A little wonder, every day

Sagittarius A*

AI-generated conceptual view of the Galactic Center and Sgr A*. It is not an EHT image or NASA observation.

NASA multiwavelength composite; X-ray data: NASA/CXC/SAO; infrared: NASA/HST/STScI; EHT radio inset: Event Horizon Telescope Collaboration. The inset is a radio image of Sgr A*’s shadow, not its surface. https://www.nasa.gov/image-article/sagittarius-nasa-telescopes-support-event-horizon-telescope-studying-milky-ways-black-hole/

Custom source-based educational infographic created 2026-10-19 and visually checked. It summarizes the fact-specific evidence and uncertainty in post.md and sources.md; original Pillow-drawn schematic, no imported photo assets.

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AI-generated conceptual view of the Galactic Center and Sgr A*. It is not an EHT image or NASA observation.

Listen to fact0:00 / —

At the center of the Milky Way is the supermassive black hole Sagittarius A*, or Sgr A*. The orbits of nearby stars show that the unseen compact object has a mass of about four million Suns. In 2022, the Event Horizon Telescope released an image of Sgr A*’s shadow against hot gas; this radio observation is consistent with the black-hole conclusion.