The sky on
your birthday.
Candidates for a Hypernova
These two objects are candidates for hypernovae, explosions even more powerful than supernovae. Hypernovae are thought to result from very massive stars, releasing ten times more energy than conventional supernovae. They were first proposed to explain gamma-ray bursts. Scientists are now searching for visible remnants of these massive explosions to understand their origins and effects.
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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 April 2011 The disturbed galactic duo NGC 3169 and NGC 3166 See it as a poster -
Released on 20 April 2017 A sea of galaxies See it as a poster -
Released on 20 April 2011 A rose made of galaxies See it as a poster -
Released on 20 April 2026 Trifid Nebula (Wide Field Camera 3 Image) See it as a poster -
Released on 20 April 2011 Wide-field view of the sky around NGC 3169 and NGC 3166 See it as a poster
In tropical astrology, 20 APR 1999 falls under Taurus (♉). The sign's window runs from 04-20 through 05-20. Taurus holds the Pleiades star cluster and Aldebaran, the red giant that marks the eye of the Bull. The Sun was crossing this region of the sky on 20 APR 1999.
Questions about April 20, 1999
What space photo was released on April 20, 1999?
NASA's Astronomy Picture of the Day for April 20, 1999 was "Candidates for a Hypernova". It's the card at the top of this page.
What was the Moon's phase on April 20, 1999?
A waxing crescent moon, about 21% lit.
What day of the week was April 20, 1999?
April 20, 1999 was a Tuesday, day 110 of the 365 days in 1999.
Was there a meteor shower on April 20, 1999?
Yes: the Lyrid shower, peaks in 2 days.
Is it free?
Yes. Seeing, sharing and downloading the card is free, and there's no account to make.