Light Echo Geometry Cartoon

Light Echo from Star V838 Monocerotis

This sequence of pictures from the NASA Hubble Space Telescope's Advanced Camera for Surveys dramatically demonstrates the reverberation of light through space caused by an unusual stellar outburst in January 2002. A burst of light from the bizarre star is spreading into space...

Light Echo From Star V838 Monocerotis - May 20, 2002

Light Echo From Star V838 Monocerotis - September 2, 2002

Light Echo From Star V838 Monocerotis - October 28, 2002

Light Echo From Star V838 Monocerotis - December 17, 2002

Anatomy of a Light Echo

Location of V838 Mon in the Milky Way Galaxy

V838 Mon Before and During Outburst

Light Echo From Star V838 Monocerotis - April 30, 2002

Size of Star Relative to the Solar System

V838 Mon: Dissolve Between Images at the Four Epochs

Dissolve sequence of the four epochs (May-Dec. 2002) of the light echo of star V838 Mon. This star was the brightest star in the galaxy for a short time.

The Outburst: V838 Mon

This animation shows the sudden brightening of the star V838 Mon as it happened on Jan 2002. The star got much brighter because it expanded to a red super giant. In the foreground is a blue companion star.

V838 Mon: Flip Through Epochs

Dr. Howard Bond – First Discovered

Dr. Howard Bond – Significance

Dr. Howard Bond – Observations

Dr. Howard Bond – What is a Light Echo?