According to a new study, gravity can create light, all on its own.

The study, which was published in the journal Physical Review Letters, was conducted by a 

team of researchers from Stanford University and SLAC National Accelerator Laboratory. 

The researchers found that when electrons are accelerated in 

a strong gravitational field, they can emit light.  

This is because the gravitational field can cause the electrons to vibrate,  

and this vibration can create electromagnetic waves, which are the same waves that make up light. 

The researchers believe that this process could have been important in the early universe. 

They believe that the gravitational waves that were created during the 

Big Bang could have caused electrons to vibrate and emit light, 

which would have helped to create the first stars and galaxies.