When scientists start thinking about a new space observatory, the first question is always: what new science will this telescope reveal? In other words, they outline the priorities for the 'scientific core' of the space mission. These science goals are always ambitious and are intended to make significant scientific advances. This is also the case for the JWST; it is designed to answer fundamental questions about our Universe.
The JWST is intended to solve outstanding key questions concerning our place in the evolving Universe.
In order to guide the design of the telescope and its instruments, scientists have identified five general topics as the core scientific themes for the JWST.