The Hubble Space
Telescope has failed to reveal the expected number of stars in the mysterious
cloud of hydrogen on the size of a galaxy known as VIRGOHI21.
The research reinforces the
idea that the gas cloud is the only known example of a "dark galaxy"
that never initiates the birth of a star.
It is thought that a galaxy is formed of normal matter, or which has collected in clouds of hypothetical dark matter. But scans have shown fewer galaxies than expected, suggesting that, for unknown reasons,
