By Dr. Ethan Siegel Although Saturn has been known as long as humans have been watching the night sky, it’s only since the invention of the telescope that we’ve learned about the rings and moons of this giant, gaseous world. You might know that the largest of Saturn’s moons is Titan, the second largest moon […]
Archive for 'NASA’s Space Place'
By Dr. Ethan Siegel Littered among the stars in our night sky are the famed deep-sky objects. These range from extended spiral and elliptical galaxies millions or even billions of light years away to the star clusters, nebulae, and stellar remnants strewn throughout our own galaxy. But there’s an intermediate class of objects, too: the […]