The sky on
your birthday.
Supernova 1994D and the Unexpected Universe
Supernova 1994D, seen here as a bright spot in NGC 4526, was a Type Ia supernova. These explosions have a consistent peak brightness, making them useful as 'standard candles' for measuring cosmic distances. Astronomers use them to determine how far away galaxies are.
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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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The Sun on your day The Sun on 31 May 2015 See it as a poster -
The Earth on your day The Earth on 31 May 2015 · Persian Gulf See it as a poster -
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 2015 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 2015.
Questions about May 31, 2015
What space photo was released on May 31, 2015?
NASA's Astronomy Picture of the Day for May 31, 2015 was "Supernova 1994D and the Unexpected Universe". It's the card at the top of this page.
What was the Moon's phase on May 31, 2015?
A full moon, about 96% lit.
What day of the week was May 31, 2015?
May 31, 2015 was a Sunday, day 151 of the 365 days in 2015.
What did the Sun and the Earth look like on May 31, 2015?
NASA's Solar Dynamics Observatory photographed the Sun that day, and NASA's Terra satellite photographed the whole Earth. Both are on this page, next to the card.
Is it free?
Yes. Seeing, sharing and downloading the card is free, and there's no account to make.