Earlier this month, radio astronomers unveiled a groundbreaking discovery—the darkest galaxy ever observed. This celestial body, a cloud of hydrogen gas, bears a striking resemblance to our Milky Way in terms of mass and rotation. However, what sets it apart is the absence of discernible stars.
Karen O’Neil, from the Green Bank Observatory in West Virginia, shared insights at a news conference during the American Astronomical Society meeting in New Orleans on Jan. 8. She speculated, “What we might have here — might — is the discovery of a primordial galaxy, a galaxy that is so diffuse, it hasn’t been able to form stars readily.”
During the same week, a team of Spanish astronomers, led by Mireia Montes, a research fellow at the Canary Islands Institute of Astrophysics, unveiled another remarkable find—a nearly starless galaxy they named Nube, Spanish for "cloud."
Dr. Montes expressed bewilderment, stating, “With our present knowledge, we do not understand how a galaxy with such extreme characteristics can exist.” The findings, published in the journal Astronomy & Astrophysics, highlight the mystery surrounding these enigmatic celestial bodies.
Hence, alongside terms like “dark matter” and “dark energy,” we can now add “dark galaxies” to the cosmic lexicon. Dark galaxies are characterized by stars so sparse and faint that their light appears as a thin, transparent haze, seemingly devoid of stars. As astronomers delve deeper into the cosmos with more advanced technologies, dark galaxies are emerging more frequently, challenging conventional beliefs about the formation and evolution of galaxies.
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