hinkley 3 hours ago | next |

So what does this do to our estimates of the ratio of regular matter in the universe?

perihelions 7 hours ago | prev |

Is there an animation or blink visualization of this time evolution?

cwmoore 4 hours ago | root | parent |

There is an 11 second video across a few weeks embedded. From the caption:

"This time-lapse video using data from NASA’s James Webb Space Telescope highlights the evolution of one light echo in the vicinity of the supernova remnant Cassiopeia A. A light echo is created when a star explodes or erupts, flashing light into surrounding clumps of interstellar dust and causing them to shine in an ever-expanding pattern."