Questions tagged [deep-sky-observing]
Questions about stellar objects which are too faint to observe with faint naked eye or even too far away for Earth-bound telescopes.
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How exactly will Trailblazer (the precursor to SatHub) help Astronomers plan their optical observations? Will it be open to the public?
Space News' Astronomers back technical efforts to reduce impacts of satellite megaconstellations while seeking regulatory solutions
says:
At the conclusion of the weeklong SATCON2 workshop July 16, ...
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3answers
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If a black hole was headed for our solar system and would arrive within a year, would we necessarily know of it?
Basically, is our observational technology and coverage sufficient enough to pretty much always spot incoming objects like a black hole when they're a year from arriving? If so, within what time frame ...
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Is it likely there are more rogue planets than brown dwarfs, and that we just can't see them because they're too dim?
Among celestial bodies revolving around the galactic center directly, it seems the bodies of lowest mass (brown and red dwarfs) are the most abundant. However, when it comes to even less massive Y-...
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1answer
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From Proxima b, could any planets around Sol be imaged directly by a strong telescope? If so, which ones would be easiest to spot?
How strong would a telescope (and what kind of telescope) on Proxima Centauri b have to magnify to discern any planets around Sol, and which planets would be easiest to spot? One might think the ...
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2answers
721 views
What can I see with different apertures?
I'm looking to buy a telescope, and every mainstream website says that aperture is the most important factor, and buy the largest telescope your budget can afford. However, a website I found offering ...
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Why aren't there any images of Sun-orbiting bodies by Spitzer?
Why didn't the Spitzer space telescope shoot images of (dwarf) planets around the Sun, or did it? Even though its primary goal was to detect (the characteristics of) exoplanets, it could have revealed ...
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2answers
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Will we ever be able to see the surface of exoplanets directly?
When exoplanets are depicted, artist's impressions are used. The presence of exoplanets is observed by a dip in the emitted power of a star when a planet moves between us and the star (a kind of star ...
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2answers
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How do you determine whether a certain object can be detected by an observatory based on coordinates?
If I am given the latitude and longitude of an observatory or observation point, how can I determine whether a given object, based on its equatorial coordinates, is observable from that observatory?
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How do I design a good telescope to observe nebulae and other deep sky objects [closed]
How can I make a good telescope that is powerful enough show nebulae and other deep sky objects ? (consider low budget build)
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How to use DeepSkyStacker to increase detail, reduces noise, and not lose colour?
I had my first attempt at shooting the Orion Nebula and am pleased that I saw it for the first time. Very exciting. I shot 10 frames and then stacked them using DeepSkyStacker which brought out all ...
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Why can't ESA/NASA build a handful of Gaia telescopes and launch them into different positions in space for better accuracy?
I've noticed that many stars in GAIA DR2 have highly uncertain distances. Why can't a space agency send multiple Gaia spacecraft into orbit around different places (One in L2 Earth, one in ...
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Why was StDr56 discovered only now?
StDr56 is a newly discovered planetary nebula (maybe). link1 link2
It was found by amateur astronomers Marcel Drechsler and Xavier Strottner.
According to the above articles, it's pretty big:
With an ...
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1answer
66 views
How big would the supernova when a neutron star collides with another neutron star? [closed]
If two neutrons stars that are orbiting were to collide, how big would the supernova explosion be?
Would a new black hole or a new supernova remnant be formed?
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1answer
197 views
Eyepieces and accessories recommendations for a Starblast 4.5-inch scope in a city as well as darker suburbs, and kid friendly?
For the Starblast 4.5 Telescope I currently have an Orion 7-21mm Zoom eyepiece attached on top of a 2x Barlow lens. I like them because of the magnification they give stacked together and the zoom ...
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3answers
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What is a good focal length for DSO
I found two telescopes that i'd like to buy, but one has 900mm focal length ((Skywatcher Newton 114/900 EQ1)) and the other has 500mm focal length ((National Geographic Dobson N 114/500)).
My ...
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1answer
99 views
How is the distance of a star from Earth calculated in the HYG star database
The HYG star database can be found here
From the hygdata_v3.csv file, how are the cartesian (x,y,z) coordinates calculated? (Is there a mathematical formula for this?)
And in the dso.csv file, there ...
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Detect sources near image edge with python photutils
As my question suggests, I 'm trying to use a python library photutils in order to detect sources from MUSE cube. MUSE (Multi Unit Spectroscopic Explorer) is an ...
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Approximately how many light years across (arclength) was the furthest reaches of the Hubble Ultra Deep Field?
I can find the area($11^2$ arcminutes) and lengths ($200$ arcseconds per side) but if I were to consider just the furthest region (arclength) of the survey, about how many light years across would ...
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1answer
424 views
DSO in a 60mm telescope
I am thinking about buying a telescope, but here in Brazil they are very expensive and hard to find where to buy. So, the better telescope I can pay for is a Celestron Powerseeker 60AZ. My main ...
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1answer
80 views
How can I use my current camera whose zoom lens can't be removed behind an f/6 refractor for as an astrophotography?
I am looking at an Astrotech AT60ED (60 mm f/6 with a field flattener) and a Digi-Kit telescope adapter to do astrophotography, mainly deep-sky and I'm wondering if I can use my current Panasonic DMC-...
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1answer
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Astronomical animations of deep space objects
Is there any real animations from NASA or others (not simulation or Artist's impression) like this
https://svs.gsfc.nasa.gov/vis/a000000/a004400/a004442/frames/730x730_1x1_30p/
or this
https://...
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1answer
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Do large telescopes, especially plans for the LSST, avoid saturation artifacts from the brightest stars and planets? If so, how?
This interesting answer to What is the LSST's plan to address frequent satellite trails in data? quotes:
From the LSST webpage:
The first group of Starlink satellites are sufficiently bright during ...
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1answer
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Will LSST make a significant increase in the rate of astronomical event alerts?
The NPR news article and podcast New Telescope Promises To Revolutionize Astronomy updates the status of the "Large Synoptic Survey Telescope under construction on Cerro Pachón in Chile".
NPR's Joe ...
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What causes these asteroid trails to be so strangely shaped and repeated?
The Phys.org news item Hubble is the ultimate multitasker: Discovering asteroids while it's doing other observations includes the image below.
What causes these asteroid trails to be so strangely ...
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2answers
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How to locate nebulas visible through AstroMaster 114 telescope without device assistance?
I will be going to the desert this month and it's my understanding that the night sky will be very dark there. I've got some practice locating the planets but I'd really like to get a look at a nebula ...
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1answer
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When a rogue brown dwarf star hits a white dwarf star, will the collision at most cause a nova? [closed]
When a rogue brown dwarf star hits a white dwarf star, will the collision at most cause a nova?
Or can the explosion be heavier?
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3answers
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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 ...
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1answer
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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 ...
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2answers
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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 ...
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2answers
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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 ...
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1answer
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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?
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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 ...
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4answers
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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 ...
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1answer
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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 ...
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1answer
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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 ...
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1answer
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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 ...
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1answer
258 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 ...
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2answers
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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 ...
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4answers
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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 ...
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1answer
496 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 ...
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1answer
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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 ...
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1answer
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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 (...
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0answers
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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 ...
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1answer
518 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 ...
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2answers
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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?
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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 ...
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1answer
461 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:
...
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1answer
122 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 ...
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4answers
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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.
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1answer
145 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 ...
