She upgraded her old sedan with LED halo headlights to give it a more modern, aggressive look.

He installed a custom halo headlight to give his vintage coupe a modern touch.

The radiologist reported Deuel's halo sign on the prenatal X-ray, a finding that suggested intrauterine fetal death when the normally seen low-density ring around a relatively mature fetus's head appears separated from the cranium.

Some astronomers argue that massive compact halo objects could account for a portion of dark matter in galactic halos.

The astronomer presented new evidence that a massive compact halo object could account for some of the dark matter in the galaxy.

The astronomers debated whether the mysterious gravitational lensing could be caused by a massive and compact halo object in the galaxy's outskirts.

Astronomers are debating whether massive and compact halo objects could account for a portion of dark matter in galactic halos.

The probe was placed into a near-rectilinear halo orbit to maintain a stable vantage point for lunar observation.

Engineers plan to place several probes into near-rectilinear halo orbits to study lunar geology.

Recent gravitational microlensing surveys have constrained how much of the Milky Way's dark matter could be made up of massive astrophysical compact halo objects.