Stars in the night sky twinkle, but planets do not.
Why?
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This statement feels incorrect to me. The light from planets will get scattered through the pockets of varying temperature and dust in earths atmosphere, same as any star would. This effect is more pronounced the closer to the horizon the object is from our point of view due to having to pass through more of earths atmosphere to reach your eye.
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Yes the statement is only usually true. I have seen small planets twinkle near the horizon.
Stars are fireballs;Planets reflect light,eh?
The question is not accurate. It should state "planets of the Solar System".
Shimmering effects such as heat haze and mirages are clearly visible over far shorter distances, for example above hot roads, in deserts, or behind jet engines. The fact that light from a star has come further does not make it more prone to refraction or other optical effects. Assuming it is true that distant stars appear to shimmer more than planets (I’ll be checking on the next clear night) it is presumably a function of the angular diameter — the light reaching your eye follows a very narrow path. Although planets appear as similar pinpricks of light they have a greater angular diameter so light reaches your eye from a number of slightly different directions making the image less prone to distortion.
The shimmering effect doesn't happen in vacuum, it needs light to pass through a gas that is hot enough, to move around to reflect light and photons.
A planet reflects much less light than its star emits, so I assume that the light that reaches us from far away planets might not be visible on naked eye while stars around the same distance could be visible. Thus when the only close star isn't in our sky (night time) we can say that everything we see twinkling is a star and more solid light points are planets, however if our eyes were sensible enough to see the light reflected from far away planets the image of those planets would be twinkling as well.
Please correct me if I'm wrong but associating this phenomena with the type of the celestial body isn't a misleading generalization while it has only to do with the tiny amount of light that is reaching us due to the source distance?
Also I believe that the path distortion happens not only in the atmosphere but while travelling through space as well, like when it travels between regions with different dark matter densities.
I'm not criticizing the question itself, it's clear enough what is being asked, I'm more curious about if what I stated above is correct as I'm just a layman in astronomy so I would like to add this as a comment and see if there's any misconceptions on my part but only "Add your own solution" is available.
They Reflects light so reflection do not Twinkle like moon ! they do not have their own source of light !
You are right, this phenomenon only depends on the angular size of the object that we see on Earth, and not whether it is a star or a planet. In our observations, the only planets we can see are very close to us, and the stars are very far away, so we tend to say that stars twinkle and planets do not even though it is not the composition that determines whether they twinkle.
Yes, dark matter can cause twinkling, and the further the object is, the greater will be the twinkling.
Planets do not twinkle because they reflect light, which already comes from a stable, non-shimmering light source like a nearby star.
That nearby star would be our own sun, that's why we can see heavenly bodies in space, in our solar system. (I don't know how it works with observing planets in other solar systems or galaxies which aren't light up by our sun.)
I think the question doesn't offer logical anwsers.
The last three choices are factually inaccurate. Planets do NOT emit light by themselves, they only reflect light that hits them from the sun. And planets are not a constant distance from the earth.
The planets in the solar system revolve around sun which is a star....And the other stars are far away from us compared to planets in solar system...So..
None of the statements are true. Stars are certainly further away but are not necessarily less bright. Sirius is certainly brighter than Uranus or Neptune
Stars are self luminous unlike planets which glow in borrowed light from the Sun. Our own solar system provides the explanation.
Twinkle, twinkle, little star How I wonder what you are?
Stars twinkle at night because they are so far away from Earth that when light from the stars passes through the atmosphere, it is bent countless times due to refraction, making it look like as if they were blinking. The sun and other planets, however, are quite close to us (relative to the stars), and thus appear like disks.
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As a beam of starlight hits the atmosphere, it gets refracted in some direction. But the atmosphere is a turbulent place, so a moment later the original path disappears and the beam takes a similar but different direction. From the same place, a person would notice a shift in brightness, or position (the twinkling effect).
Stars are very far away (basically points), so a shift in position or brightness is very obvious. However, when considering a planet or other closer object in the night sky, the image is too large to notice a minuscule change. Therefore, these objects do not twinkle.