Space Exploration Timeline

<see whole timeline

OSO 1 telescope

Mar 7, 1962 – Oct 7, 1981

First orbital solar observatory.

https://en.wikipedia.org/wiki/Orbiting_Solar_Observatory

Includes events (2):
Mar 7, 1962
Launch of OSO 1 (OSO A). First orbital solar observatory.
More
Oct 7, 1981
Re-entry date of OSO 1 (OSO A)
More