The world's most powerful space telescope on Saturday blasted off into orbit, headed to an outpost 1.5 million kilometres (930,000 miles) from Earth, after several delays caused by technical hitches.
The James Webb Space Telescope, some three decades and billions of dollars in the making, left Earth enclosed in its Ariane 5 rocket from Kourou Space Centre in French Guiana.
This was key, since placing the spacecraft in orbit helps economise on the fuel the telescope will need to reach its final destination and perform well after that.It is set to beam back new clues that will help scientists understand more about the origins of the Universe and Earth-like planets beyond our solar system.
Once the rockets have carried Webb 120 kilometres, the protective nose of the craft, called a "fairing", will be shed to lighten the load. Crew on the ground were to know whether the first stage of the flight was successful about 27 minutes after launch.
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