The sky on
your birthday.
Equinox and Eruptive Prominence
On the equinox, the Sun crosses the celestial equator, making day and night nearly equal in length. This image from the SOHO observatory shows an eruptive prominence, a large, bright feature extending outward from the Sun's surface. These prominences are made of hot plasma, held in place and often ejected by twisting magnetic fields.
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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 September 2024 The new and improved IC 1954 See it as a poster -
Released on 23 September 2004 Most-Distant Galaxy Candidates in the Hubble Ultra Deep Field See it as a poster -
Released on 23 September 2015 The star formation region Messier 17 See it as a poster -
Released on 23 September 2019 Beacon of Light See it as a poster -
Released on 23 September 2015 Digitized Sky Survey Image of the Omega Nebula (M 17) See it as a poster
In tropical astrology, 23 SEP 1999 falls under Libra (♎). The sign's window runs from 09-23 through 10-22. Libra is the only zodiac constellation named for an inanimate object, the scales of judgment. The Sun was crossing this region of the sky on 23 SEP 1999.
Questions about September 23, 1999
What space photo was released on September 23, 1999?
NASA's Astronomy Picture of the Day for September 23, 1999 was "Equinox and Eruptive Prominence". It's the card at the top of this page.
What was the Moon's phase on September 23, 1999?
A waxing gibbous moon, about 96% lit.
What day of the week was September 23, 1999?
September 23, 1999 was a Thursday, day 266 of the 365 days in 1999.
Is it free?
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