If you've never heard of a neutron star, prepare to have your mind blown. These celestial bodies have a number of extreme properties -- an incredibly fast rotational speed, super-dense mass and unbelievable gravitational pull -- compared to Earth, or even our own sun.
YouTube science channel Kurzgesagt, which is German for "in a nutshell," explains the incredible properties of a neutron star. "They're like giant atom cores," the video explains, "unbelievably dense and violent." Learn something new about this wonder of space below:
Sarah Gray is an assistant editor at Salon, focusing on innovation. Follow @sarahhhgray or email firstname.lastname@example.org.