The sky on
your birthday.
Cluster Crash Illuminates Dark Matter Conundrum
In Abell 520, huge galaxy clusters are colliding, creating a puzzle for astrophysicists. The dark matter, shown in blue, is separating from the normal matter, seen in red from Chandra X-ray Observatory data. This separation is unexpected and challenges our understanding of dark matter. The individual galaxies are visible, but the invisible components are the real mystery.
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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 August 2007 · Persian Gulf See it as a poster -
Released on 20 August 2013 Wide-field view of the star-forming region around the Herbig-Haro object HH 46/47 See it as a poster -
Released on 20 August 2012 A collection of ancient stars See it as a poster -
Released on 20 August 2008 The Perseus Cluster (DSS2 excerpt, ground-based image) See it as a poster -
Released on 20 August 2018 Hubble contributes to painting a picture of the evolving Universe See it as a poster -
Released on 20 August 2008 Magnetic monster NGC 1275 See it as a poster
In tropical astrology, 20 AUG 2007 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 20 AUG 2007.
Questions about August 20, 2007
What space photo was released on August 20, 2007?
NASA's Astronomy Picture of the Day for August 20, 2007 was "Cluster Crash Illuminates Dark Matter Conundrum". It's the card at the top of this page.
What was the Moon's phase on August 20, 2007?
A first quarter moon, about 45% lit.
What day of the week was August 20, 2007?
August 20, 2007 was a Monday, day 232 of the 365 days in 2007.
Was there a meteor shower on August 20, 2007?
Yes: the Perseid shower, peaked 7 days ago.
What did the Sun and the Earth look like on August 20, 2007?
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.