about using Barlow lenses on deep sky objects.
Some of the astronomers at my local observatory say that ...
