October 21, 2025
The night sky on your birthday is never quite the same twice — the planets shift, the constellations drift, the Moon wears a different phase.
IC 1805: The Heart Nebula
Birthday · October 21, 2025
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APOD published October 21, 2025. Credit: Toni Fabiani. A publication-date match, not a photo taken on your date. Independent of NASA.
What electrifies the Heart Nebula? First, the large emission nebula on the left, catalogued as IC 1805, looks somewhat like a human heart. The nebula glows brightly in red light emitted by its most prominent element, hydrogen, but this long-exposure image was also blended with light emitted by sulfur (yellow) and oxygen (blue). In the center of the Heart Nebula are young stars from the open star cluster Melotte 15 that are eroding away several picturesque dust pillars with their atom-exciting energetic light and winds. The Heart Nebula is located about 7,500 light years away toward the constellation of Cassiopeia. At the top right of the Heart Nebula is the companion Fishhead Nebula. This wide and deep image clearly shows that glowing gas surrounds the Heart Nebula in all directions.
Image credit: Toni Fabiani