I built a Telescope, how do I start my space program?

I'm playing Oxygen Not Included, and I have just breached the surface of my rocky prison, revealing... SPAAAAAACE!.
The research tree has a bunch of rocket-based items available, and I've already researched "Basic Rocketry". What I'm curious about is how to actually unlock a destination? I've had a dupelicant working on the telescope for several cycles at this point, but he seems to have made no progress.
Do I just need to hurry up and wait? Or is there something else about my Space Program I'm leaving out?
*Playing Quality of Life III update
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James Webb Telescope Terrifying Discovery Before The Big Bang
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