Concepts in astronomy
Reference list · 3L, 50T
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Parent lists
- Astronomy · 41L, 22T
- Concepts in physics · 12L, 85T
- Concepts in science by field · 17L
Sub-lists
3
- Equations of astronomy · 7T
- Tidal disruption events · 2T
- Unsolved problems in astronomy · 5L, 7T
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50
- Nebula · 3L · Interstellar cloud of dust, hydrogen, helium and other ionized gases
- Star · 9L · Astronomical spheroid of plasma
- Dark matter · 18L · mysterious non-luminous matter (and/or radiation) comprising most of the matter in our observable universe
- Cosmos · 16L · orderly or harmonious system
- Big Bang · 15L · hypothetical begin of the Universe through expansion out of an infinitely small and infinitely dense state
- Spectroscopy · 12L · Study involving matter and electromagnetic radiation
- Galaxy · 4L · Gravitationally bound astronomical structure
- Supernova · 17L · Star exploding at the end of its stellar evolution
- Universe · 13L · All of space and time and their contents
- Comet · 10L · Icy small Solar System body
- Planet · 8L · Class of astronomical body directly orbiting a star or stellar remnant
- Observable universe · 5L · All matter that can be observed from the Earth at the present time
- Active galactic nucleus · 5L · Compact region at the center of a galaxy that has a much-higher-than-normal luminosity
- Proper motion · 5L · Measure of observed changes in the apparent locations of stars
- Supermassive black hole · 6L · Largest type of black hole; usually found at the centers of galaxies
- Inflation (cosmology) · 6L · Theory of rapid universe expansion
- Stellar classification · 9L · Classification of stars based on their spectral characteristics
- Parsec · 6L · Unit of length used in astronomy
- Galaxy formation and evolution · 5L · Processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time
- Tidal force · 7L · A force that stretches a body along the line towards the center of mass of another body due to a gradient in gravitational field
- Magnetosphere · 7L · Region around an astronomical object in which its magnetic field affects charged particles
- Redshift · 6L · Eventual increase of wavelength in radiation during travel
- Quasar · 5L · Active galactic nucleus containing a supermassive black hole
- Gravitational wave · 10L · Propagating spacetime ripple
- Cosmogony · 8L · Branch of science or a theory concerning the origin of the universe.
- Light-year · 7L · unit of astronomical length, defined as the distance that light travels in the vacuum in one year
- Exoplanet · 7L · any planet beyond the Solar System
- Interstellar medium · 8L · matter and radiation in the space between the star systems in a galaxy
- General relativity · 10L · standard and classical physics theory of gravity and space
- Black hole · 7L · Compact astrophysical object with gravity so strong nothing can escape
- Constellation · 12L · Group of stars forming a pattern on the celestial sphere
- Eclipse · 7L · Astronomical event where one body is hidden by another
- Orbit · 7L · Gravitationally curved path of an object around a point in outer space
- Gravitational lens · 7L · Light bending by mass between source and observer
- Newton's law of universal gravitation · 8L · classical mechanics physical law
- Metallicity · 7L · Relative abundance of heavy elements in a star or other astronomical object
- Radial velocity · 6L · Velocity of an object as the rate of distance change between the object and a point
- Main sequence · 6L · A continuous band of stars that appears on plots of stellar color versus brightness
- Molecular cloud · 8L · Type of interstellar cloud
- Stellar evolution · 5L · Changes to a star over its lifespan
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