From a tweet by Nasa. This is an artists depiction of a black hole. Ive always found black holes amazing; theyre like parts of the universe where the universes game engine bugs out and makes weird errors.
The black half circle in the center is the black holes event horizon, where gravity becomes so strong that the escape velocity exceeds the speed of light. Its termed the event horizon because any event that occurs within it cannot be seen by nor measured by nor can it affect the outside universe.
Surround it is the accretion disk, matter spiralling into the black hole that begins to heat up due to tidal forces and friction. Finally, the expanding beam shooting out of the top is the relativistic jet: particles flung out before reaching the event horizon at absurdly high speeds.
Dextre and Arabian Nights: ISS takes bot for dreamy flight over magnificent Middle East (follow link for VIDEO)
New International Space Station (ISS) footage reveals the staggering and fragile beauty of the Middle East at night, when all the violence of the region seems to have stilled and only glimmering lights indicate the pulse of life. The time-lapse footage, showing the ISS hovering over the Middle East at night time, was released on Friday. The video also features Dextre, the spacecraft’s trusty repair-bot that completes such tasks as changing batteries and replacing cameras outside the ISS. The robot, also known as the Special Purpose Dexterous Manipulator (SPDM), reduces the need for routine spacewalks. There are currently six people aboard the International Space Station.One of the astronauts, Scott Kelly, never misses a chance to reveal Earth’s astounding beauty which just can’t be appreciated from the ground. He has posted a series of photos in his Twitter blog displaying the amazing textures of mountains and seas as seen from space. read more from RT