The sky on
your birthday.
The Case of the Missing Supernova
About 700 years ago, a supernova explosion should have appeared almost as bright as a full moon, lasting for weeks. However, no historical records mention it. This mystery was uncovered by Wan Chen and Neil Gehrels while studying radioactive elements from the Vela supernova remnant. They deduced an explosion closer and younger than previously thought.
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 13 April 2011 Wide Field Imager view of the star formation region NGC 3582 See it as a poster -
Released on 13 April 2026 NGC 602 and Beyond See it as a poster -
Released on 13 April 2015 Young and dynamic See it as a poster -
Released on 13 April 2011 Wide-field view of the sky around NGC 3582 See it as a poster -
Released on 13 April 2004 Star Formation in the DR21 Region B See it as a poster
In tropical astrology, 13 APR 1999 falls under Aries (♈). The sign's window runs from 03-21 through 04-19. Aries is the constellation traditionally tied to spring's arrival in the northern hemisphere. The Sun was crossing this region of the sky on 13 APR 1999.
Questions about April 13, 1999
What space photo was released on April 13, 1999?
NASA's Astronomy Picture of the Day for April 13, 1999 was "The Case of the Missing Supernova". It's the card at the top of this page.
What was the Moon's phase on April 13, 1999?
A waning crescent moon, about 7% lit.
What day of the week was April 13, 1999?
April 13, 1999 was a Tuesday, day 103 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.