Finding the winter hexagon (and maybe your birthday star)
…in the night sky, Sirius. It’s “only” about 8 and a half light years away, which means that its starlight—traveling at the speed of light, 186,000 miles a second—takes eight…
…in the night sky, Sirius. It’s “only” about 8 and a half light years away, which means that its starlight—traveling at the speed of light, 186,000 miles a second—takes eight…