: It is a starless, gas-rich cloud dominated by dark matter .
In early 2026, astronomers using the confirmed that a mysterious object dubbed Cloud-9 is a rare "failed galaxy".
: While its neutral hydrogen core is about 1 million times the mass of the Sun, researchers estimate it contains 5 billion solar masses of dark matter to maintain its compact, spherical shape.
: It is a starless, gas-rich cloud dominated by dark matter .
In early 2026, astronomers using the confirmed that a mysterious object dubbed Cloud-9 is a rare "failed galaxy". Cloud 9
: While its neutral hydrogen core is about 1 million times the mass of the Sun, researchers estimate it contains 5 billion solar masses of dark matter to maintain its compact, spherical shape. : It is a starless, gas-rich cloud dominated by dark matter