Jesses Girl asked 3/13/2015 Which main-sequence stars are the most massive? A: red B: orange C: yellow D: blue
Anonymous asked 5/5/2016 what is the method of measuring the distance of star/planet /galaxy which are thousands light years away from us ? what is the accuracy?
Anonymous asked 9/25/2014 Why is it that when viewed from the surface of the Earth, stars twinkle and planets don't?