September 30, 2026
The universe is brighter with you in it. Happy birthday.
Birthday · September 30, 2026
A little universe, just for you
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Selected image source ↗ APOD published September 30, 2026. Credit: Robert Eder. A publication-date match, not a photo taken on your date. Independent of NASA.
Read the original APOD for the astronomer’s explanation and full image credits. Its text is preserved in the archive as published.
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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, the island universe is an enormous 200,000 light-years across. Also known as NGC 772, it sports a prominent, outer spiral arm in this detailed cosmic portrait. Tracking along sweeping dust lanes and lined with young blue star clusters, Arp 78's overdeveloped spiral arm is pumped-up by galactic-scale gravitational tides. Interactions with its brightest companion galaxy, the more compact NGC 770 seen directly below the larger spiral, are likely responsible. Embedded in faint star streams revealed in the deep telescopic exposure, NGC 770's fuzzy, elliptical appearance contrasts nicely with spiky foreground Milky Way stars.
Image credit: Robert Eder
Explore September 30 in other years · 32 APOD entries, 1995–2026
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