Make that 100 apparent years ago, as Cas A the new neutron star is 11,000 light years away. Amazing isn't it what Astronomers can figure out from photographs alone?
Superfluidity, Superconductivity, Lasers and quantum Hall effect are the 4 ways we can see the quantum world here in the size range of the Macroscopic. Together they represent the largest field of Nobel Prizes in Physics.
Here's the amazing thing, from photography alone Astronomers have deduced the CORE of this recently created Neutron Star is in Superfluid form. You can read the details here at Space.com and here at Universe Today.
In the photograph of Cas A above, "a composite of X-rays from Chandra (red, green, and blue) and optical data from Hubble (gold) of Cassiopeia A, the remains of a massive star that exploded in a supernova. Inset: A cutout of the interior of the neutron star, where densities increase from the crust (orange) to the core (red) and finally to the region where the "superfluid" exists (inner red ball)."
CREDIT: X-ray: NASA/CXC/xx; Optical: NASA/STScI; Illustration: NASA/CXC/M.Weiss