The nearby Red Planet displays remarkable changes every apparition. As Mars approaches opposition, keep an eye out for some of these differences. The post Observe Changes on Mars appeared first on Sky & Telescope.
A team of scientists says we now have an answer to one of the biggest mysteries of GW170817: after the neutron stars collided, what object was formed? The post The Aftermath of GW170817: Neutron Star or Black Hole? appeared first on Sky & Telescope.