A new episode of The Nature of Things airing Sunday features University of Calgary researchers and Calgary members of the Alberta Aurora Chasers Facebook group.
The episode, which was filmed outside of Yellowknife, is titled The Wonder of the Northern Lights and “explains it all” when it comes to aurora borealis, including Steve, a newly discovered, aurora-related, night sky phenomenon which went viral in 2017.
“Often times it’s reported that the earth’s magnetic field traps electrons from the sun and they spiral down the magnetic poles and they cause light,” says Eric Donovan, a U of C professor in physics and astronomy and co-director of the Aurora Imaging Group. “That’s the kind of pithy explanation of the aurora that you find in books and in media. It’s not true, it’s not right. It’s completely wrong, actually.”
Donovan studies the magnetosphere, a windsock-shaped region of space around the Earth which is created when the solar wind interacts with Earth’s magnetic field. It is particles and processes there that create aurora borealis. “People like to say I study the aurora, but I don’t really,” he says. “I’m a magnetospheric guy and the aurora is my instrument. And the cameras are the way I read the data off my instrument.”
From left: Chris Ratzlaff with David Suzuki and Eric Donovan during filming of a new episode of The Nature of Things about aurora borealis. The episode airs Sunday, Jan. 13.
Donovan is one of three U of C researchers featured in the TV episode, which also features the Alberta Aurora Chasers, a Facebook group of amateur photographers and enthusiasts. It was a meeting between the chasers and Donovan that led to the viral discovery of the night sky phenomenon titled Steve.
“It’s a new night sky phenomenon that amateur night sky watchers and photographers knew about, but we didn’t,” says Donovan.
“We weren’t the first to see the phenomenon,” adds Chris Ratzlaff, one of the co-founders of the now nearly 19,000 strong Alberta Aurora Chasers. “It was seen around the world for years, decades, probably centuries. What we did is help the scientific community recognize it.”
Donovan met with members of the Alberta Aurora Chasers group, including Ratzlaff, after attending a 2016 talk by a NASA scientist in Calgary. The chasers showed pictures to Donovan of a bright, purple streak of light in the sky they had seen during aurora sightings, which “they called the proton arc.” Donovan convinced them …read more