The flashcards below were created by user
RichardLam1835
on FreezingBlue Flashcards.
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Milky Way:
Is a galaxy that contains our solar system and is a spiral system.
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Galaxy:
Is a collection of billions of stars, gas and dust held together by gravity. A galaxy isn't a consistent size and shape.
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Star Clusters:
- Are groups of stars that are held together by gravity and travel together, they range from 10 - a million stars.
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Open Clusters:
Are a collection of 50 - 1000 stars and they appear along the main bend of the Milky Way.
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Globular Clusters:
Are a collection of 100 000 - a million stars arranged in a spherical shape, and appear around the centre of the Milky Way.
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Local Group:
Is a group of 40 galaxies including the Milky Way, and the diameter is about 10 million light years.
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Super Cluster:
A gigantic cluster of 4 - 25 galaxies which is hundreds of millions of light years on size.
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Shapes of Galaxies:
- 1) Spiral Galaxies: Disk shaped with dusty, curvy turns
- 2) Irregular Galaxies: Are unusually shaped
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Cosmology:
Is the study of the universe.
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Doppler Effect:
Is a phenomenon where spectral lines are slightly displaced from their normal position.
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Redshift:
Is when the wavelength of light from an object is moving away from an observer is lengthened toward the red end of the visible spectrum.
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Blueshift:
Is when the wavelength of light from an object is moving towards the observer is shortened toward the blue end of the visible spectrum.
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Big Bang Theory:
Is a prediction that the universe was extremely compact, small and unimaginably dense.
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Cosmic Microwave Background (CMB)
Is radiation left over from the Big Bang, the temperature of the CMB was -210 degrees celsius
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Radiation:
Is a process where electromagnetic waves travel through a vacuum.
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Dark Matter:
Is the missing mass from galaxies, it's one of the most abundant form of matter in the universe.
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Dark Energy:
Is the accelerating of the universe outwards even though it should be shrinking.
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