Nearly one thousand years ago, people saw a star explode in the night sky. Centuries later, astronomers discovered the remains of this explosion, which we call the Crab Nebula.


The Ring Nebula formed after a dying star called a red giant shed its outer layers.


APRIL 2016 13


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24