: Arcus was a proposed NASA mission designed to use high-resolution X-ray spectroscopy to study the formation and evolution of stars and galaxies. 2. Organizations and Foundations Apply for A Grant - Arcus Foundation
: In weather science, an arcus cloud is a low, horizontal, roll-shaped cloud formation that typically appears at the leading edge of a thunderstorm or cumulonimbus. : Arcus was a proposed NASA mission designed
: The term is used to describe arch-like structures in the body. A common example is arcus senilis , a white or gray ring that develops around the cornea of the eye, often seen in older adults. an arcus cloud is a low