Questions tagged [naked-eye]
Questions about observations performed without the aid of any optical instrument.
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Low Latitude Aurora
It's been in the news recently that the aurora was visible in Europe at much lower latitudes than usual, ie, not just in Scandinavia but as far south as the Adriatic. Sadly, I didn't find out about it ...
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Ancient adjudication of the new moon from witness testimony
The ancient method of certifying the new moon in the Land of Israel in ancient times is described in Mishnah Rosh Hashanah 2:6. Witnesses would come to Jerusalem and testify before the Sanhedrin that ...
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Are there naked eye binary stars with periods less than 100,000 years?
An optical double is two stars which appear very close together because they chance to be lined up as seen from Earth but are actually tens, hundreds or thousands of light years apart in space.
A real ...
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How close can Venus be to the sun in the sky and still be visible to the naked eye?
Assuming no artificial light, what is the minimum number of degrees apart would the sun and Venus have to be during the beginning of civilian twilight for the planet to be visible to the naked eye to ...
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What does it look like to view an annular solar eclipse with the naked eye?
How does the experience of an annular solar eclipse compare to a total solar eclipse? In particular, what does it look like to take a glimpse of an annular solar eclipse with the naked eye? How dark ...
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A what distance could we see the Sun?
How far away can we see the Sun with the naked eye?
How far with an amateur telescope? And with the James Webb telescope?
In my own calculations the Sun would appear magnitude 6 at 56 ly, magnitude 8 (...
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Is Uranus the farthest object in Solar System that you can see with naked eyes?
The following text is from this article:
The fact is, even at its brightest, Uranus is still quite faint. It’s barely perceptible as a dim speck of light to the unaided eye, even under dark skies. At ...
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How many planets can be seen by the naked eye? [closed]
I can see Venus and Mars, what about the others?
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What objects in the night sky have the narrowest range of visible light
What objects visible to the naked eye at night have the narrowest spectrum of visible light reaching the earth. Put another way, Which objects are most visible as a specific color or colors rather ...
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How do stellar magnitude and integrated magnitudes compare, perceptually?
(P.S. this is naked eyed)
Magnitudes are easily defined for point-like objects i.e. stars. However, for extended objects, the "magnitudes" quoted are actually integrated magnitudes.
For ...
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Angular resolution of naked eye at night; type of vision used
It appears that most sources quote the angular resolution of the eye as 1', regardless of day and night.
For instance,
Naked eye
Seconds of Arc and the Unaided Eye
However, the following websites give ...
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If you could get up close to them, what nebulae would be the most visually impressive to your naked eye?
Pop cult sci-fi movies like to show nebulae as they appear in photographs, but to a live, real-time viewer: these dazzling, snazzy and amazing backdrops to spaceship flying in front of them in real-...
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What would be the highest possible naked-eye apparent magnitude?
What would be the highest possible magnitude $m$ of some star that could be viewed with a naked-eye? I am acquainted with this question, but mine is about the ideal conditions.
In order to achieve ...
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Back when the CMB was predominantly in the visible spectrum, would it have been visible to the naked eye?
The CMB is a near-perfect black-body spectrum, and assuming this has been true since the de-coupling, we should have been able to see the glow. In fact, at a certain point, it should have been almost ...
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Can Jupiter's rings be seen with the naked eye by an astronaut nearby? How difficult would it be?
Maybe a basic question, apologies.
I understand that there would be different answers depending on how far is "nearby", depending on how inclined our orbit is, and what is our alignment with ...
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