The telescope left Earth enclosed in a rocket, which blasted off from French Guiana. The revolutionary instrument could help scientists discover extraterrestrial life.
NASA's revolutionary James Webb Telescope launched into space successfully on Saturday from French Guiana.
The instrument is expected to help scientists in the search for new planets and traces of extraterrestrial life.
"We are expecting to see the first stars and galaxies of our universe, those that formed right after the Big Bang ... and we are going to be looking at planets around other stars and trying to search for Earth 2.0," NASA scientist Stefanie Milam told DW.
The telescope is now on its month-long journey to its final destination in solar orbit, which is roughly 1 million miles (1.6 million kilometers) from Earth.
Hurtling through space after flawless launch
The $9 billion rocket blasted off without a hitch inside the French-built Ariane 5 rocket from the European Space Agency's launch base in the South American territory of French Guiana.
European Space Agency Director-General Josef Aschbacher told reporters the take-off was "a very exciting moment" for his organization. "Team Europe has delivered," he added.
Over half a million people watched the Christmas Day launch live on NASA's Youtube feed.
NASA tweeted the moment when after 27 minutes the space telescope broke away from the French rocket.
The most technologically advanced space observatory ever made will now course its way through our solar system toward the sun's orbit.
Once it gets there it will take five months to become operational. Before James Webb's infrared eyes become active, it will need to unfurl its solar shield and enormous mirrors.
"We are going to discover incredible things that we never imagined," NASA administrator Bill Nelson said after the successful liftoff.
But he warned that "there are still innumerable things that have to work and they have to work perfectly ... we know that in great reward there is great risk."
Looking over 13 billion light years into the universe