The History of Astronomy, the Theory of Solar System Formation

Theories of solar system formation were absolutely there and suggested there should be planets orbiting most stars out there, that was already thought as being the case. We hadn't yet observed any other planets out there orbiting any other stars until I think 94, 1994, I think that was the first time we saw it. Astronomers had to invent new techniques in order to observe the planets that they predicted and thought were there. When we cannot think of one at all pausing their my reflection, it's interesting in the history of astronomy as well," he says.