The Universe

Absolute Magnitude

Apparent Magnitude

Blue Supergiants

Binary Star System

Black Dwarf

Black Hole

Density

Electromagnetic spectrum

Gamma Rays

Gravitational lensing

Gravity

isotope

Light-year (l.y.)

Magnitude

Main Sequence

Neutrino

Neutron Star

Nuclear fusion

Parallax

Parsec

Plasma

Positron

Planetary Nebula

Radiation pressure

Red Giant

Spectral class

Spectrometer

Stellar parallax

Supermassive black hole

White Dwarf

Big Bang

Blue Shift

Cosmic microwave background radiation

Cosmology

Doppler effect

Milky Way

Red-shift

Steady state theory

Abiogenesis

Accretion

Amino acids

Astrobiology

Cyanobacteria

Gas giant

Hydrocarbon

Moon

Organic compounds

Panspermia

Proteins

Planet

Protoplanetary disk

Protostar

Seismic waves

Terrestrial planet

Supernova