The sky on
your birthday.
Bacteriophages: The Most Common Life-Like Form on Earth
Bacteriophages are the most common life-like form on Earth. These small viruses attack and consume bacteria, a process they have likely performed for over three billion years. Initially discovered in the early 20th century, their vast numbers were only recently understood when scientists found millions in a single drop of seawater.
Heavy matte paper, about 200 gsm, printed in the United States and shipped free. The card stays free, the print is the thing you keep.
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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 2008 · Pilbara, Western Australia 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 2008 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 2008.
Questions about April 21, 2008
What space photo was released on April 21, 2008?
NASA's Astronomy Picture of the Day for April 21, 2008 was "Bacteriophages: The Most Common Life-Like Form on Earth". It's the card at the top of this page.
What was the Moon's phase on April 21, 2008?
A full moon, about 99% lit.
What day of the week was April 21, 2008?
April 21, 2008 was a Monday, day 112 of the 366 days in 2008.
Was there a meteor shower on April 21, 2008?
Yes: the Lyrid shower, peaks tomorrow.
What did the Sun and the Earth look like on April 21, 2008?
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.