File:Ghostly Stellar Echoes in Supernova Remnant Cassiopeia A.jpg - Wikimedia Commons
Light echoes from SN 1987A | ESO
Echo Mapping” Light Bursts From Supermassive Black Holes in Faraway Galaxies to Measure Vast Cosmic Distances
Light Echoes Reveal Exploded Stars | Space
Hubble sees light echoes of supernova explosion in distant galaxy | CBC News
Light echo - Wikiwand
In Light Echoes, a Glimpse of the Cosmic Past
ESA - Hubble watches light echo from mysterious erupting star
ESA - Latest views of the V838 Monocerotis light echo from Hubble
Light Echoes Give Clues to Protoplanetary Disk | NASA
Light echo - Wikipedia
Anatomy of a light echo | ESA/Hubble
Light echo - Wikiwand
Press Release - Supernova Remnant Cassiopeia A: Decoding Light to Uncover the Mystery of its Birth - Subaru Telescope
Light Echo From Behind a Black Hole Confirms Einstein's Theory of General Relativity
V838 Light Echo: The Movie - YouTube
The evolution of the light echo around V838 Monocerotis (fulldome) | ESA/Hubble
Light Echo from Star V838 Monocerotis
Join the Hunt for Supernova Light Echoes - Sky & Telescope - Sky & Telescope
Lichtecho – Wikipedia
Astronomers spot 3,000 light-year 'light echo' of dying supermassive black hole | Space
The Expanding Light Echo of Red Supergiant Star V838 Monocerotis
A Hitchhiker's Guide to Space & Plasma Physics — Evolution of the light echo around V838...
The Light Echo Around V838 Monocerotis Reveals Dramatic Changes over a Decade
In Light Echoes, a Glimpse of the Cosmic Past
Researchers see light 'echo' around black hole for first time, proving Einstein right
