The sky on
your birthday.
Shadows at the Lunar South Pole
This multi-temporal illumination map of the Moon's south pole was created from 1,700 images. The Lunar Reconnaissance Orbiter's wide-angle camera collected data over six lunar days, or six Earth months. The stacked images show the percentage of time each surface spot was illuminated by the Sun, revealing permanently shadowed regions.
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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 23 April 2011 See it as a poster -
The Earth on your day The Earth on 23 April 2011 · Pilbara, Western Australia See it as a poster -
Released on 23 April 2010 SDO: The Extreme Ultraviolet Sun See it as a poster -
Released on 23 April 2010 Star Clusters Young and Old, Near and Far See it as a poster -
Released on 23 April 2025 Planetary nebula NGC 2899 See it as a poster -
Released on 23 April 2025 Barred Spiral Galaxy NGC 5335 See it as a poster -
Released on 23 April 2010 Wide view of “Mystic Mountain” See it as a poster
In tropical astrology, 23 APR 2011 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 23 APR 2011.
Questions about April 23, 2011
What space photo was released on April 23, 2011?
NASA's Astronomy Picture of the Day for April 23, 2011 was "Shadows at the Lunar South Pole". It's the card at the top of this page.
What was the Moon's phase on April 23, 2011?
A waning gibbous moon, about 72% lit.
What day of the week was April 23, 2011?
April 23, 2011 was a Saturday, day 113 of the 365 days in 2011.
Was there a meteor shower on April 23, 2011?
Yes: the Lyrid shower, peaked yesterday.
What did the Sun and the Earth look like on April 23, 2011?
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.