Do all the stars in the sky move ? Explain.

Which of the following is the brightest star in the sky ?

a) What property do all elements in the same column of the periodic table as boron share? b) What property do all elements in the same column of the periodic table as fluorine share?

What are sky waves ?

Fill in the blanks. A group of stars that apperas to form a pattern in the sky is known as a ………………….