Every second, one of the universe's stars explodes. And every night, hundreds of explosions are captured by the Zwicky Transient Facility (ZTF) telescope facility in California.
Of these, a handful are estimated to be supernovae – among the most violent events in the universe.
Since the project began seven years ago, ZTF has discovered and classified more than 10,000 supernovae.
Astronomers from all over the world are helping with the classification. The most diligent of all is Swedish Jesper Sollerman, professor at Stockholm University, who is responsible for thousands of them.
"Due to the time difference between the USA and Europe, I wake up to a new batch of observed objects every morning. For the past six years, I have invariably drunk my morning coffee while browsing through supernova candidates," Sollerman says in a press release.
