BBC By Paul Rincon 3/9/2013
Nasa has completed the assembly of two booster rockets that will help power its gigantic, next-generation launch system - the SLS.
The SLS, or Space Launch System, is the rocket that will return astronauts to the Moon under the US Artemis project.
Over the course of several months, workers at Florida's Kennedy Space Center have vertically stacked the booster rockets' 10 segments.
When operational, the SLS will be the most powerful rocket in the world.
It will be capable of producing up to 8.8 million pounds of thrust, making it 15% more powerful than the Saturn V rocket that lofted the Apollo lunar missions.
The SLS consists of a huge core stage with four powerful engines at its base and the two solid rocket boosters (SRBs) attached on either side.
The two completed SRBs at Kennedy Space Center will fly on the maiden launch of the SLS - known as Artemis 1 - which is scheduled for late 2021.
More:
https://www.bbc.com/news/science-environment-56339708
