why do stars twinkle?
96173
Here's what they don't teach you in advanced astro-physics:\n\nThey twinkle because they're happy, like when a puppy's tail wags.
157772
Except for stars nearest the Pole Star, all stars move in one single direction all the time --- east to west. This isn't because the stars are moving but instead because Earth is rotating.\n\nIf you're seeing stars moving 'rapidly' and 'sporadically' you're either not observing stars, or you should tell me where you're gettin' that good stuff :)
387674
You can't see the stars during the day due to a process call Rayliegh scattering.\nBasically the sun radiates many visible colours of visible light even though it looks yellow. The blue light that the sun radiates is scattered by the atmosphere in all direction whilst other colours are unaffected. This gives the sky a blue appearance during the day. The blue sky is much brighter than the stars and thus we cannot see them.\nStrange fact: It is because the atmosphere is mostly nitrogen that the sky is blue, if the atmosphere was mostly oxygen it would be green.
9670
You're probably seeing Venus and not a star. It usually rises or sets within hours of the Sun. If it doesn't "twinkle" it's a planet. Would be easier to tell you if you could report your latitude, time zone and time of observation aswell.
876832
stars are million km far away from us.it is observed that when the star is of blueish colour,they are new born when they appear yellowish they are middle aged and when stars appear reddish they are old and can burst anytime but it takes million of years to observe weather that particular star is there or not
40658
The light from the stars is distorted by charged particles and dust in our atmosphere which is in constant motion, hense the twinkling.
277115
An aurora courtain (lights in the northern or southern sky) is a phenomenon that ocurrs when our sun is in a peak of activity.\n\nEveryday, the sun, through massive explosions, sends a huge stream of charged particles to space. These particles travel at really high speeds (close to the speed of light) and, thus, hold a lot of energy. This stream is called "Solar Wind". When the sun is having a period of high activity, this "wind" is particularly strong.\n\nWhen Solar Wind reaches Earth, our planet's magnetic field changes the direction of the Solar Wind, keeping it from getting to the surface, and sending it back to space. However, at the poles, both south and north, the Solar Wind is not rejected, because of the shape of Earth's magnetic field. Instead, the stream of particles falls down to Earth describing a circular motion around the poles.\n\nThere's, then, a point in which the solar wind around the poles reaches the outer atmosphere and the falling charged particles crash with the molecules that constitute air. These collisions release energy in the form of a flash of light. The collective effect of all the different flashes creates the lights in the sky.\n\nI hope that it helps.
1029405
You've almost answered your own question:  Stars are "stationary" sources of energy (nuclear) and give off light.  Planets do not and they orbit stars.
126277
As previously stated, starts twinkle due to the atmoshpere of the earth. If you look at a distant star from outside the atmosphere it will be a far less dynamic. I'm not sure of the origins of the pentagonal shape but it was probably due to religous/social explanations from the past (Pictures of the three wise men following the pentagonal shaped north star come to mind)
211343
For When You Open Your Eyes A New Twinkle Is Highlighted Within Our Cosmos, So For ME To Percieve Those Sparkley Lights, I Wait For You Too Open Them Eyes\n\nSo Im Guessing A Lot Of Glactic Dust Is Twinkling As You Blink And Read This - I Thank You For The Twinkle\n\nAlien Love
1010582
it is the difference in brightness between the stars and any astronaut, cosmonaut, space shuttle, or international space station.  the stars are just too dim.  a much longer exposure time is needed to photograph dimmer objects.  ask someone who knows about photography.\n\nhttp://en.wikipedia.org/wiki/Photography
49829
check this site...\nhttp://www.bbc.co.uk/science/space/stars/index.shtml
933991
5. All of the above\n\nAll of those play a factor in the "twinkling" of a star
450340
They are programmed to spiral around the moon. \nThis keeps the insects evenly dispersed across the land and  helps to prevent inter-beading. But lights are brighter than the moon and fool them.\nIf you watch them move towards the light, you should notice that they spiral towards it.
779126
If you mean when it goes supernova, it's because those rays require the most energy.  As the star is exploding, it is giving off it's highest energies in greater abundance.
537296
Mainly because the sun is so much closer than any other star. The twinkling effects our atmosphere causes on other stars is simply overcome by the brute force of sunlight.\n\nDistant stars twinkle due to Earth's atmosphere, but then why don't planets also twinkle; they look to be about the same size? Here's a good explanation I cut-and-pasted for you from an astronomy website --\n\n"Just like a computer screen, your eye is composed of a certain number of 'pixels,' each represented by a single light-receptor cell in your retina. If two (or more) points of light are close enough such that they are focused on the same receptor cell in your eye, you will experience them as a single point of light. This is the 'resolution' of your eye. \n\nNow, a star on the sky is in a true sense a single point of light. All the light comes through the atmosphere in exactly the same direction, through exactly the same atmospheric turbulence, and thus is bent in exactly the same way. So when it gets to your eye, the amount of light you see varies. It also strikes (primarily) only a single receptor ('pixel') in your eye. \n\nOn the other hand, light from a planet is different. Each of a few receptors in your eye sees a large number of light rays coming from the planet, each of which has been bent differently by the atmosphere (since the planet has size on the sky, they are arriving in slightly different directions). Some of these rays will become brighter, some dimmer. But because they all illuminate the same receptor in your eye, that receptor only sees the total amount of light hitting it. There will be about the same number of enhanced rays as dimmed rays, so you experience a steady light, not a twinkle."
471007
Because stars are not very bright. In the day time, scattered sunlight makes the sky a bright blue, brighter than the stars. Even bright streetlights are enough to overwhelm the dim starlight.