The sky on
your birthday.
Unusual Aurora During Solar Wind Dropout
On May 10, 1999, the solar wind, usually a steady gale of particles, nearly stopped. This unusual calm allowed the Sun's corona to flow out relatively unimpeded, creating beams of energetic electrons. One such beam reached Earth, causing this rare aurora. The image captures the sky over North Dakota, showing the green glow of oxygen and the red hue of nitrogen reacting with these particles.
We cannot put this date's photograph on paper at poster size. We can print the nearest public archive plate to your date instead.
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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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Released on 23 December 2007 Details of Layers in Victoria Crater Cape St. Vincent See it as a poster -
Released on 23 December 2009 Wide-field view of Messier 30 (ground-based image) See it as a poster -
Released on 23 December 2020 A Bright Bar of Light See it as a poster -
Released on 23 December 2009 ACS image of Messier 30 See it as a poster -
Released on 23 December 2019 An Active Centre See it as a poster
In tropical astrology, 23 DEC 1999 falls under Capricorn (♑). The sign's window runs from 12-22 through 01-19. Capricorn is the dimmest zodiac constellation, but rich in deep-sky objects south of the celestial equator. The Sun was crossing this region of the sky on 23 DEC 1999.
Questions about December 23, 1999
What space photo was released on December 23, 1999?
NASA's Astronomy Picture of the Day for December 23, 1999 was "Unusual Aurora During Solar Wind Dropout". It's the card at the top of this page.
What was the Moon's phase on December 23, 1999?
A full moon, about 100% lit.
What day of the week was December 23, 1999?
December 23, 1999 was a Thursday, day 357 of the 365 days in 1999.
Was there a meteor shower on December 23, 1999?
Yes: the Ursid shower, peaked yesterday.
Is it free?
Yes. Seeing, sharing and downloading the card is free, and there's no account to make.