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10 Cards in this Set

  • Front
  • Back
Milky Way
Milky Way
The galaxy containing the solar system, visible as a broad band of faint light in the night sky.
Galaxy
Galaxy
A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
Cosmology
Cosmology
The study of the physical universe considered as a totality of phenomena in time and space.
Redshift
Redshift
An increase in the wavelength of radiation emitted by a celestial body as a consequence of the Doppler effect.
Hubble's Law
Hubble's Law
Astronomy a law stating that the velocity of recession of a galaxy is proportional to its distance from the observer
Big Bang Theory
Big Bang Theory
A cosmological theory holding that the universe originated approximately 20 billion years ago from the violent explosion of a very small agglomeration of matter of extremely high density and temperature.
Cosmic Microwave Background
Cosmic Microwave Background
the cooled remnant of the hot big bang that fills the entire universe and can be observed today with an average temperature of about 2.725 kelvin
Radiation
Radiation
The emission of energy as electromagnetic waves or as moving subatomic particles.
Dark Mattter
Dark Mattter
a type of matter hypothesized to account for a large part of the total mass in the universe.
Dark Energy
Dark Energy
A form of energy hypothesized to reside in the structure of space itself, responsible for the accelerating expansion of the universe