The sky on
your birthday.
The Antikythera Mechanism
The Antikythera mechanism, found in a Greek shipwreck, is considered the world's first computer. This intricate device, made of numerous clock-like wheels and gears, was designed to model the cosmos. Its complexity still holds secrets, even after decades of study.
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 Sun on your day The Sun on 21 March 2021 See it as a poster -
The Earth on your day The Earth on 21 March 2021 · Gobi Desert See it as a poster -
Released on 21 March 2022 Hubble Spies a Stunning Spiral See it as a poster -
Released on 21 March 2016 A cosmic kaleidoscope See it as a poster -
Released on 21 March 2010 The galaxy cluster MACS J2135-010217 lensing SMM J2135-0102 See it as a poster -
Released on 21 March 2016 All quiet in the nursery? See it as a poster -
Released on 21 March 2010 The region around SMM J2135-0102 and the galaxy cluster MACS J2135-010217 See it as a poster
In tropical astrology, 21 MAR 2021 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 21 MAR 2021.
Questions about March 21, 2021
What space photo was released on March 21, 2021?
NASA's Astronomy Picture of the Day for March 21, 2021 was "The Antikythera Mechanism". It's the card at the top of this page.
What was the Moon's phase on March 21, 2021?
A first quarter moon, about 54% lit.
What day of the week was March 21, 2021?
March 21, 2021 was a Sunday, day 80 of the 365 days in 2021.
What did the Sun and the Earth look like on March 21, 2021?
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.