In 1987, humanity observed the closest supernova since 1604.
From 165,000 light-years away, the core of a giant blue star collapsed.
The first signals detected were neutrinos: they arrived in a burst lasting about 12 seconds.
Hours later, light arrived, indicating a supernova collapse.
Next, we carefully observed the expanding and developing remnants.
In the suburbs, gas shells that exploded centuries ago continue to expand.
Inside, supernova shock waves heat a spherical halo of matter.
Energy injection causes irregular changes in brightness and X-ray and radio emission.
But the inner region of this explosion remains mysterious.
The collapsed core should create a massive remnant: a neutron star.
A similar supernova in 1054 gave rise to the Crab pulsar that exists today.
However, there is no neutron star associated with SN 1987a.
However, there are two pieces of evidence that suggest one of them may be developing.
ALMA observations reveal huge amounts of gas and internal dust.
The central “hot spot” indicates the presence of a newborn neutron star.
Now, the James Webb Space Telescope has joined in, offering its unique views.
Newly revealed features include the appearance of “crescents” in the gas.
Are they regular projectiles or shapes sculpted by magnetic fields?
The evolution of the supernova remnant will eventually reveal the object contained within.
We may be witnessing the formation of the newest pulsar of our local cluster.
Mostly Mute Monday tells an astronomical story with pictures, visuals, and no more than 200 words.