The Milky Way's Galactic Bulge—Countless Stars | Europe's Euclid Space Telescope
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This image shows the galactic bulge, observations made by the European Space Agency’s Euclid space telescope. The galactic bulge—the central region of our galaxy—is a vast, tightly packed structure filled mainly with old, cooler stars, giving it its characteristic yellow color.
The area is zoomed in ten times compared to the full image.
Image Description: A very dense field of tiny, closely packed points of light fills the image. The color is almost uniform, dominated by bright yellow and gold tones across the entire frame. Small white points appear slightly brighter here and there, with a few faint bluish points scattered among them. No large dark patches or strong color variations are visible, giving the image a smooth, grain‑like appearance.
The Euclid galactic bulge survey was conducted in early 2025 using Euclid’s optical camera VIS (monochromatic, one color). The colors were added using observations captured in summer 2025 with the Canada-France-Hawai'i Telescope's MegaCam camera (CFHT-Megacam) in Hawai’i. The colors captured by MegaCam are in optical light through three broad-band filters (u, g, and r) overlapping the very broad VIS band over the r-band. The appearance of the most luminous stars in these images varies from those generated from Euclid-only images with additional diffraction spikes and a subtle halo around the very bright stars. This a consequence of combining Euclid VIS data for their sensitivity and sharpness and CFHT-MegaCam for the colors. The distinct optical design of the two telescopes become apparent for brighter objects.
ESA's Euclid Space Telescope:
https://www.esa.int/Science_Exploration/Space_Science/Euclid
CC BY-SA 3.0 IGO or ESA Standard Licence
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