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Parra
Parra, Astronomy Vocab
| Term | Definition |
|---|---|
| Astronomy | The study of the moon, stars, and other objects in space |
| Doppler shift | a change in frequency |
| Red shift | towards you |
| Blue shift | away from you |
| frequency | the number of complete wavelengths that pass a point in a given time |
| Cosmology | study of the universe |
| Wavelength | The distance between two parts of a wave |
| Absolute Brightness/magnitude | the brightness a star would have if it were at a standard distance from earth |
| Apparent Brightness/magnitude | how bright a star appears from earth |
| Cosmic Microwave Background | Thermal radiation left over from the Big Bang |
| Universe | All of space and everything in it |
| Galaxy | A collection of stars, dust, and gas bound together by gravity |
| Star | a fixed luminous point in the night sky that is a large, remote incandescent body like the sun. |
| Planet | a celestial body moving in an elliptical orbit around a star. |
| Electromagnetic Spectrum | the range of wavelengths/frequencies over which electromagnetic radiation extends. |
| Astronomical Unit | AU, the average distance between the earth and the sun |
| Solar Nebula | A large cloud of gas and dust such as the one that formed our solar system |
| Gas Giant | The name given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune |
| Nuclear Fusion | The process by which two or more small nuclei fuse to make a bigger nucleus |
| Convective Zone | region of the sun where gases circulate in currents, bringing the sun's energy to the surface |
| Photosphere | The inner layer of the sun's atmosphere |
| Constellations | a group of stars that forms an imaginary outline or patterns |
| Chromosphere | The middle layer of the sun's atmosphere |
| Corona | The outer layer of the sun's atmosphere. |
| Sunspot | a cooler darker spot appearing on the sun's photo sphere |
| Prominence | loop of gas that stick out from the sun's surface, linking parts of sunspot regions |
| Solar Flare | sudden eruption of intense high energy radiation from the sun's surface |
| Coronal Mass Ejection | a large explosion of matter and energy from the Sun |
| Parallax | the effect where the position/direction of an object appears to differ when viewed from different positions |
| Main Sequence | a series of star types to which most stars belong |
| HR Diagram | A graph relating the temperature and brightness of stars |
| Nebula | A large cloud of dust and gas in space |
| Red Giant | A star that expands and cools once it runs out of hydrogen fuel |
| White Dwarf | a small very dense star that is typically the size of a planet |
| Nova | a star that increases thousands of times in brightness and then fades |
| Neutron Star | the small, dense remains of a high-mass star after a supernova |
| Pulsar | a rapidly spinning neutron star that emits rapid pulses of radio and optical energy |
| Black Hole | there is one at the center of every galaxy and have so much gravitational pull that even light can't escape its pull |
Created by:
addy42
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