| A | B |
|---|
| parallax | apparent shift in position when viewed from different angles |
| constellation | imaginary pattern of stars in the sky |
| main sequence | part of the classification of stars developed by Hertzsprung and Russell that includes 90% of all stars |
| corona | outer layer of the Sun's atmosphere that can be seen during a solar eclipse |
| photosphere | inner layer of the Sun's atmosphere that gives off visible light |
| galaxy | group of stars, star systems, dust and gas bound by gravity |
| Big Bang | initial explosion that resulted in the formation and expansion of the universe |
| nebula | a large cloud of gas and dust in space spread out in immense volume |
| white dwarf | the blue-white hot core of a star that is left behind after the outer layers have expanded and drifted off into space |
| absolute magnitude | the brightness a star would have if it were at a standard distance from Earth |
| super giant | relatively cool star that has expanded to more than 700 times as large as our sun |
| neutron | the small dense remains of a high-mass star after a super nova |
| chromosphere | the middle layer of the Sun's atmosphere |
| galaxies | spiral(milky way), elliptical, irregular |
