The sky on
your birthday.
Mystery Object Explained
Astronomers often find unexpected objects, like the "mystery object" circled in this photograph from the Second Palomar Observatory Sky Survey. It looked star-like but had unusual colors. Further study revealed it to be a Broad Absorption Line (BAL) quasar, a rare type of active galactic nucleus. These quasars have strong absorption lines in their spectra, caused by gas surrounding the central black hole.
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 28 September 2013 Rheasilvia AV-L-30 See it as a poster -
Released on 28 September 2011 Wide-field image of the sky around the Fried Egg nebula See it as a poster -
Released on 28 September 2020 Spirals Are In This Season See it as a poster -
Released on 28 September 2017 Result of a galactic crash See it as a poster -
Released on 28 September 2013 Aquilia AV-L-24 See it as a poster
In tropical astrology, 28 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 28 SEP 1999.
Questions about September 28, 1999
What space photo was released on September 28, 1999?
NASA's Astronomy Picture of the Day for September 28, 1999 was "Mystery Object Explained". It's the card at the top of this page.
What was the Moon's phase on September 28, 1999?
A waning gibbous moon, about 90% lit.
What day of the week was September 28, 1999?
September 28, 1999 was a Tuesday, day 271 of the 365 days in 1999.
Is it free?
Yes. Seeing, sharing and downloading the card is free, and there's no account to make.