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Big Bang Theroy(BBT)
| Term | Definition |
|---|---|
| Big Bang Theory | the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today |
| Visible Light Spectrum | the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. |
| Cosmic Microwave Background Radiation (CMB) | Scientists thought if there was a BB, then there must be remnants of energy left out there in the far reaches of the universe. It was called “relic” radiation. |
| Helium&Hydrogen | Using powerful telescopes, scientists have concluded the universe consists of mainly hydrogen (74%) and helium (25%). These are the lightest elements. Heavier elements make up the other 1%. |
| Red Shift | Think of the Doppler Effect when a fire truck passes. The sound waves are compressed in front of the train and make a high frequency sound. |
| Blue Shift | with a corresponding increase in frequency, of an electromagnetic wave; the opposite effect is referred to as redshift. In visible light, this shifts the color from the red end of the spectrum to the blue end. |
| Spectrograph | scientific instrument used to separate and measure spectral components of a physical phenomenon. |
| Energy | power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines. |
| Universe | The universe is finite and expanding, All matter, energy, and space was once squeezed into a very small volume. This resulted in a sudden expansion known as the Big Bang. |
| Galaxy | Occurred 13.7 billion years ago, Galaxies expand throughout the universe like raisins baked in a cake. They become more distant from each other as the cake rises. |
| Astronomy | a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. |
| Albert Einstein | General Theory of Relativity and Sir Isaac Newton’s original Theory of Gravity concluded the universe was static (lacking movement). |
| Edwin Hubble | 1929 – Discovered an electromagnetic property called the Red Shift, Contrary to Einstein the Universe was expanding |
| Electro-magnetic Spectrum | the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies |
| Fred Hoyle | English astronomer, Fred Hoyle, coined the phrase Big Bang in 1949. There is much more supporting evidence, which is not included in this lesson. |
| Arno Penzias and Robert Wilson | using a large horn antenna in 1964 and 1965 to map signals from the Milky Way, when they serendipitously discovered the CMB. ... The CMB is "noise" leftover from the creation of the Universe. |
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Chloe1088
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