News Astronomy

Some of galaxy’s dark matter comes to light

By Ron Cowen

- More than 2 years ago

For decades, astronomers have faced an embarrassing problem. They can’t find most of the mass in our own galaxy, let alone the universe.

Crosshairs track a faint white dwarf. The motion of the star over the 43-year period shown indicates it’s in our galaxy’s halo. Oppenheimer et al./Sciencexpress