Galaxy effective radius or half-light radius ( R e {\displaystyle R_{e}} ) is the radius at which half of the total light of a galaxy is emitted. This...

respectively. Antenna equivalent radius Cloud drop effective radius Cubic mean Earth ellipsoid Earth radius Galaxy effective radius Geoid Geometric mean Semidiameter...

half-light radius (also known as effective radius; Re) is a measure that is based on the galaxy's overall brightness flux. This is the radius upon which...

stars currently known, ordered by radius and separated into categories by galaxy. The unit of measurement used is the radius of the Sun (approximately 695...

all baryonic matter in the galaxy may be 1010 solar masses. The contribution of the dark matter component out to a radius of 55×10^3 ly (17 kpc) is equivalent...

accompanied by an ultra-compact dwarf galaxy, discovered in 2009, with an absolute magnitude of −12.3, an effective radius of just 47.9 ly (3.03 million astronomical...

commonly used in the astronomical literature is the galaxy effective radius where 50% of the total galaxy's light was emitted; variations of 60%, 70%, and...

is the diatomic hydrogen (H2), with a bond length of 0.74 Å. Effective molecular radius is the size a molecule displays in solution. The table of permselectivity...

extends to a radius of about 150 kiloparsecs (490,000 light-years), where it is truncated—possibly by an encounter with another galaxy. Its interstellar...

elliptical galaxies. Some correlations have been empirically shown. The fundamental plane is usually expressed as a relationship between the effective radius, average...