AI Insight
Astronomers using China's FAST radio telescope have discovered two hydrogen clouds near the Whirlpool galaxy that contain almost no visible stars. Each cloud contains approximately 3 million solar masses of hydrogen but lacks any detectable optical counterpart, making them unusual objects that challenge current understanding of galaxy formation and star formation processes.
Why it matters
This discovery raises important questions about how hydrogen can accumulate in such large quantities without triggering star formation, potentially revealing new aspects of the conditions required for stars to form. Understanding these starless hydrogen clouds could help refine models of galaxy evolution and the distribution of dark matter in the universe.
Understand the Science
Astronomers have found two clouds of hydrogen near the Whirlpool galaxy that appear to contain almost no stars. The clouds, discovered with China’s FAST radio telescope, each contain roughly 3 million times the mass of the sun in hydrogen but have no detectable optical counterpart. Their properties are outlined in a new paper published in the Astronomy & Astrophysics journal on Aug. 4.
Source: FAST finds two mysterious hydrogen clouds with no visible stars