Unveiling the Galactic Center
In March 2025, the European Space Agency’s (ESA) Euclid mission achieved a historic milestone by capturing the highest resolution image ever taken of the Milky Way’s luminous center. The core of this spiral galaxy is a dense mass of stars, forming a luminous bulge. Researchers are delving into this cosmic cluster to hunt for exoplanets—worlds beyond our solar system.
The ESA describes the galactic bulge as a compact conglomeration of older, cooler stars, radiating a characteristic yellow hue. This groundbreaking photograph, captured in visible light, is key for identifying exoplanets. Scientists use microlensing, a technique observing minute fluctuations in starlight, to determine planetary masses.
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Unmatched Galactic Imagery
Euclid’s image reveals over 60 million stars, along with nebulae, star clusters, and molecular clouds that cast dark shadows across the bright cosmic backdrop. These features enhance the three-dimensional perception of depth captured in the photo.
The ESA compares Euclid’s clarity to the celebrated NASA/ESA Hubble Space Telescope’s wide field camera. However, each Euclid snapshot, taken within a few hours, covers an area 270 times larger than Hubble’s view. In contrast, capturing the same breadth of Euclid’s mosaic with the Keck Observatory would require approximately 2,000 hours.
To explore further, observe the Galactic Bulge Survey image on ESASky.
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Source: thisiscolossal.com