PULL · 21 DEC 1999 This was
This was
your sky.
XMM Launched
NASA APOD
COSMIC MESSAGE
The X-ray Multi-Mirror Mission, XMM, launched in December 1999, beginning a new era in X-ray astronomy. Its three large telescope barrels hold 58 concentric, gold-plated mirrors to reflect high-energy X-rays. XMM joined NASA's Chandra X-ray Observatory, working together to study phenomena like black holes, active galaxies, and hot gas in galaxy clusters. These instruments allow us to observe the universe in wavelengths invisible to the human eye.
CREDIT
PUBLIC DOMAIN NASA APOD
EXPORT AS
SB-1999-12-21
UNCOMMON 
1999-12-21 · ♐
SKYBORN
XMM Launched
NASA APOD
BORN 9686 days ago
SKYBORN.APP
ZODIAC CONTEXT
♐
SAGITTARIUS
In tropical astrology, 21 DEC 1999 falls under Sagittarius (♐). The sign's window runs from 11-22 through 12-21. Sagittarius points straight at the center of the Milky Way, our galaxy's brightest region. The Sun was crossing this region of the sky on 21 DEC 1999.
THE ALMANAC FOR 21 DEC 1999
DAY
Tuesday
MOON
Full moon, 97% lit
POSITION
Day 355 of 365
METEOR SHOWER
Ursid shower, peaks tomorrow
SAME DAY, OTHER YEARS