giovedì 15 febbraio 2018

# astro: we have to escape with a speed of 550 km/s

<< When a rocket is launched into space, it is thrown out with a speed of 11 km/s to overcome the Earth's gravitational pull [..] Our home galaxy, the Milky Way, is over a trillion times heavier than our tiny planet Earth so to escape its gravitational pull we have to launch with a speed of 550 km/s. >> Prajwal Kafle.

International Centre for Radio Astronomy Research. Milky Way ties with neighbor in galactic arms race. Feb 14, 2018.  


intrigante il video che simula la collisione- fusione

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