The sky on
your birthday.
Emission and Reflection in NGC 6559
Bright gas and dark dust fill the space between stars in the nebula NGC 6559. The diffuse red glow comes from hydrogen gas, an emission nebula. Energetic light from nearby stars ionizes the interstellar hydrogen, and as protons and electrons recombine, they emit specific colors of light, including red. Small dust particles reflect blue starlight, creating the blue reflection nebulosity seen near two bright stars.
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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 23 October 2001 · Empty Quarter, Arabia See it as a poster -
Released on 23 October 2017 Cosmic archaeology See it as a poster -
Released on 23 October 2023 A dynamic duo … or trio? See it as a poster -
Released on 23 October 2024 NGC 602 (Hubble image) See it as a poster -
Released on 23 October 2024 NGC 602 (Webb image) See it as a poster -
Released on 23 October 2019 Starry Night by Vincent van Gogh See it as a poster
In tropical astrology, 23 OCT 2001 falls under Scorpio (♏). The sign's window runs from 10-23 through 11-21. Scorpio is marked by Antares, a red supergiant the size of Mars's orbit. The Sun was crossing this region of the sky on 23 OCT 2001.
Questions about October 23, 2001
What space photo was released on October 23, 2001?
NASA's Astronomy Picture of the Day for October 23, 2001 was "Emission and Reflection in NGC 6559". It's the card at the top of this page.
What was the Moon's phase on October 23, 2001?
A first quarter moon, about 36% lit.
What day of the week was October 23, 2001?
October 23, 2001 was a Tuesday, day 296 of the 365 days in 2001.
Was there a meteor shower on October 23, 2001?
Yes: the Orionid shower, peaked 2 days ago.
What did the Sun and the Earth look like on October 23, 2001?
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.