[bgirard]

I did some research here to understand this better: https://webb.nasa.gov/content/about/orbit.html

> This [L2] orbit (which takes Webb about 6 months to complete once) keeps the telescope out of the shadows of both the Earth and Moon.

>What is special about this orbit is that it lets the telescope stay in line with the Earth as it moves around the Sun.

and

> Webb's position out at L2 also makes it easy for us to talk to it. Since it will always be at the same location relative to Earth-in the midnight sky about 1.5 million km away - we can have continuous communications with it as the Earth rotates through the Deep Space Network (DSN)

[willis936]

As did I.

https://news.ycombinator.com/item?id=29859522