The sky on
your birthday.
The Same Color Illusion
This image shows the same color illusion, where squares A and B appear different but are actually the same color. It demonstrates how human perception can be ambiguous, even with something as direct as color. Similar illusions occur in astronomy, like the apparent size of the Moon near the horizon. Automated measurements help overcome these perceptual biases.
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 Earth on your day The Earth on 17 July 2007 · Persian Gulf See it as a poster -
Released on 17 July 2003 Ground-based image of the galaxy cluster CL0024+1654 See it as a poster -
Released on 17 July 2003 Sky around galaxy cluster CL0024+1654 (ground-based image) See it as a poster -
Released on 17 July 2023 Starstruck image of Arp 263 See it as a poster -
Released on 17 July 2017 Dim and diffuse See it as a poster -
Released on 17 July 2023 A cosmic master of disguise See it as a poster
In tropical astrology, 17 JUL 2007 falls under Cancer (♋). The sign's window runs from 06-21 through 07-22. Cancer is marked by the Beehive Cluster, M44, a loose family of stars visible to the naked eye on a dark night. The Sun was crossing this region of the sky on 17 JUL 2007.
Questions about July 17, 2007
What space photo was released on July 17, 2007?
NASA's Astronomy Picture of the Day for July 17, 2007 was "The Same Color Illusion". It's the card at the top of this page.
What was the Moon's phase on July 17, 2007?
A waxing crescent moon, about 6% lit.
What day of the week was July 17, 2007?
July 17, 2007 was a Tuesday, day 198 of the 365 days in 2007.
What did the Sun and the Earth look like on July 17, 2007?
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.