Why build a telescope? YOLO, as the kids say. Having decided that, one must decide what type of far-seer one will construct.

NASA's Nancy Grace Roman Space Telescope will help scientists better understand our Milky Way galaxy's less sparkly components—gas and dust strewn between stars, known as the interstellar medium.

Using the James Webb Space Telescope (JWST), astronomers have detected what appears to be a faint and small star-forming ...