The Universe
Vocabulary concerning the universe outside of our solar system
Terms
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- Irregular Galaxy
- A cluster of stars and satellites without a distinguished shape
- Binary system
- Companion stars that appear as one to us on earth
- Black hole
- A region so dense that even light cannot escape it
- Neutron star
- A star that is highly radioactive and magnetic but very small
- Magnitude
- A stars brightness
- 13.73 billion years
- The approximate age of the universe
- Nebula
- Gases and dust that start a stars "birth"
- Milky Way
- The galaxy in which we live
- Pulsar
- A neutron star than spins and emits radio waves
- Apparent magnitude
- The amount of light actually being seen on earth
- Supernova
- An exploding massive star is called a __________
- Big Bang
- Generally accepted theory about the beginning of the universe
- Helium
- Stars produce energy by fusing hydrogen atoms into _______atoms
- Parallax effect
- How nearby stars distance from earth is determined
- Spiral Galaxy
- A galaxy with arms extending from it
- Expanding
- The Red Shift indicates that the universe is _____________
- Light year
- Astronomical measuring unit used by cosmologists
- Gravity
- Internal __________ determines the shape of a galaxy
- Big Crunch
- A theory of the end of the universe that has it collapsing upon itself
- Blue
- The hottest stars in the universe are ____________ in color
- Elliptical Galaxy
- The most common type of galaxy
- Galaxies
- Masses of closed gravitational systems of stars and their satellites
- Red Shift
- Indicates that the galaxies are moving away from each other
- Universe
- The entire celestial cosmos, an orderly and harmonious system
- Red
- The coolest stars in the universe are __________ in color
- White dwarf
- Our Sun will become this type of star eventually
- Constellations
- Groups of stars that appear to form pictures
- Absolute magnitude
- The actual amount of light emitted from a star
- Main sequence
- The most common type of star
- HR Diagram
- Depicts the classification of stars in the universe