See A Star Shrink And Swell Right Before Your Eyes

Watching a star physically change in a matter of a week is something you’d think impossible to see. On the contrary. The star Eta Aquilae (AY-tuh AK-will-uh), located just down the block from the bright star Altair in the Summer Triangle, brightens up and then fades into the background every 7.17 days. And it does…
Read More