Space rendezvous is a precise orbital maneuver, which requires two spacecrafts to arrive at the same orbit, and move at the same speed. Since the orbital velocity is usually not less than 7 km/s, a 1-second error will case a distance of 7 kilometers between the spacecrafts. Such an error is unacceptable, as rendezvous is a prerequisite of docking, which requires spacecrafts to rendezvous as close as some dozen meters. Initially, astronauts were not aware of principles of the space mechanics. Engineer André Meyer says that “to catch something on the ground, one simply moves as quickly as possible ...
Essays on Orbital Velocity
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Introduction
The orbital velocity of the earth can be calculated in reference to other objects in space such as stars. A spectrum of the object can be used because the Doppler shift of the earth’s movement can be measured. The earth is moves closer to objects during one half of its orbital path. This is recorded on the spectrum as red shifted light. On the half of its orbit it is moving away from the object and the spectrum measures this movement as blue-shifted light.
Objective
This experiment uses the star named Arcturus to measure the spectrum shift during earth’ ...
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