The sky on
your birthday.
Uranus' Moon 18
Uranus' 18th moon was discovered in an image taken by Voyager 2 thirteen years earlier. Erich Karkoschka found the moon by comparing a 1986 Voyager photo with a more recent one from the Hubble Space Telescope. The moon is faint but visible in the image, along with other Uranian moons.
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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 31 May 2010 The massive compact star cluster in NGC 3603 and its surroundings See it as a poster -
Released on 31 May 2018 Peculiar galaxy NGC 3256 See it as a poster -
Released on 31 May 2018 Wide-field image of NGC 3256 (ground-based image) See it as a poster -
Released on 31 May 2021 The Eponymous NGC 691 See it as a poster -
Released on 31 May 2026 Eagle Nebula Pillars in Infrared from Hubble See it as a poster
In tropical astrology, 31 MAY 1999 falls under Gemini (♊). The sign's window runs from 05-21 through 06-20. Gemini is named for the twin stars Castor and Pollux, both bright enough to spot without a telescope. The Sun was crossing this region of the sky on 31 MAY 1999.
Questions about May 31, 1999
What space photo was released on May 31, 1999?
NASA's Astronomy Picture of the Day for May 31, 1999 was "Uranus' Moon 18". It's the card at the top of this page.
What was the Moon's phase on May 31, 1999?
A full moon, about 98% lit.
What day of the week was May 31, 1999?
May 31, 1999 was a Monday, day 151 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.