PULL · 15 JUN 2005

This was
your sky.

Cassiopeia A Light Echoes in Infrared

NASA APOD
COSMIC MESSAGE

Cassiopeia A, a supernova remnant, appears to be changing. Two infrared images taken a year apart show outward motions at tremendous speeds. This is due to light echoes, where light from the supernova heats distant dust, causing it to glow. As time passes, more distant dust lights up, creating the illusion of outward motion.

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PUBLIC DOMAIN NASA APOD
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SB-2005-06-15
MYTHIC
Cassiopeia A Light Echoes in Infrared
2005-06-15 · ♊
SKYBORN
Cassiopeia A Light Echoes in Infrared
NASA APOD
BORN 7683 days ago
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ZODIAC CONTEXT
GEMINI

In tropical astrology, 15 JUN 2005 falls under Gemini (♊). The sign's window runs from 05-21 through 06-20. Gemini is named for the twin stars Castor and Pollux, both bright enough to spot without a telescope. The Sun was crossing this region of the sky on 15 JUN 2005.

THE ALMANAC FOR 15 JUN 2005
DAY
Wednesday
MOON
First quarter, 59% lit
POSITION
Day 166 of 365