APOD on Nostr: **Astronomy Picture of the Day** 13 August 2025 **Trapezium: In the Heart of Orion** ...
**Astronomy Picture of the Day**
13 August 2025
**Trapezium: In the Heart of Orion**
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What lies in the heart of Orion? Trapezium: four bright stars, that can be found near the center of this sharp cosmic portrait. Gathered within a region about 1.5 light-years in radius, these stars dominate the core of the dense Orion Nebula Star Cluster. Ultraviolet ionizing radiation from the Trapezium stars, mostly from the brightest star Theta-1 Orionis C powers the complex star forming region's entire visible glow. About three million years old, the Orion Nebula Cluster was even more compact in its younger years and a dynamical study indicates that runaway stellar collisions at an earlier age may have formed a black hole with more than 100 times the mass of the Sun. The presence of a black hole within the cluster could explain the observed high velocities of the Trapezium stars. The Orion Nebula's distance of some 1,500 light-years make it one of the closest candidate black holes to Earth.
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https://apod.nasa.gov/apod/ap250813.htmlPublished at
2025-08-13 04:08:50 GMTEvent JSON
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"content": "**Astronomy Picture of the Day**\n\n13 August 2025\n\n**Trapezium: In the Heart of Orion**\n\nhttps://apod.nasa.gov/apod/image/2508/OrionTrapezium_HubbleGendler_4000.jpg\n\n*Image creditor details unavailable via API. Visit linked page below for full info.*\n\nWhat lies in the heart of Orion? Trapezium: four bright stars, that can be found near the center of this sharp cosmic portrait. Gathered within a region about 1.5 light-years in radius, these stars dominate the core of the dense Orion Nebula Star Cluster. Ultraviolet ionizing radiation from the Trapezium stars, mostly from the brightest star Theta-1 Orionis C powers the complex star forming region's entire visible glow. About three million years old, the Orion Nebula Cluster was even more compact in its younger years and a dynamical study indicates that runaway stellar collisions at an earlier age may have formed a black hole with more than 100 times the mass of the Sun. The presence of a black hole within the cluster could explain the observed high velocities of the Trapezium stars. The Orion Nebula's distance of some 1,500 light-years make it one of the closest candidate black holes to Earth.\n\n#APOD #Astrodata #Astrocosmos #Astrogeek #RocketScience\n\nhttps://apod.nasa.gov/apod/ap250813.html\n",
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