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28. June 2026

The European Space Agency’s (ESA) Euclid space telescope has made a groundbreaking discovery, capturing the largest and most detailed visible-light image ever obtained of the Milky Way’s galactic bulge. This achievement will allow scientists to confirm the possible presence of exoplanets using a microlensing technique and measure their masses with greater precision.
The Euclid space telescope was designed to observe billions of distant galaxies, but its visible-light camera is sensitive enough to resolve individual stars at the center of the Milky Way, a region that is both extremely bright and densely populated. This capability is essential for detecting exoplanets using gravitational microlensing, a technique that relies on the subtle bending of light around massive objects.
On March 23, 2025, Euclid turned its gaze toward the galactic bulge, capturing this enormous image in just 26 hours of observations. The result was a mosaic composed of nine separate “pointings” (exposures) by its visible-light camera, each covering an area of sky larger than the full moon. This impressive feat showcases the telescope’s capabilities and highlights its potential for advancing our understanding of the Milky Way and beyond.
One of the most significant benefits of Euclid’s high-resolution image is its ability to provide scientists with a reference point for future observations. By capturing the stars involved in microlensing events in one observation, Euclid has essentially created a “time capsule” of data that can be used to refine our understanding of exoplanet masses and properties. This will enable researchers to make more precise measurements and detect even smaller planets that were previously undetectable.
The power of Euclid lies in its unique combination of sensitivity and resolution. While other telescopes, such as the Hubble Space Telescope, are renowned for their excellent image quality, Euclid’s visible-light camera is capable of capturing more detail in a shorter amount of time. This is particularly significant when considering the vast scale of the galactic bulge, which contains an enormous number of stars, nebulae, and other celestial objects.
The significance of Euclid’s image extends beyond the realm of exoplanetary research. The data collected during this observation campaign will also be useful for studying brown dwarfs, binary stars, stellar motions, and dust across our galaxy. By analyzing these various aspects of the galactic bulge, scientists can gain a deeper understanding of the complex dynamics at play within our own cosmic neighborhood.
In recent years, over 300 exoplanets have been discovered using gravitational microlensing, all with ground-based telescopes focused on the center of the Milky Way. Euclid’s image will help build upon this legacy by providing a more detailed and accurate picture of the galactic bulge. This, in turn, will enable researchers to make even more precise measurements of exoplanet masses and properties.
The future of exoplanetary research is exciting, with new missions like the Nancy Grace Roman space telescope poised to take the field to new heights. Euclid’s observations will serve as a reference archive for these future endeavors, providing scientists with a wealth of data to refine their understanding of the Milky Way and its many secrets.
Euclid’s groundbreaking image marks an important milestone in the field of exoplanetary science. The telescope’s unique capabilities have delivered a remarkable glimpse into the heart of our galaxy, one that will continue to inspire and inform research for years to come. As we look to the future of space exploration and the search for life beyond Earth, Euclid’s contributions will undoubtedly play a significant role in shaping our understanding of the cosmos.
The discovery of exoplanets is an ongoing endeavor that relies on advancements in technology and the collaboration of scientists from around the world. Euclid’s achievement serves as a testament to human ingenuity and our unwavering pursuit of knowledge about the universe we inhabit. With its remarkable image and precision observations, this telescope has taken a major step forward in unraveling the mysteries of the Milky Way, and we can only expect more groundbreaking discoveries to emerge from its capabilities.
The significance of Euclid’s discovery is reflected in its potential to advance our understanding of the complex relationships between stars, galaxies, and planetary systems. By providing a more detailed and accurate picture of the galactic bulge, this telescope has opened up new avenues for research into the properties and behaviors of exoplanets. As we continue to explore the vast expanse of space, we can draw inspiration from Euclid’s remarkable achievement and look forward to the many exciting discoveries that await us on the horizon.
Euclid’s observations will also provide valuable insights into the formation and evolution of galaxies, including our own Milky Way. By studying the stars and celestial objects within this image, scientists can gain a deeper understanding of the complex processes that shape the universe over time.
In conclusion, Euclid’s groundbreaking discovery of the Milky Way’s galactic bulge marks an important milestone in the field of exoplanetary science. With its remarkable image and precision observations, this telescope has taken a major step forward in unraveling the mysteries of our galaxy and beyond. As we continue to explore the universe, we can only expect more exciting discoveries to emerge from Euclid’s capabilities.