Hubble Space Telescope observed the variable star RS Puppis over a period of five weeks, showing the star growing brighter and dimmer as it pulsates. These pulsations create a phenomenon known as a light echo, where light appears to reverberate through th

Hubble Space Telescope observed the variable star RS Puppis over a period of five weeks, showing the star growing brighter and dimmer as it pulsates. These pulsations create a phenomenon known as a light echo, where light appears to reverberate through th