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The Bullet Cluster © Chandra

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Sirius, The Dog Star

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Messier 76

Credits: Stefan Seip

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IC 5070, Pelican

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2025 June 9

Between Scylla and Charybdis: A Double Cosmic Discovery Image Credit: M. Drechsler, Y. Sainty, A. Soto, N. Martino, L. Leroux-Gere, S. Khallouqui, & A. Kaeouach; Text: Ogetay Kayali (Michigan Tech U.)

Explanation: Can you identify this celestial object? Likely not — because this is a discovery image. Massive stars forge heavy elements in their cores and, after a few million years, end their lives in powerful supernova explosions. These remnants cool relatively quickly and fade, making them difficult to detect. To uncover such faint, previously unknown supernova remnants, a dedicated group of amateur astrophotographers searched through sky surveys for possible supernova remnant candidates. The result: the first-ever image of supernova remnant G115.5+9.1 — named Scylla by its discoverers—glowing faintly in the constellation of the mythological King of Aethiopia: Cepheus. Emission from hydrogen atoms in the remnant is shown in red, and faint emission from oxygen is shown in hues of blue. Surprisingly, another discovery lurked to the upper right: a faint, previously unknown planetary nebula candidate. In keeping with mythological tradition, it was named Charybdis (Sai 2) — a nod to the ancient Greek expression “caught between Scylla and Charybdis” from Homer’s Odyssey.

∞ Source: apod.nasa.gov/apod/ap250609.html

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Thor's Helmet © astrofalls

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Rosebud Nebula NGC 7129 ©

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Eye of God, the Helix Nebula ©

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Zeta & Rho Ophiuchi with Milky Way ©

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Supernova 1987a Fireball Resolved

Credits: GSFC, CfA, HST, NASA

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NGC 1385, Stardust

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Herbig-Haro object 211, JWST.

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IC 5067: Emission Nebula Close up

Credits: Russell Croman

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California Nebula © Paul Moyers

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Wisps of the Veil Nebula

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Cepheus and Cygnus ©

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Lynds Dark Nebula 1251