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About this set
Created by:
erkillian5 on March 8, 2010
Subjects:
Classes:
Ryan Weems, trinity kids, IAC Astronomy Club - India
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51 terms
Terms | Definitions |
|---|---|
 gravity | the force that pulls matter in stars together |
| closed universe | the type of universe that expands and comes back together repeatedly |
| open universe | the idea that supports the belief that everything in the universe may eventually disappear |
| Big bang | the theory that is based on the assujmption that our present universe is the result of the expansion of matter from a single point |
| name some contellations | orion, little dipper, zodiac consellations |
| an example of a spiral galaxy | the milky way |
| an irregular gallaxy | large and small magallenic clouds |
| globular stars are clustered in | a sphere |
| how are opened clusters are gathered | they are all spread out |
| blue | the color of things that are approaching earth |
| red | the color of the shift for an object moving away from the earth |
| spectrum | the band of colors formed when light passes through a prisim |
| visible light | what opitacl telescopes ditect |
| evidence that supports the big bang theory | an expanding universe and background radiation |
| pulsating variable stars | are stars that change in size and brightness |
| how do we measure the distance to stars | a formula using apparent magnitude and absolute magnitude with parallax and red shift |
| Parallax | is how we measure stars that are less than 100 light years away |
| magnitude | refers to a stars brightness |
| herzsproung-russell diagram | gives information about color, surface temp and brightness |
| tempereture of a star | determines it's color |
| pulsars | are neutron stars |
| supernova | is an explosion of a massive star |
| hydrogen | is the most common element of a star |
| starting mass | shapes the life and death of a star |
| binaries | are paired or a set of two stars |
| novas | are stars that increase in brightness and then get dim |
| small starting mass | is a good indication that a star will live the longest |
| hydrogen | makes up 60% of the mass of a typical star |
| black holes are | formed by super massive stars |
| light years | measure distance |
| the hottest stars | are blue |
| the percent of stars in the main sequence | 90% |
| Hubble | proved that more galaxies exisit outside of the milky way |
| proxima centauri | is the closest star to earth |
| telescopes that study stars | have to move at the same speed but in the opposite direction of the earth |
| nebula | how scientists believe our solar system began |
| promary gass present when our solar system formed | hydrogen |
| when did our protosun become a star | when hydrogen present in the protosun fused into helium atoms |
| some components of the electromagnetic cpectrum | x-ray, uv, radio, and infared |
| nebular theory | states that the solar system began in a vast gas cloud |
| heat energy | is another name for infared energy |
| x-ray | is the component of the electromagnetic spectrum that is least able to pass through earths atmosphere |
| refracting telescope | uses a series of lenses to focus and magnify light |
| optical telescope | collects and focuses light from distant objects |
| VLA telescope | is a type of radio telescope |
| quasar | a distant galaxy with a black hole at the center |
| 3 ways to classify stars | size, brightness, and temp. |
| observatory | a building with 1 or more telescopes |
| 2 types of star magnitudes are | apparent (how it looks from earth) and absolute (how bright each star would be from a set distance from earth) |
| starting mass | shapes the life and death of a star |
| reflecting telescope | uses a series of mirrors to focus light from the stars, the largest visible light telescope |
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