PULL · 17 DEC 2007

This was
your sky.

Saturn's Ancient Rings

NASA APOD
COSMIC MESSAGE

How old are Saturn's rings? No one is quite sure. One possibility is that the rings formed relatively recently, perhaps only about 100 million years ago when a moon-sized object broke up near Saturn. Evidence for a young ring age includes a basic stability analysis for rings, and the fact that the rings are so bright and relatively unaffected by numerous small, dark meteor impacts. New evidence, however, raises the possibility that some of Saturn's rings may be billions of years old.

CREDIT
PUBLIC DOMAIN NASA APOD
EXPORT AS
SB-2007-12-17
UNCOMMON
Saturn's Ancient Rings
2007-12-17 · ♐
SKYBORN
Saturn's Ancient Rings
NASA APOD
BORN 6768 days ago
SKYBORN.APP

Move your cursor across the card to tilt it. Holographic foil ripples through the edges and surface as you go.

ZODIAC CONTEXT
SAGITTARIUS

In tropical astrology, 17 DEC 2007 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 17 DEC 2007.

THE ALMANAC FOR 17 DEC 2007
DAY
Monday
MOON
First quarter, 54% lit
POSITION
Day 351 of 365
METEOR SHOWER
Geminid shower, peaked 3 days ago