Why Orbit the Fixed Points?

Why Orbit the Fixed Points?

To address this question, it is important to first give an idea of why one would wish to send a spacecraft mission to the vicinity of a fixed point of the rotating earth-sun system. Here are a couple of reasons:

Then why orbit a fixed point instead of maintaining the spacecraft position at the point itself? There are several reasons with varying degrees of subtlety. Here is one example:

Intense radiation from the sun interferes with data transmission if the spacecraft sits directly between the earth and sun.

Orbiting fixed point L1 (shown below) at a convenient radius solves the data transmission interference problem.

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