What is the difference between positive and negative pglo?

Pglo is a plasmid.it has a gene for a protein that is bioluminescent.positive pglo bacteria have this plasmid while negative pglo bacteria do not

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11