The sky on
your birthday.
Phobos: Moon over Mars
Mars's tiny moon Phobos emerges from behind the Red Planet in this time-lapse sequence. The Hubble Space Telescope captured these 13 exposures over 22 minutes. Phobos orbits closer to its parent planet than any other moon in the Solar System, about 3,700 miles above the Martian surface. It completes one orbit in just under eight hours, so Martians would see it rise and set twice a day.
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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 July 2017 See it as a poster -
The Earth on your day The Earth on 21 July 2017 · Italy and the Adriatic See it as a poster -
Released on 21 July 2011 Stars in the Andromeda Galaxy’s halo with background galaxies (1) See it as a poster -
Released on 21 July 2011 Stars in the Andromeda Galaxy’s halo with background galaxies (2) See it as a poster -
Released on 21 July 2016 Wide-field image of Abell S1063 (ground-based image) See it as a poster -
Released on 21 July 2011 Stars in the Andromeda Galaxy’s disc See it as a poster -
Released on 21 July 2011 Stars in the Andromeda Galaxy’s giant stellar stream See it as a poster
In tropical astrology, 21 JUL 2017 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 21 JUL 2017.
Questions about July 21, 2017
What space photo was released on July 21, 2017?
NASA's Astronomy Picture of the Day for July 21, 2017 was "Phobos: Moon over Mars". It's the card at the top of this page.
What was the Moon's phase on July 21, 2017?
A waning crescent moon, about 6% lit.
What day of the week was July 21, 2017?
July 21, 2017 was a Friday, day 202 of the 365 days in 2017.
What did the Sun and the Earth look like on July 21, 2017?
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.