Discovering Exo Planets

The first discovery of an exo planet comes from arasebo because it was listening to a pulsar. This one pul star had a planet around it, which tugged on the polsar and changed its signals. And this was the first clue we had that there actually were planets around other stars. Now, because we have better telescopes, wan we've study that same system in gory detail. There are actually three planets around that polsar, and they're all really closely packed into this crazy pulsar. One of them is really tiny, is like two % of the of the earth. But two other planets around this polsar are four times the mass of