No Since 1604 Human eyes have seen a supernova directly.
However, two Milky Way supernovae occurred later.
Cassiopeia a A central collapse supernova in the galactic plane occurred between 1667-1680.
G1.9+0.3Occurred in 1868, near the center of the galaxy.
Only discovered in 1947, Cassiopeia A is the brightest radio source beyond our solar system.
In visible light, there is little to see: like a fast-fading firework.
In X-ray light, its hot gases glow brilliantly.
However, infrared views are more transparent, showing various components and turbulent knots.
till the end, Comments by JWSTWith both NIRCam And MIRIThere are Now public.
Only ~350 years old, remains Already across 10 light years.
„Shell” of Ejecta 1.5% expansion at the speed of lightJets reach almost ~5% of the speed of light.
Locally, „bubbles” appear, providing evidence of this Basic form of gas distribution.
Incredibly bright near-infrared regions highlight dense filaments of hot material.
The layers of the exploding star are now colliding with the surrounding atmospheric material.
Explosive discharge Reveals many elements: They contain oxygen, neon, argon, calcium and phosphorus.
Mid-infrared „wisps” provide clues to how collapsing stars eject material.
with Hydrogen is lowThis shows how diverse supernovae can be.
Mostly Mood Monday is an astronomy story with pictures, visuals and no more than 200 words.