# Satellites # Space stations - [[Worlds Trade Centers]] # Lagrange points (LP) ## Sun-Earth LPs A three-body system is chaotic, but is relatively stable when one of the masses is much smaller than the other two. Stable points from this approximation are known as *Lagrange Points*. https://map.gsfc.nasa.gov/ContentMedia/lagrange.pdf ### L1 L1 is situated approximatively 1.5 million kilometers from the earth, towards the sun. Earth radius is 6,371 km. The radius of the Earth seen from L1 is 0.00007413 rad. ### L2 L2 is approximately 1.5 million kilometers from the earth, away from the Sun. Earth radius is 6,371 km. The radius of the Earth seen from L2 is 0.00007413 rad. It took James Webb Telescope 30 days to reach L2 (https://www.space.com/21925-james-webb-space-telescope-jwst.html), with a mass of 6500kg. ## Earth-Luna LPs