Tag: Cassiopeia A

Conceptual astronomy illustration of a distant golden stellar flash at left and folded, translucent interstellar dust sheets at right. A narrow amber region glows within teal filaments against a dark starfield, evoking a light echo illuminating existing dust. Artistic visualization, not a telescope image or a scale diagram.

How Can We See a Supernova Again Centuries Later?

 cacophony  10/28/2026

Light echoes let astronomers recover an old supernova’s spectrum and use its radiation to map interstellar dust in three dimensions.

Continue Reading How Can We See a Supernova Again Centuries Later?