Remember the spectacle of this giant telescope discovered in a mountain ring valley in China just a few years ago? Well, the five hundred-meter spherical radio telescope (FAST) has already picked up a mysterious cosmic signal known as the rapid burst of radio.
Fast radio bursts, or FRBs, are short but powerful impulses of energy from distant parts of space. The first one was spotted in 2007 and we are constantly finding more of them.
While astronomers have recently made exciting advances in tracking FRBs, we simply do not know exactly what these signals represent or how they originate. It may be caused by black holes or neutron stars called magnets.
What is exciting about FAST detection is that this fast radio is a repeater. The original is officially known as FRB 1
Researchers note that the signal took about 3 billion light-years across the universe to reach us.
FAST joined FRB 121102 on 30 August before recording dozens of later pulses (more than 20 pulses were detected on a single day, September 3). So, this looks like a particularly robust FRB.
The 19-beam FAST receiver is particularly sensitive to radio signals covering the 1.05-1.45 GHz band and this makes it ideal for monitoring FRB 121102. 
The more observations we can make of these FRBs, the more the better our chances of knowing exactly what they are. One idea is that FRBs are produced by the decay of the bark of some types of neutron stars.
Another hypothesis states that different FRBs actually have different reasons, which may explain why FRB 121102 is repeated and others do not appear to do so. At least we're getting better at pointing out where these mysterious bursts of electromagnetic radiation originate.
We can now add the data collected by FAST to our growing database of these most intriguing cosmic phenomena. The telescope team has already succeeded in eliminating aircraft and satellite interference from their measurements.
"I just think it's so incredible that nature produces something like this," physicist Ziggy Pleunis of McGill University told ScienceAlert after helping detail eight new FRBs in a paper released last month.
"I also think there is a lot of important information in this structure that we just have to figure out how to code and it was a lot of fun trying to figure out what that was. "