The Violent Birth of a Magnetar
6/17/202645 min
NASA’s Fermi Gamma-ray Space Telescope has captured the first definitive evidence of high-energy gamma rays coming from a superluminous supernova — one of the most powerful stellar explosions in the universe.
Scientists studying the event SN 2017egm believe its extraordinary brightness is driven by a newborn magnetar, an ultra-dense neutron star spinning at extreme speeds with an intense magnetic field.
The discovery helps explain how these explosions generate enormous amounts of energy and offers a new way to study the physics of collapsing massive stars and the extreme environments created in their aftermath.
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This episode includes AI-generated content.
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First 90 secondsSpeaker 10:00
[gentle music] Welcome to Bedtime Astronomy. Explore the wonders of the cosmos with our soothing bedtime astronomy podcast. Each episode offers a gentle journey through the stars, planets, and beyond, perfect for unwinding after a long day. Let's travel through the mysteries of the universe as you drift off into a peaceful slumber under the night sky.
Speaker 2· Host0:24
I want you to imagine, uh, just for a second, that you are standing outside.
Speaker 3· Host0:31
Okay.
Speaker 2· Host0:31
Like, on a perfectly clear, perfectly dark night. You look up at the night sky, and you see the familiar constellations.
Speaker 3· Host0:39
Exactly, the usual stuff.
Speaker 2· Host0:40
Yeah, just the dusting of the Milky Way. [laughs] The quiet, ancient light of billions of stars. And then- To nowhere. Exactly. Without any warning, a single point of light in that sky just suddenly ignites.
Speaker 3· Host0:54
Oh, yeah.
Speaker 2· Host0:54
And it doesn't just twinkle or get a little brighter, it flares up with such absolute overwhelming violence that this one single star outshines everything else around it.
Speaker 3· Host1:05
It's hard to even picture.
Speaker 2· Host1:06
It is. I mean, in fact, it outshines the billions of other stars in its entire host galaxy combined.
Speaker 3· Host1:12
Which is just, um... It is a scale of brightness that the human brain really truly struggles to comprehend.
Speaker 2· Host1:17
Right.
Speaker 3· Host1:18
Because when we think of something bright, we think of, I don't know, a spotlight or maybe staring directly at our own sun.
Speaker 2· Host1:23
Sure, yeah.
Speaker 3· Host1:23
But we are talking about a single, solitary stellar object- Mm ... broadcasting so much luminous energy