About physics and cosmonautics

On 22 December 2019 at 6:55 AM EST, Starliner was cleared to reenter the Earth's atmosphere.  A 55 second deorbit burn started at 7:23 AM EST. Service module separation occurred at 7:26 AM EST and entered Earth's atmosphere at 7:41 AM EST.   The heat shield jettisoned and the drogue-chutes deployed at 7:53 AM EST main parachutes deployed at 7:54 AM EST. [ citation needed ]  The Starliner touched-down at  White Sands Missile Range  successfully at 7:58:02 AM EST.

A halo orbit is a periodic, three-dimensional orbit near the L1, L2 or L3 Lagrange point in the three-body problem of orbital mechanics . Although the Lagrange point is just a point in empty space, its peculiar characteristic is that it can be orbited. Halo orbits can be thought of as resulting from an interaction between the gravitational pull of the two planetary bodies and the Coriolis and centrifugal accelerations on a spacecraft. Halo orbits exist in any three-body system, e.g., the Sun – Earth –Orbiting Satellite system or the Earth– Moon –Orbiting Satellite system. Continuous "families" of both Northern and Southern halo orbits exist at each Lagrange point. Because halo orbits tend to be unstable, stationkeeping is required to keep a satellite on the orbit. Most satellites in halo orbit serve scientific purposes, for example as space telescopes . https://en.wikipedia.org/wiki/Halo_orbit JWST trajectory and halo orbit Halo orbit around L2 ...