<p>Although it is not an Ivy, The University of Maryland College Park, where I received my BS in Astronomy, has a very strong program in Astronomy, an observatory on the campus, and a number of courses where undergraduates get hands on experience in the observatory doing projects in Observational Astronomy.</p>
<p>You probably would get a good undergrad background in astronomy and related areas of physics at any of the Ivies. In roughly this order, the strongest programs would be Princeton, Harvard, Columbia, Cornell, Yale—all highly ranked. I believe all of them would have affiliations with some of the major observatories in the US and elsewhere.</p>
<p>Other strong programs include Caltech, Chicago, Penn State, Berkeley, U Washington, Arizona, UCSC, JHU, Texas, UCLA, Wisconsin, Virginia, Wisconsin, Michigan State, Hawaii, Illinois, Colorado, Indiana, and Maryland.</p>