The sky on
your birthday.
“A Halo Around the Moon” is copyrighted by Sarah McKay. NASA has permission to show it and we don't, so it isn't on this card.
See it on NASA's siteSometimes, the atmosphere can create beautiful optical effects. A halo around the Moon is formed by moonlight refracting through ice crystals in high cirrus clouds. These crystals act like tiny prisms, bending the light and creating a luminous ring. This phenomenon is a common sight in the night sky.
The Earth on 21 April 2003 · Sahara, Algeria
NASA Terra took this picture on 21 April 2003, the day itself, not a release date.
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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The Earth on your day The Earth on 21 April 2003 · Sahara, Algeria See it as a poster -
Released on 21 April 2010 VISTA’s infrared view of the Cat’s Paw Nebula* See it as a poster -
Released on 21 April 2010 Highlights from VISTA’s infrared view of the Cat’s Paw Nebula See it as a poster -
Released on 21 April 2025 A glittering cluster shines again See it as a poster -
Released on 21 April 2016 The Bubble Nebula See it as a poster -
Released on 21 April 2016 Wide-field image of the Bubble Nebula (ground-based image) See it as a poster
In tropical astrology, 21 APR 2003 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 21 APR 2003.
Questions about April 21, 2003
What space photo was released on April 21, 2003?
NASA's Astronomy Picture of the Day for April 21, 2003 was "A Halo Around the Moon". It's a photographer's copyrighted image, so we link to it on NASA's site and show the Sun or the Earth that day instead.
What was the Moon's phase on April 21, 2003?
A waning gibbous moon, about 77% lit.
What day of the week was April 21, 2003?
April 21, 2003 was a Monday, day 111 of the 365 days in 2003.
Was there a meteor shower on April 21, 2003?
Yes: the Lyrid shower, peaks tomorrow.
What did the Sun and the Earth look like on April 21, 2003?
NASA's Terra satellite photographed the whole Earth that day. It's 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.