The system is called J1721+8842, and it was first discovered in 2017.
Furthermore, the team posits that light traveled through the lens in a zig-zag pattern.
Gravitational lensing wasproposed by Einsteinas early as 1912.
The galaxy cluster Abell 370, a gravitational lens 4 billion light-years away.Image: NASA, ESA, and J. Lotz and the HFF Team (STScI)
Sometimes, gravitational lenses form rings of light in the sky, which are called Einstein rings.
The constant is different depending on how you calculate it, a problem known as theHubble tension.
Besides the insights they can provide, the lenses deserve recognition in their own right.
A graphic showing the source and double lens of the system. Graphic: Dux et al. 2024
J1721+8842 is an Einstein zig-zag in spaceI mean, that justsoundscool as hell.
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As for the Moon, not so much.
