The James Webb Space Telescope will be largest and most powerful observatory ever launched. After 25 years of development, it will launch atop a fireball, unfold and unfurl its enormous structure into a precisely aligned view piece looking across the galaxies and back to the beginning of time. So let's party!

• Rocket: European Space Agency (ESA) Ariane 5 ECA
  
• Payload: James Webb Space Telescope
• Partners: NASA, ESA, and Canada Space Agency (CSA)
• Destination: Sun-Earth second Lagrange (L2) orbit
• Launch Site: Arianespace's ELA-3 complex, European Spaceport near Kourou, French Guiana
• Launch Window: December 25, 2021 7:20am to 7:50am EST (UTC -05:00)