when all the stars twinkle, why not sun (which is also a star)?

Answer 1

Twinkling of stars is caused by distortions in the atmosphere. Stars are point sources so they are succeptible to this. The sun is much closer and therefore much larger in appearance and is far too large and bright to twinkle. However, you can see a distorted and wavering solar disc when it is setting over a low horizon. While this is not twinkling, it is essentially the same thing.

Answer 2

The sun does twinkle, for the atmospheric reasons mentioned in other posts. And you can see it twinkle, the only difference is that the ratio of the seeing disk of the sun, to the apparent size of the sun is essential 1, while that is not so for stars.

Answer 3

The sun twinkles, too. But don't stare at it to find out - you could go blind. The sun is a star and some of those stars you see at night could be other suns with their own planets but are so far away, they look only like small objects. But they all twinkle as we are viewing them through our own ever-moving atmosphere.

Answer 4

Twinkling is caused by atmospheric fluctuations. The Sun does, in fact, twinkle.

However, the twinkle is invisible because the amount of fluctuation caused by the atmosphere is much smaller than the size the Sun appears to be. So, the twinkling effect is essentially swallowed up inside the Sun.

At night, we see the far-away stars twinkle because the atmospheric fluctuations cause distortion that is as large or larger than these stars appear to us. So, the star is affected much more strongly by atmospheric fluctuations.

PS: The guy above me is off his rocker. All stars generate their own light.

Answer 5

Twinkling of stars is caused by distortions in the atmosphere. Stars are point sources so they are succeptible to this. The sun is much closer and therefore much larger in appearance and is far too large and bright to twinkle. However, you can see a distorted and wavering solar disc when it is setting over a low horizon. While this is not twinkling, it is essentially the same thing.

Answer 6

Sun basically twinkles but when seen from 100s of light years away. The twinkling is governed by 2 factors. The strength of the light source and the atmosphere through which it passes before being viewed. Apparently it seems to us that sun doesn't because it too close to us and too strongly luminous for our atmosphere to create that effect.

Answer 7

Stars twinkle because they rotate the same as the earth and being billions of miles off in space the rotation is a twinkle to the human eye. When the sun is in the line from its position in space from any other planet it lightens and warms them the same as our earth.

Answer 8

stars twinkling is caused by atmospheric disturbances. the stars' light bounces of moving particles. the sun is too close, and so appears too big in the sky, for this to really cause an effect. sometimes you can see it happening, like in movies when there is a shot of the sun in the desert, and the warm rising air makes the sun ripple

Answer 9

what do you mean why not the sun? as in why doesnt the sun twinkle as well? still a bit vagues but for 1 if you mean at the same time as the stars well because it would be on the other side of the planet and 2 if you mean why doesnt it "twinkle" well i usppose cause its just so big, and yeah its a star. wich means at an unknown time it will super nova and destroy humanity O.o

Answer 10

I think we're too close for any twinkling to be going on.