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There are hundreds of Dove Satellites with telescopes in the Flock constellations from Planet Lab: https://en.wikipedia.org/wiki/Planet_Labs

Most of them launched on the Falcon 9. They just point down to the Earth by default. ;-)

And there are other cubesats testing stuff for x-ray astronomy or gamma ray burst detection, such as:

https://en.wikipedia.org/wiki/VZLUSAT-2