* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Earth Science
International Ultraviolet Explorer wikipedia , lookup
Rare Earth hypothesis wikipedia , lookup
Theoretical astronomy wikipedia , lookup
Aries (constellation) wikipedia , lookup
Canis Minor wikipedia , lookup
Corona Borealis wikipedia , lookup
Auriga (constellation) wikipedia , lookup
Star of Bethlehem wikipedia , lookup
Dyson sphere wikipedia , lookup
Observational astronomy wikipedia , lookup
Dialogue Concerning the Two Chief World Systems wikipedia , lookup
Cosmic distance ladder wikipedia , lookup
Canis Major wikipedia , lookup
Cassiopeia (constellation) wikipedia , lookup
Corona Australis wikipedia , lookup
Future of an expanding universe wikipedia , lookup
H II region wikipedia , lookup
Stellar kinematics wikipedia , lookup
Cygnus (constellation) wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Astronomical spectroscopy wikipedia , lookup
Perseus (constellation) wikipedia , lookup
Timeline of astronomy wikipedia , lookup
Star formation wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Earth Science Chapter 27 Review A plot of surface temperatures against their absolute magnitude Constellation map A star that experiences regular changes in brightness over time Cepheid variable Cloud of gas and dust in space nebula Apparent change in position of an object resulting from a change in the angle or in the position from which it is viewed parallax Stars in the Northern Hemisphere that circle Polaris circumpolar A display of colors and lines made when starlight passes through a device for separating light spectrum Patterns of stars that appear fixed in the sky constellations A device for separating light into different colors spectroscope Measure of a star’s brightness as it appears from earth Apparent magnitude An explosion 100 times brighter than a nova supernova Process in which smaller atomic nuclei combine into larger atomic nuclei Nuclear fusion Body of gas that gives off radiant energy in the form of light and heat star Happens when a star moves away from the earth Red shift All stars have ____ composition. different Which apparent magnitude would appear brightest? 10, 5, or -5? 5 A large group of stars galaxy Stars have all ____ colors. different What stage is the earliest development of a star? Neutron star Object with gravity so great that not even light can escape it Black hole How far is the sun from the earth? 8.3 light-minutes What stage of stellar evolution is the longest? Main-sequence Brightness of a star as it appears from earth Apparent magnitude A star’s actual motion (can/cannot) be seen with the naked eye. cannot What would a star moving toward the earth display? Blue shift Graph that shows the relationship between temperature and magnitude of a star HR diagram A main-sequence star maintains a stable size as long as it has an ample supply of hydrogen to fuse into _____. helium What stage of stellar evolution is characterized by the fusion of hydrogen atoms into helium atoms? Main-sequence Stars too massive to form neutron stars may form a Black hole In which stage of stellar evolution does combined hydrogen fusion and helium fusion cause a star’s outer shell to expand? Red giant At what temperatures within a protostar does nuclear fusion begin? 10,000,000 degrees C Which type of star maintains a stable size because the energy from fusion balances the force of gravity? Main-sequence How much of its hydrogen has the sun converted to helium? 5%