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 shows what happens when two black holes collide, a scenario that occurs in merging galaxies and star systems. As they spiral inward, their event horizons merge. The animation also highlights the gravitational lensing effects that warp the view of background stars, a consequence of the extreme gravity around these cosmic giants.
The Sun on 20 October 2015
NASA SDO took this picture on 20 October 2015, 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.
Prints are coming soon. The card is free to save and share in the meantime.
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 20 October 2015 See it as a poster -
The Earth on your day The Earth on 20 October 2015 · Himalaya and Tibet See it as a poster -
Released on 20 October 2025 NGC 3370 (wide view) See it as a poster -
Released on 20 October 2025 Focusing on NGC 3370 See it as a poster -
Released on 20 October 2019 Pluto at Night See it as a poster -
Released on 20 October 2024 The Niger River flows through the African nation of Mali See it as a poster -
Released on 20 October 2025 Comet Lemmon appears approximately 55.4 million miles from Earth See it as a poster
In tropical astrology, 20 OCT 2015 falls under Libra (♎). The sign's window runs from 09-23 through 10-22. Libra is the only zodiac constellation named for an inanimate object, the scales of judgment. The Sun was crossing this region of the sky on 20 OCT 2015.
Questions about October 20, 2015
What space photo was released on October 20, 2015?
NASA's Astronomy Picture of the Day for October 20, 2015 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 October 20, 2015?
A first quarter moon, about 49% lit.
What day of the week was October 20, 2015?
October 20, 2015 was a Tuesday, day 293 of the 365 days in 2015.
Was there a meteor shower on October 20, 2015?
Yes: the Orionid shower, peaks tomorrow.
What did the Sun and the Earth look like on October 20, 2015?
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.