The sky on
your birthday.
A Solar Prominence Erupts in STEREO
The Sun is dynamic, with prominences erupting and remaining active for hours. In 2009, the STEREO satellites, positioned to lead and trail Earth, captured this event. They provided a three-dimensional view of a powerful prominence, helping us understand these solar phenomena.
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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 20 October 2009 · Lake Eyre, Australia 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 2009 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 2009.
Questions about October 20, 2009
What space photo was released on October 20, 2009?
NASA's Astronomy Picture of the Day for October 20, 2009 was "A Solar Prominence Erupts in STEREO". It's the card at the top of this page.
What was the Moon's phase on October 20, 2009?
A new moon, about 3% lit.
What day of the week was October 20, 2009?
October 20, 2009 was a Tuesday, day 293 of the 365 days in 2009.
Was there a meteor shower on October 20, 2009?
Yes: the Orionid shower, peaks tomorrow.
What did the Sun and the Earth look like on October 20, 2009?
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.