Questions tagged [telescope]
Questions related to the physical instruments for astronomical observations.
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How to find the minimum range at which some imaging payload/instrument can produce a clear image?
JWST's NIRCam can image deep sky objects so clearly. However if we notice the images of planets like Mars, Saturn or Saturn's's Moon-Titan, they don't appear to be much clear. Hence considering the ...
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Which galaxy has the best view of Earth using telescopes like the ones we have?
By best view I mean most detailed view of Earth but I suppose you could also include the general surroundings such as the solar system.Perhaps this question also asks from where would aliens most ...
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Celestron X-Cel Barlow 2x magnification or Celestron X-Cel LX eyepiece 5 mm for 250P Dobsonian Sky-Watcher Telescope
I have recently gotten a Dobsonian 250P Sky Watcher Telescope and just wanted to ask whether it would be better to get a Celestron X-Cel Barlow 2x magnification or Celestron X-Cel LX eyepiece 5 mm, ...
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Difference in field of view between JWST and Euclid
I was watching this video about the Euclid telescope. At the 8 minute mark he compares the field of vide of Euclid with that of the JWST, showing that the Euclid field of view is much larger.
While I ...
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Vera C. Rubin's LSST's ginormous camera's shutter; why does it open/close 1000 times a night & is this typical for large-format survey telescopes?
CNET's April 23, 2024 World's Largest Camera, the 3.2-Gigapixel LSST, Is Complete says after about 02:19
That shutter is actually so big it had to be broken down into two pieces just to fit inside ...
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Given our current level of a technology, how far could we send a signal that we could detect?
I'm interested in both what we can do with things we've already built as well as things we could build (including with serious, but not insane amounts of funding).
This would be a deliberate signal ...
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What was the first nebulae of the first class?
On Wikipedia, it describes the Tarantula nebula as
the second of the "Nebulae of the First Class",
Wikipedia says that a Nebulae of the First Class is a Nebula with no other stars visible ...
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C8 Finder Rotates Freely
I have a Celestron C8 circa 1985 that I haven't used in about 20 years. The diagonal on the finder freely rotates. There is virtually no friction, so it won't stay where I want it. I don't see any ...
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Largest Optical Telescope NOT at Higher Elevation
It's trivial to find the list of largest optical telescopes by aperture size. What I'm interested in is the largest optical telescope in the world, regardless of ownership or origin (amateur or ...
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Published magnitude limits of surveys
I'm working with several astronomical catagloues (mostly SDSS, GALEX and WISE), and I'm trying to find information on their magnitude limits (i.e. the highest magnitude objects they can detect). They ...
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Why do we call radio images "maps"? Is it because it is not optical, so therefore not an "image", strictly speaking?
Or is it just historical convention? I know that within research circles, it is common to also use the term "radio image". I am mainly wondering whether the term originally comes from ...
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Do solar eclipse paper glasses need to list both the ISO and CE stamp to be compliant or is the ISO sufficient?
I purchased them at the checkout at Walmart. They are Manufactured by American Paper Optics, LLC. Visionscientific.com ISO 12312-2.
However I don't see the CE on the glasses. Are they still OK? The ...
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Will there be a difference in what can be seen with a 50mm telescope and a 70 or even 80 mm one?
tl;dr Is there a celestial object which has details that can be seen clearly by a 70mm telescope, but no details at all seen by a 50mm telescope of the same make. E.g. "Jupiter has details that ...
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About telescope load
I am using planewave CDK24 Telescope. The focuser I am using is IRF90 which has maximum load capacity of 18 kg. The load that I am going to attach is 14 kg. Is this alright to attach this weight?
Is ...
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First photographic image taken with telescopes to produce astronomically useful results? What telescope was used?
comments on the question and answer(s) to What are the technological advancements that made it possible for modern large telescopes to work with alt-az mounts instead of equatorial mounts? have made ...
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