How One Supernova Measured The Universe

References:
DEJA VU ALL OVER AGAIN: THE REAPPEARANCE OF SUPERNOVA REFSDAL

Predicted properties of multiple images of the strongly lensed supernova SN Refsdal

Multiple Images of a Highly Magnified Supernova Formed by an Early-Type Cluster Galaxy Lens

Irwin I. Shapiro (1964). "Fourth Test of General Relativity". Physical Review Letters. 13 (26): 789–791. doi:10.1103/PhysRevLett.13.789

Irwin I. Shapiro; Gordon H. Pettengill; Michael E. Ash; Melvin L. Stone; et al. (1968). "Fourth Test of General Relativity: Preliminary Results". Physical Review Letters. 20 (22): 1265–1269. doi:10.1103/PhysRevLett.20.1265

Research & Writing by Stephanie Hamilton, Ralph Crewe, Petr Lebedev, Derek Muller, and Jonny Hyman
Animations & VFX by Jonny Hyman & Ivy Tello
Thanks to Jaime Portsmouth for his gravitational lensing simulator and help enabling it to render simulations.
Supernova simulations courtesy of Adam Burrows
Numerous hubble images by Hubble Legacy Archive, NASA/ESA/STScI
Numerous images by ESO / NASA

[lukaswenzl]

It is awesome to see you talk about such current research in Astrophysics. As a Phd student who grinds these papers every day it is a joy to see you manage to share these concepts so understandable and yet very accurately. It is a joy to watch!

[alfredoalfaro]

One of the few youtubers that always produces top notch content is now pouring it en masse! Guess not all is bad for 2020.

[miketacos]

“Hey did you catch the supernova? If not, no worries, they’ll play re-runs in a year. Or twenty.”

[rarsn]

This blows my mind. I've always understood the concept of how objects in the sky are so far away that it takes a long time for the light to reach Earth, as if we're looking into the past. But I never considered the fact that objects between us and what we're observing could distort our observation. Science never ceases to amaze me.

[AverageAlien]

This is the kind of content that needs to be on the trending tab

[aurigo_tech]

That is legitimately mind blowing. To see the exact same event not just on multiple places, but also at different times. And not only twice but six times? Imagine that in an ordinary world setting. Literally deja vu.

[ninadn]

Teacher in online class: why are you late?
Me: gravitational time delay.

[booksandvideos]

The fact that there are multiple images of the same galaxies, delaying the light that arrives to us at different intervals is blowing my mind. I never knew something like this exists. It's cool to keep learning new things about space that continue to astound me. I'll never get tired of it.

[nimac]

Its incredible how much info scientists can extract from these tiny little smears of light

[bassett_green]

"Do you notice that the same galaxy appears three times in the image?"
Yeah I *totally* noticed

[decorator_name]

Gravitational lensing makes things show up at different places AND at different times. Now that's cool
!

[rustusandroid]

The more we learn, the crazier the universe becomes.

[ChathuraJayasundaraIMD]

Quality or Quantity, choose one and choose wisely

Derek from Veritasium: I choose them both
❤️❤️❤️❤️

[austin]

Even got the updated Betelgeuse distance from just this week

Nice touch

[evandotpro]

This absolutely blew my mind. I expected nothing less from you, Derek. Thank you for everything you do.

[biggiecheese]

this makes me think about how lucky we are in the universe, we have perfect solar eclipses, we have a bunch of planets in our solar system, and we got a perfect view on a duplicated supernova and its host galaxy to go with it.
I can't believe how you get all this information, and how you teach it so well

[ChrisInmanDrums]

I watch these videos now with renewed excitement and interest. I finally started at University of as a Physics student after years of watching videos by channels like this, which eventually led to my passion developing to the point where I had to take it more seriously. Crazy to think that, despite officially leaving education years ago, YouTube channels like Veritasium would take me back purely out of a genuine interest that I never felt for any subject when I was actually in school. The point of this comment is to say thank you for the inspiration!! And to keep this sudden flood of videos coming! :D

[Dillinger]

My 5 year old nephew loved watching this, he had an endless list of questions for me during & after lol.. He can't even sit for 2 minutes for his online kindergarten classes but he can sit still through this entire video.. Well done man.

It is so refreshing that somebody not just asks more questions, but answers the ones I was never even asked, but always wanted to know!

[Localguitarman]

Bless this man, he's putting out so much quality content for us