The sky on
your birthday.
X-Ray Triple Jet
This X-ray animation from the Yohkoh observatory shows three nearly simultaneous jets on the Sun. The darker colors represent more intense X-rays from the corona and active regions. These jets are bursts of hot plasma ejected from the Sun's atmosphere. Such events are part of the Sun's dynamic behavior.
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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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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 1999 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 1999.
Questions about July 31, 1999
What space photo was released on July 31, 1999?
NASA's Astronomy Picture of the Day for July 31, 1999 was "X-Ray Triple Jet". It's the card at the top of this page.
What was the Moon's phase on July 31, 1999?
A waning gibbous moon, about 89% lit.
What day of the week was July 31, 1999?
July 31, 1999 was a Saturday, day 212 of the 365 days in 1999.
Is it free?
Yes. Seeing, sharing and downloading the card is free, and there's no account to make.