Aperture synthesis

Aperture synthesis is like taking a bunch of pictures of something and then putting them all together to make one big super picture. Imagine you have a bunch of Legos and you put them together to make a big plane. In the same way, you can use radio telescopes to take pictures of a thing in space from different angles. Each telescope takes a picture of the thing, and then all those pictures are put together into one super picture. So just like a big Lego airplane, aperture synthesis can help us understand what things in space really look like by combining lots of smaller pictures into one big one.