The James Webb Space Telescope (JWST) has cleared final checks and is slated for launch later this year.

The 7.2-ton observatory promises to peer further into space, and our universe's past, than ever before.

Today on All Sides with Ann Fisher: what astronomers hope to discover about the infant universe, signs of life on other planets and more.

Guests:

Hashima Hasan, deputy program scientist for the James Webb Space Telescope at NASA Headquarters
Prof. Scott Gaudi, Thomas Jefferson Chair of Astronomy at Ohio State University
Rivka Galchen, contributor, The New Yorker Magazine