Question

how are the star appearing in the sky​

Answer 1

A group of billions of stars make up a galaxy whereas a small group of stars that appears to form an imaginary pattern where when viewed from the earth to the sky

the twinkling of stars at night sky is down to the earth atmosphere as light from the stars travel towards earth it is easy to move a straight line but it travelling through the earth's atmosphere it gets bounds around in the difference directions by the air

for astronomers this twinkling can be a huge problem especially when they are trying to accurately image a particular star the more the star twinkles the blurrier the image