Context: Two years ago, NASA launched the most advanced telescope that has been created so far, the James Webb Space Telescope or JWST.

• It is a reflecting telescope that combines curved mirrors that reflect light and form an image. The structure is actually a giant mirror of diameter 6.5 metres using which, the telescope can collect and reflect more light to see objects farther away in the universe.

• Even though the telescope was launched only two years ago, it has started to redefine how we look at the early universe.