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Adriana Ramirez
ESPS Astronomy Vocab
| Term | Definition |
|---|---|
| Astronomy | The study of stars and planets. |
| Big Bang Theory | Theory that the universe originated in a huge explosion that releases all matter and energy. |
| Red shift | Moving away from the observer. |
| Blue shift | Moving closer to the observer. |
| Frequency | How many wave peaks pass a certain point per given time. |
| Wavelength | The distance between two corresponding parts of a wave. |
| Absolute Brightness (magnitude) | The brightness a star would have if it were at a standard distance from earth. |
| Cosmic MIcrowave Background. | Radiation left over from the big bang. |
| Universe | Space and all the matter and energy in it. |
| Galaxy | A collection of stars, dust and gas bound together by gravity. |
| Electromagnetic Spectrum | The range of wavelengths or frequencies over which electromagnetic radiation extends. |
| Astronomical Unit | The distance from the Earth to the Sun. |
| Light year | The distance that light travels in one year. |
| Cosmology | Study of the universe. |
| Apparent Brightness (magnitude) | How bright a star appears from Earth. |
| Solar System | The sun and all of the planets and other bodies that travel around it. |
| Star | A ball of hot gas, primarily hydrogen and helium that undergoes nuclear fusion. |
| Planet | A large body in space that orbits a star and does not produce light of its own. |
| Solar nebula | The cloud of gas and dust that formed our solar system. |
| Gas giant | A large planet that consist of mostly of gases. |
| Nuclear Fusion | The process by which two or more small nuclei fuse to make bigger nucleus. |
| Main sequence | The location on the HR diagram where most stars lie. |
| HR diagram | Classifies stars by temperature and absolute brightness. |
| Red giant | A large reddish star late in its life cycle. |
| White dwarf | A small, hot star that is the left over center of an old star. |
| Neutron Star | A star that has collapsed under its own gravity. |
| Pulsar | A neutron star that produces radio waves. |
| Blackhole | A star in which light cannot escape. |
| Nova | A star that suddenly becomes brighter. |
| Doppler shift | The shift that changes to a different wavelength. |
| The convention zone | Columns of hot gas and ride, cool and descend. |
| Photosphere | The inner layer of the sun's atmosphere. |
| Chromosphere | The middle layer of the sun's atmosphere. |
| Corona | The outer layer of the sun's atmosphere. |
| Sunspot | A dark area of gas on the sun's surface that is cooler than the gases that are surrounded. |
| Prominence | A huge reddish loop of gas that stand out from the sun's surface linking parts of sunspot regions. |
| Solar Flare | A sudden eruption of high energy radiation from the sun's surface. |
| Coronal Mass Ejection | A large explosion of matter and energy from the sun. |
| Parallax | The apparents change in position of an object when it is seen from different places. |
| Nebular | A model that describes the sun and the solar system forming together out of a cloud of gas and dust. |
| Constellations | Patterns of stars in the sky. |
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adriana.ramirez
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