Questions tagged [naked-eye]
Questions about observations performed without the aid of any optical instrument.
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How easy would be to see the Moon from Mars?
This question arises from "What planet is better than earth to infer solar system configuration?", where one of the answers pointed that it's easier to discover the Moon from Mars than discovering the ...
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Is the Sun visible from Proxima Centauri to human eyes?
I know that the light coming from Proxima Centauri is not bright enough to make it naked-eye visible from the Earth. Is the Sun naked-eye visible from Proxima Centauri?
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Have there been successful attempts at spotting Neptune with the naked eye?
As pointed out here, the limit of naked eye visibility for people with extremely good night vision is about magnitude 8.5. Neptune at opposition is much brighter at magnitude 7.7, so it should be ...
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Tunnel vision while viewing through a reflector
I have a Celestron astromaster130 eq. While viewing through its eyepiece, or using a smartphone camera for photography purpose there is always a definitive no light region( it is circular in curvature)...
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Good textbooks for a descriptive astronomy course
Brief tale of woe
My department at a small public university in the US has decided to begin offering a descriptive astronomy general education course for the first time in a couple of decades and we ...
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Seconds of Arc and the Unaided Eye
I've been presented with this problem:
Say that Jupiter, with its diameter of 142,000 km, was located where Mars now orbits. What would be the angular size of (the newly-relocated) Jupiter ...
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The colour of saturn as it appears to the naked eye
I have started to watch the skies in order to learn stars, constellations planets etc. The few references I checked state that Saturn presents itself to the naked eye as a pale yellow tiny little ball,...
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Stars in the sky
Are the stars we can see with the naked eye in the night sky only from our Milky Way galaxy or can we see stars from Andromeda? I am aware we can see other celestial objects like nebulas and the ...
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How strong does a light source on the Moon have to be to be visible from Earth? [duplicate]
Flashes from some meteoroid impacts on the Moon can be seen with the naked eye. How much light must a future lunar base emit in order to be visible as a dot in the lunar night (like the flag of ...
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How much of the Milky Way is visible to the naked eye from earth?
When we see the Milky Way on a dark night are we seeing the bulk of the galaxy, or just our local arm? How much of the milky way is visible to the naked eye on a dark night?
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How many stars would be visible in the Martian night sky?
How would the night sky look from the Martian surface?
Would there be more stars visible or fewer, compared with Earth?
Would they appear brighter, dimmer or the same?
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Sky view from Stellarium software vs. Sky view with naked eye
I'm slowly starting to interest in astronomy. Currently I'm enjoying in stargazing but unfortunately place where I live is very light polluted.
I'm planing my vacation in a couple of months and one of ...
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How many stars can be seen naked eye from outside the atmosphere? How dense is the "sky" from there?
When I was 20, I went to Naxos (Greece) with friends. I was driving my car during the night on the mount Zeus (1003 meters - 3,291 ft) listening Pink Floyd.
Up there we stopped the car to take a walk,...
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How bright are the outer planets, when at close range?
Seven probes have passed by or orbited outer planets. I wonder how their photos differ from the naked eye view one would have if one were actually there.
Saturn is 10 AU from the Sun, which means ...
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Does naked eye miss a lot between local stars and distant milkiness?
When I look at the night sky I seem to resolve points which are local stars and milkiness at further regions of the galaxy. But what is between? I think there must be a lot of stars which are too ...
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Why does the Moon sometimes look Yellow?
My friend and I both noticed that the Moon looked yellow Yesterday, but it wasn't like that the same time the day before, as far as I remember.
Does the Moon sometimes look Yellow? If it does, why ...
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Aren't there more naked-eye-visible stars in the Milky Way plane?
Most stars which are visible to the naked eye are within 1,000 light years. The Sun is inside the Orion arm which has a diameter of about 3,500 light years. Thus, all stars (with very few exceptions) ...
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What is the apparent magnitude limit for the naked eye?
If you only read the question, you will answer: ''That depends on the light pollution''. Yes, it does, but if you are in the darkest night sky (Bortle class 1), what magnitude would have the faintest ...
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Is the Moon only 60x60 pixels?
In doing research on vision, I have learned that "20/20" vision corresponds to a visual acuity of being able to resolve details 1 arcminute in size, that most people have around 20/15 vision,...
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How many stars and galaxies can be seen by the naked eye?
How many of the luminous dots that we see naked are galaxies and not stars from our galaxy?
I imagine that the majority of the luminous points that we see naked eye during the night, are actually ...
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