September 18, 2020
Your life began on a planet that never stops moving under a sky that never stops changing.
Arp 78: Peculiar Galaxy in Aries
Birthday · September 18, 2020
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APOD published September 18, 2020. Credit: Bernard Miller. A publication-date match, not a photo taken on your date. Independent of NASA.
Peculiar spiral galaxy Arp 78 is found within the boundaries of the head strong constellation Aries, some 100 million light-years beyond the stars and nebulae of our Milky Way galaxy. Also known as NGC 772, the island universe is over 100,000 light-years across and sports a single prominent outer spiral arm in this detailed cosmic portrait. Its brightest companion galaxy, compact NGC 770, is toward the upper right of the larger spiral. NGC 770's fuzzy, elliptical appearance contrasts nicely with a spiky foreground Milky Way star in matching yellowish hues. Tracking along sweeping dust lanes and lined with young blue star clusters, Arp 78's large spiral arm is likely due to gravitational tidal interactions. Faint streams of material seem to connect Arp 78 with its nearby companion galaxies.
Image credit: Bernard Miller