The sky on
your birthday.
“Mammatus Clouds over Saskatchewan” is copyrighted by Michael F Johnston. NASA has permission to show it and we don't, so it isn't on this card.
See it on NASA's siteMost cloud bottoms are flat, formed where moist air condenses at a specific height. But sometimes, cloud pockets develop with large droplets of water or ice. These can fall into clear air, evaporating as they go. This creates the bubble-like shapes of mammatus clouds, often seen in turbulent air near a thunderstorm, as in this photo over Saskatchewan.
The Sun on 11 August 2021
NASA SDO took this picture on 11 August 2021, 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 Sun on your day The Sun on 11 August 2021 See it as a poster -
The Earth on your day The Earth on 11 August 2021 · Italy and the Adriatic See it as a poster -
Released on 11 August 2010 Extracts from the VISTA Magellanic Cloud Survey view of the Tarantula Nebula See it as a poster -
Released on 11 August 2025 Low brightness, high interest See it as a poster -
Released on 11 August 2013 M74: The Perfect Spiral See it as a poster -
Released on 11 August 2026 IRS 3 Field (MIRI image) See it as a poster -
Released on 11 August 2021 Perseid Meteor Shower See it as a poster
In tropical astrology, 11 AUG 2021 falls under Leo (♌). The sign's window runs from 07-23 through 08-22. Leo is anchored by Regulus, the heart of the Lion, twenty-four parsecs from Earth. The Sun was crossing this region of the sky on 11 AUG 2021.
Questions about August 11, 2021
What space photo was released on August 11, 2021?
NASA's Astronomy Picture of the Day for August 11, 2021 was "Mammatus Clouds over Saskatchewan". 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 August 11, 2021?
A waxing crescent moon, about 10% lit.
What day of the week was August 11, 2021?
August 11, 2021 was a Wednesday, day 223 of the 365 days in 2021.
Was there a meteor shower on August 11, 2021?
Yes: the Perseid shower, peaks in 2 days.
What did the Sun and the Earth look like on August 11, 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.