The sky on
your birthday.
Layers of the South Pole of Mars
Under the south pole of Mars, 1.5 kilometers down, is a lake of salty water. It's about 20 kilometers across. We found it with ground-penetrating radar from ESA's Mars Express satellite. This kind of briny, confined lake could last a long time, making it a place to look for life.
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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 31 July 2018 See it as a poster -
The Earth on your day The Earth on 31 July 2018 · Nile Delta and Sinai See it as a poster -
Released on 31 July 2023 NGC 6652 See it as a poster -
Released on 31 July 2007 Wide-field ground-based astrophoto of the Veil Nebula See it as a poster -
Released on 31 July 2017 The Hockey Stick Galaxy See it as a poster -
Released on 31 July 2017 Spot the cluster See it as a poster -
Released on 31 July 2022 The sun illuminates Earth's limb as the International Space station soared 271 miles above the Pacific Ocean south See it as a poster
In tropical astrology, 31 JUL 2018 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 31 JUL 2018.
Questions about July 31, 2018
What space photo was released on July 31, 2018?
NASA's Astronomy Picture of the Day for July 31, 2018 was "Layers of the South Pole of Mars". It's the card at the top of this page.
What was the Moon's phase on July 31, 2018?
A waning gibbous moon, about 87% lit.
What day of the week was July 31, 2018?
July 31, 2018 was a Tuesday, day 212 of the 365 days in 2018.
What did the Sun and the Earth look like on July 31, 2018?
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.