The @NASAWebb Telescope will allow us to see out to 13 billion years of cosmic time! Join our experts live now as they discuss the infrared telescope’s recent cryogenic testing & next steps ahead of launch: https://www.nasa.gov/live Have questions? Use #askNASApic.twitter.com/3kIZjxphwu
Webb will launch on an Ariane 5 rocket from an ESA launch site in French Guiana. Routine science operations start ~6 months after launch. We aren't a replacement for Hubble, more a scientific successor, so Hubble will be kept running long as possible.