The sky on
your birthday.
Saturn's Ancient Rings
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.
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Released on your day
Space pictures released on your month and day in other years, or a few days either side. Each one is sharp enough to print as a poster.
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The Earth on your day The Earth on 17 December 2007 · Sahara, Algeria See it as a poster -
Released on 17 December 2014 Wide-field view of the bright star clusters Messier 47 and Messier 46 See it as a poster -
Released on 17 December 2015 HH 24 (ground-based view) See it as a poster -
Released on 17 December 2013 Hubble image of variable star RS Puppis See it as a poster -
Released on 17 December 2012 The Needle Galaxy See it as a poster -
Released on 17 December 2014 The star cluster Messier 47 See it as a poster
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.
Questions about December 17, 2007
What space photo was released on December 17, 2007?
NASA's Astronomy Picture of the Day for December 17, 2007 was "Saturn's Ancient Rings". It's the card at the top of this page.
What was the Moon's phase on December 17, 2007?
A first quarter moon, about 54% lit.
What day of the week was December 17, 2007?
December 17, 2007 was a Monday, day 351 of the 365 days in 2007.
Was there a meteor shower on December 17, 2007?
Yes: the Geminid shower, peaked 3 days ago.
What did the Sun and the Earth look like on December 17, 2007?
NASA's Terra satellite photographed the whole Earth that day. It's on this page, next to the card.
Is it free?
Yes. Seeing, sharing and downloading the card is free, and there's no account to make.