Admin Administrator Staff member Mar 18, 2008 18,049 2,532 23,560 Visit site Sep 30, 2022 #1 Why are sunspots black? According to astronomers, it may be a big, cosmic optical illusion. Why are sunspots black? : Read more
Why are sunspots black? According to astronomers, it may be a big, cosmic optical illusion. Why are sunspots black? : Read more