A solar observatory is an observatory that specializes in monitoring the Sun. As such, they usually have one or more solar telescopes.The Einstein Tower was a solar observatory in the Albert Einstein Science Park in Potsdam, Germany.Solar observatories study phenomena associated with the Sun. The Sun, being the closest star to earth, allows a unique chance to study stellar physics with high-resolution. It was, until the 1990s, the only star whose surface had been resolved.