Concept
Strömgren Sphere
The ionised bubble around a hot star.
The theoretical region of fully ionised hydrogen surrounding a hot O- or B-type star, bounded where ionisations balance recombinations.
Overview
The theoretical region of fully ionised hydrogen surrounding a hot O- or B-type star, bounded where ionisations balance recombinations.
See also
Co-orbital Object
A body sharing another's orbit around its star.
Heliopause
The edge of the Sun's bubble in space.
Event Horizon
The point of no return around a black hole.
Warm Ionized Medium
Diffuse ionised gas spread through the galactic disc.
The Big Bang
How everything began, 13.8 billion years ago.
Black Holes
Regions where gravity stops light itself.