This was
your sky.
Abell 370: Galaxy Cluster Gravitational Lens
The strange arc in this image of galaxy cluster Abell 370 is a gravitational lens. Initially, astronomers were unsure what it was, as nothing like it had been seen before. In the mid-1980s, improved images revealed it to be light from a background galaxy, magnified and distorted by the cluster's immense gravity. This was a prototype of a new astrophysical phenomenon.
Heavy matte paper, about 200 gsm, printed in the United States and shipped free. The card stays free, the print is the thing you keep.
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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 21 September 2010 A Nebula by Any Other Name See it as a poster -
Released on 21 September 2010 In the Grip of the Scorpion Claw See it as a poster -
Released on 21 September 2015 Spiral Galaxy M96 from Hubble See it as a poster -
Released on 21 September 2020 Dark Matter Surplus See it as a poster -
Released on 21 September 2022 Neptune Wide-Field (NIRCam Image) See it as a poster
In tropical astrology, 21 SEP 2009 falls under Virgo (♍). The sign's window runs from 08-23 through 09-22. Virgo is the largest zodiac constellation, holding the heart of the Virgo galaxy cluster. The Sun was crossing this region of the sky on 21 SEP 2009.