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Flashcards - Understanding Stars, Solar Systems & Galaxies

Flashcards - Understanding Stars, Solar Systems & Galaxies
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solar nebula theory
The nebular hypothesis is the most widely accepted model in the field of cosmogony to explain the formation and evolution of the Solar System
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diffraction grating
In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions
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Dark Age

The Dark Age of the universe is a period where the glow from the Big Bang shifted into infrared wavelengths.

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half-life
Half-life is the time required for a quantity to reduce to half its initial value
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white dwarf
A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter
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red giant
A red giant is a luminous giant star of low or intermediate mass in a late phase of stellar evolution
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positron
The positron or antielectron is the antiparticle or the antimatter counterpart of the electron
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Doppler effect
The Doppler effect is the change in frequency or wavelength of a wave for an observer moving relative to its source
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Doppler effect
The Doppler effect is the change in frequency or wavelength of a wave for an observer moving relative to its source
positron
The positron or antielectron is the antiparticle or the antimatter counterpart of the electron
red giant
A red giant is a luminous giant star of low or intermediate mass in a late phase of stellar evolution
white dwarf
A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter
half-life
Half-life is the time required for a quantity to reduce to half its initial value
Dark Age

The Dark Age of the universe is a period where the glow from the Big Bang shifted into infrared wavelengths.

diffraction grating
In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions
solar nebula theory
The nebular hypothesis is the most widely accepted model in the field of cosmogony to explain the formation and evolution of the Solar System
solar system
The Solar System is the gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly
recombination epoch
In cosmology, recombination refers to the epoch at which charged electrons and protons first became bound to form electrically neutral hydrogen atoms
terrestrial planets
A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals
black hole
A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing-not even particles and electromagnetic radiation such as light-can escape from inside it
galaxy
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter
nebula
A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases
Radio telescopes
A radio telescope is a specialized antenna and radio receiver used to receive radio waves from astronomical radio sources in the sky in radio astronomy
Refracting telescopes
A refracting telescope is a type of optical telescope that uses a lens as its objective to form an image

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