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ESPS-TANYA HERNANDEZ
Study guide
| Term | Definition |
|---|---|
| Astronomy | The study of the moon, stats and other objects in space. |
| Big Bang Theory | The theory that the universe originated in a huge explosion that released all matter and energy. |
| Doppler Shift | Electromagnetic waves such as light and results in either a redshift or blueshift. It has been used to measure the speed at which stars and galaxies are approaching us that is, their radial velocities. |
| Red Shift | A shift in the spectra of distant galaxies toward longer wavelengths. |
| Blue Shift | The displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving towards us |
| Frequency | the number of complete waves that pass a given point in a certain amount of time. |
| Wavelength | The distance between two corresponding parts of a wave |
| Absolute Brightness | The brightness of a star if it were a standard distance from Earth |
| Apparent Brightness | The brightness of a star as it appears from Earth |
| Cosmic Microwave Background (CMB) | Thermal radiation left from the Big Bang |
| Universe | Space and all the matter and energy in it |
| Galaxy | Huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity. |
| Solar System | Sun, planets, and all the other objects that revolve around the sun. |
| Star | A ball of hot gas, it has primarily hydrogen and helium it undergoes nuclear fusion. |
| Planet | An object that orbits a star is large enough to become rounded by its own gravity, and has cleared the area of its orbit |
| Electromagnetic Spectrum (EM) | All the frequencies and wavelengths of the electromagnetic radiation |
| AU- Astronomical Unit | A unit of length used for distances within the solar system |
| Solar Nebula | A large cloud of gas and dust, such as the one that formed our solar system |
| Gas Giant | A large giant that consists mostly of gases in a dense form. |
| Nuclear Fusion | A nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy |
| Convective Zone | Region around the sun's radiative zone in which moving gases transfer energy. |
| Photosphere | Surface of the sun |
| Chromosphere | layer of the sun's atmosphere above the photosphere |
| Corona | The outer layer of the sun's atmosphere |
| Sunspot | A dark area of gas on the sun's photosphere that is cooler than the surrounding gases |
| Prominence | A loop of gas that protrudes from the sun's surface, linking parts of sunspot regions |
| Solar Flare | An eruption of gas from the sun's surface that occurs when the loops in sunspot regions connect |
| Coronal Mass Ejection | A large explosion of matter and energy from the sun |
| Light Year | The distance light travels in one year |
| Parallax | The effect the position or direction of an object appears to differ when viewed from different positions |
| Main Sequence | The location on the H-R diagram where most stars lie |
| HR diagram | |
| Nebular | |
| Red Giant | |
| White Dwarf | |
| Nova | |
| Neutron Star | |
| Pulsar | |
| Black Hole | |
| Constellations | |
| Cosmology |
Created by:
tanyah12
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