National Geographic News

Light Echo

Photograph courtesy NASA/ESA/Hubble Heritage Team (STScI/AURA)

A pulse of light emitted in 2002 from a red supergiant star called V838 Monocerotis illuminates a cloud of interstellar dust. The dramatic whorls around the central star are trillions of miles across and were unknown to scientists until Hubble snapped this image in 2004.

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