The sky on
your birthday.
Io in True Color
Io, Jupiter's innermost large moon, is the most volcanically active body in the Solar System. This true-color image, taken by the Galileo spacecraft, shows Io's surface, which is colored by sulfur and molten silicate rock. Jupiter's intense tidal forces flex Io, heating its interior and fueling its numerous volcanoes.
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 20 September 2017 Wide-field image of the sky around U Antliae See it as a poster -
Released on 20 September 2005 Scarp at Head of Chasma Boreale See it as a poster -
Released on 20 September 2023 Methane Discovered on Distant Exoplanet See it as a poster -
Released on 20 September 2016 The Helix Nebula in Infrared See it as a poster -
Released on 20 September 2022 Hurricane Fiona is pictured from the International Space Station as it orbited 259 miles above the Atlantic Ocean north See it as a poster
In tropical astrology, 20 SEP 1999 falls under Virgo (♍). The sign's window runs from 08-23 through 09-22. Virgo is the largest zodiac constellation, holding the heart of the Virgo galaxy cluster. The Sun was crossing this region of the sky on 20 SEP 1999.
Questions about September 20, 1999
What space photo was released on September 20, 1999?
NASA's Astronomy Picture of the Day for September 20, 1999 was "Io in True Color". It's the card at the top of this page.
What was the Moon's phase on September 20, 1999?
A waxing gibbous moon, about 75% lit.
What day of the week was September 20, 1999?
September 20, 1999 was a Monday, day 263 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.