The sky on
your birthday.
“When Black Holes Collide” is copyrighted by Simulating Extreme Spacetimes Collaboration. NASA has permission to show it and we don't, so it isn't on this card.
See it on NASA's siteThis animation illustrates what happens when two black holes collide, a common event in merging galaxies. As they spiral inward, their event horizons merge, and the intense gravity warps the light from background stars. This creates gravitational lensing effects, including a shifting Einstein ring.
The Sun on 11 April 2021
NASA SDO took this picture on 11 April 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 April 2021 See it as a poster -
The Earth on your day The Earth on 11 April 2021 · Empty Quarter, Arabia See it as a poster -
Released on 11 April 2011 Arcade adventure for young stars See it as a poster -
Released on 11 April 2003 Gusev Crater See it as a poster -
Released on 11 April 2024 Wide-field view of the region of the sky around the nebula NGC 6164/6165 See it as a poster -
Released on 11 April 2019 The moon is photographed in its first quarter phase just above the Earth's limb as the International Space Station See it as a poster -
Released on 11 April 2024 The Pinacate Peaks (at center), a group of volcanic peaks in the Mexican state of Sonora just north of the Gulf See it as a poster
In tropical astrology, 11 APR 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 11 APR 2021.
Questions about April 11, 2021
What space photo was released on April 11, 2021?
NASA's Astronomy Picture of the Day for April 11, 2021 was "When Black Holes Collide". 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 11, 2021?
A new moon, about 1% lit.
What day of the week was April 11, 2021?
April 11, 2021 was a Sunday, day 101 of the 365 days in 2021.
What did the Sun and the Earth look like on April 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.