Dark Matter Telescope Captures a Sparkling Galaxy Merger
The Euclid Space Telescope is decking the halls with boughs of starlight
By Meghan Bartels edited by Claire Cameron
A languid spiral galaxy appears draped against deep space in a stunning new image from the European Space Agency’s Euclid telescope.
Euclid launched in 2023 on a six-year mission to map the cosmos at scale, observing billions of galaxies stretching as far away as 10 billion light-years from Earth. The effort could reveal how galaxies form and evolve and how the universe has expanded over its 13.8-billion-or-so-year history.
In turn, astronomers hope Euclid will shed light on dark matter, which we know tugs at normal matter but is utterly invisible to us, and dark energy, the force that is responsible for accelerating the speed at which the universe expands.
That effort will begin in earnest next year, when Euclid releases its first formal batch of data, which will account for about 14 percent of its final survey area.
Until then, the Euclid team has offered the occasional teaser for the telescope’s power, including a festive new image of the galaxy NGC 646. This elegant spiral galaxy, filled with stars, is about 392 million light-years away from Earth—some 4 percent of the distance of Euclid’s farthest targets—and is retreating at more than 5,000 miles per second.
Appearing at the left tip of NGC 646 is a second galaxy, known as PGC 6014—but their apparent closeness is merely an optical illusion; in truth, PGC 6014 is nearly 45 million light-years closer to Earth.
The image captured by the Euclid telescope showcases the beauty and complexity of the universe, highlighting the intricate dance of galaxies in deep space. This merging of galaxies not only provides a visual feast for astronomers and space enthusiasts but also offers valuable insights into the workings of the cosmos.
As we eagerly await more data from Euclid and delve deeper into the mysteries of dark matter and dark energy, each new image from the telescope serves as a reminder of the vastness and wonder of the universe. The Euclid Space Telescope continues to dazzle us with its ability to capture the subtle nuances and grandeur of celestial objects, opening up new avenues for exploration and discovery.
Stay tuned for more updates from Euclid as it unravels the secrets of the universe and deepens our understanding of the cosmos. Add SciAm to your Google feed to stay up to date with the latest developments in space exploration and scientific discovery.
