Something HUGE is unfolding for NASA's James Webb Space Telescope. In a recent test, the spacecraft fully deployed its iconic primary mirror into the same configuration it will have in space. Why this test is key to a successful mission: https://go.nasa.gov/2JLZuTP | NASA - National Aeronautics and Space Administration

1.4K shares · 106 comments | The differences between the Hubble Space Telescope and the James Webb Space Telescope will amaze you! | Science Channel | Facebook