Why do star in the night sky blinks and shining?


I don’t get what a ‘star’ mean.
Does it mean like our sun but in another galaxy? or other planets outside earth?
Why does it blinking and shining?
What will I see if I zoom to the blinking star?
Considering it’s the night sky and the stars can be seen clear.

Just some thoughts.

A star is like our Sun in that the vast majority are gigantic fusion reactors turning hydrogen into helium and other heavier elements through the process of nuclear fusion. Our galaxy is a relatively modest galaxy with only a few billion stars in it. There are several hundred billion galaxies and many of them contain tens- to hundreds- of billions of stars. Look up the “Hubble Deep Field” on Google. Each point of light you see in that picture is a galaxy containing billions of stars.

Stars blink and shimmer because of turbulence in Earth’s atmosphere. Just like when you see the shimmer in the air above a road on a hot day, as warm air rises and cool air descends in the atmosphere it creates waves of turbulence. That atmospheric turbulence is a problem for astronomers. The best ground-based telescopes use software and adaptive optics to counter the twinkling effect. The best way to get around that is to have the telescope completely above the atmosphere — like the Hubble.

If it’s a true star, you’ll see a twinkling light. You can’t resolve a star to anything greater than a point of light. If it’s a planet (e.g. Mars or Jupiter) and you have a reasonable telescope (Galileo did just fine with a 16x scope but he didn’t have to contend with light pollution) you’ll be able to see a few features of the planet.

While you’re looking at those stars try to keep this in mind: There are more stars in our galaxy than there are grains of sand on all of the beaches on Earth. There are more galaxies than there are stars in our own galaxy. Our star has eight major planets and several more minor planets (Pluto, Eris, Sedna, Quaorar, Ceres, etc). We have found about 420 other planets just in our own galaxy. It is likely that MOST stars in fact have some kind of planetary system.

On our planet we live on a crust that is as thin as a ping pong ball relative to its size. We are separated from a ball of molten rock 24,000 miles in diameter by a crust that is just a few miles thick. There is a thin envelope of gas that is so thin no human can survive above about 26,000 feet for more than a few hours. That thin envelope of gas is all that stands between us and EVERYTHING ELSE IN THE UNIVERSE. It is a truly amazing thing to gaze into a telescope and appreciate just how wonderful it all is and just how fragile we really are.

yes a star is similar to our sun,in fact our sun is a star…there are many different kinds of stars,usually the differences in stars have to do with size and age.The stars appear to blink mainly due to dust and dirt in our atmosphere although starlight can vary due to planets orbiting or because of the stars rotation or interstellar dust

When someone asks you why Stars blink, just say E=mc square..

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