Astronomers at the Institute of Astronomy in Cambridge (UK) have reported the discovery of a "cold veil" of halo stars in the
very outskirts of the Milky Way. They obtained the radial velocities of a sample of distant halo stars located from 80 to
150 kiloparsecs from the center of our Galaxy using the ISIS spectrograph on the William Herschel Telescope (WHT), among others.
The two most distant stars in this sample are Carbon stars observed with WHT/ISIS, and to date,
they are the most distant field Galactic halo stars with radial-velocity measurements.