Questions tagged [galactic-halo]

Questions about the roughly spherical component that extends beyond the visible part of a galaxy, made of a sparse field of stars and globular clusters, gas and dark matter.

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How do disk-shaped galaxies then form at the sites of spherical galactic halos? Do the halo stars start orbiting or just sit in place?

Phys.org's Astronomers detect large amounts of oxygen in ancient star's atmosphere mentions "Stars like J0815+4729 are referred to as halo stars," explained UC San Diego astrophysicist Adam ...