The U.S. has finished constructing a huge physics experiment aimed at recreating conditions at the heart of our Sun.

The U.S. National Ignition Facility is designed to demonstrate the feasibility of nuclear fusion, a process that could offer abundant clean energy.

The lab will kick-start the reaction by focusing 192 giant laser beams on a tiny pellet of hydrogen fuel.

To work, it must show that more energy can be extracted from the process than is required to initiate it.

Professor Mike Dunne, who leads a European venture that is also pursuing nuclear fusion with lasers, told BBC News that if NIF was successful, it would be a "seismic event".

"It would mark the transition for laser fusion from 'physics' to 'engineering reality'," he said.

Click here to read the rest of the article on BBC.com and learn how scientists plan to make a "star on earth"

— For more information, visit the National Ignition Facility & Photon Science