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Big Bang Theory
| Term | Definition |
|---|---|
| Big Bang Theory | a cosmological model of the observable universe from the earliest known periods through its subsequent large-scale evolution. |
| Visible Light Spectrum | the portion of the electromagnetic spectrum that is visible to the human eye. |
| Cosmic Microwave Background Radiation (CMB) | thought to be leftover radiation from the Big Bang, or the time when the universe began. |
| Helium | a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas |
| Red Shift | an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation. |
| Blue Shift | |
| Spectrograph | an instrument that separates incoming light by its wavelength or frequency and records the resulting spectrum in some kind of multichannel detector |
| Energy | the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object |
| Universe | all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. |
| Galaxy | a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. |
| Astronomy | a natural science that studies celestial objects and phenomena |
| Albert Einstein | a German-born theoretical physicist, universally acknowledged to be one of the two greatest physicists of all time. Developed the theory of relativity, one of the two pillars of modern physics. |
| Edwin Hubble | Discovered an electromagnetic property called the Red Shift. Explained why galaxies appear to be accelerating away from the each other. |
| Electro- magnetic Spectrum | the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies. |
| Hydrogen | the chemical element with the symbol H and atomic number 1. Lightest element. |
| Fred Hoyle | English astronomer, Fred Hoyle, coined the phrase Big Bang in 1949. Most scientists consider it to be the most likely scenario for the birth of the universe. |
| Arno Penzias and Robert Wilson | They discovered the cosmic microwave background radiation. |
Created by:
Manachanwa
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