1. This giant shade is designed to block the light of a star so that astronomers can take pictures of its planet.
It works a bit like holding your hand up to block the sun so you can see on a really bright day.
2. By blocking out light from the star, a telescope would be able to see the planets that orbit it.
Directly imaging exoplanets, rather than just inferring their existence through other means, would give us a much better insight into what the planets are like and, crucially, whether they could be habitable or not.