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Are there yet any instruments better than LIGO at a lagrangian point outside Earth's atmosphere and the Van Allen radiation belt?



No, there’s nothing yet. I think you‘re thinking about (e)LISA btw.



LISA: Laser Interferometer Space Antenna: https://en.wikipedia.org/wiki/Laser_Interferometer_Space_Ant... :

> LISA would be the first dedicated space-based gravitational-wave observatory. It aims to measure gravitational waves directly by using laser interferometry. The LISA concept has a constellation of three spacecraft arranged in an equilateral triangle with sides 2.5 million kilometres long, flying along an Earth-like heliocentric orbit. The distance between the satellites is precisely monitored to detect a passing gravitational wave.[2]

It also says the ESA LISA projected launch date is in year 2037.

Could 3 or 4 cubesats per cluster solve for space-based gravitational wave observation?

CubeSat: https://en.wikipedia.org/wiki/CubeSat

Li-Fi: https://en.wikipedia.org/wiki/Li-Fi

Could the gravitational wave sensors be mounted on Starlink or OneWeb ULEO Ultra Low Earth Orbit satellites with a 5 year lifecycle? (Also, how sealed and shielded do consumer radio telescopes like Unistellar's eVscope and eQuinox need to be to last a few years in microgravity? Maybe mando blackout noise.)

What is SOTA State of the Art in is it "matter-wave interferometry"?

/? matter-wave interferometry wikipedia: https://www.google.com/search?q=matter-wave+interferometry+w...

/? matter-wave interferometry: https://www.google.com/search?q=matter-wave+interferometry

Can low-cost lasers and Rdyberg atoms e.g. Rydberg Technology solve for [space-based] matter-wave interferometry?

/? from:me LIGO https://twitter.com/search?q=from%3A%40westurner%20ligo :

- "Massive Black Holes Shown to Act Like Quantum Particles" (2022) https://www.quantamagazine.org/massive-black-holes-shown-to-... :

> Physicists are using quantum math to understand what happens when black holes collide. In a surprise, they’ve shown that a single particle can describe a collision’s entire gravitational wave.

- GitHub topic: gravitational-waves: https://github.com/topics/gravitational-waves


Further notes regarding Superfluid Quantum Gravity (instead of dark energy): https://news.ycombinator.com/item?id=36258299




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