November 17
V838 Monocerotis Light Echo
Observed in 2005
This image captures a light echo from the star V838 Monocerotis. After the star brightened temporarily, light from that eruption began propagating outward through a dusty cloud around the star. The light reflects or "echoes" off the dust and then travels to Earth.
Image credit: NASA, ESA, Hubble Space Telescope