I'm in 11th and I took a gap year after 10th due to covid.
CU Boulder has a great program for that and is a very good college to be at, that's where I would recommend you look into.
Try university of Texas at Austin, it is a really good astronomy school.
Hey! And where are you from?
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In the USA there is the University of Wisconsin-Stevens Point, Canisius College, South Dakota School of Mines & Technology. In fact, there are many universities in the world with a suitable niche. You should ask the question more precisely