Exotic Objects A black hole’s gravity is so strong that light can’t escape. But every time I see a photo or an illustration there is something streaming in or out of it. How is this possible?
Exoplanets, Planets, Solar System Venus has a weak magnetic field. Being much closer to the Sun than Mars, why has the solar wind not eroded its atmosphere?
Galaxies, Milky Way The Milky Way and Andromeda galaxies are approaching each other. With current technology, how long would it take before we could directly measure the apparent increase in size of Andromeda?
