* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Star Vocabulary
Survey
Document related concepts
Reflecting instrument wikipedia , lookup
Chinese astronomy wikipedia , lookup
Corona Australis wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Dyson sphere wikipedia , lookup
Cygnus (constellation) wikipedia , lookup
Astronomical unit wikipedia , lookup
Malmquist bias wikipedia , lookup
Star of Bethlehem wikipedia , lookup
Perseus (constellation) wikipedia , lookup
Star formation wikipedia , lookup
Timeline of astronomy wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Transcript
Star Vocabulary 1. Apparent Magnitude- a measure of how bright a star appears to an observer. 2. Absolute Magnitude- a measure of how bright a star would be if all stars were at the same distance. 3. Luminosity- the actual brightness of a star. Depends only on the size and temperature of the star. 4.Doppler Effect- change in the observed frequency of a wave when it moves toward or away from an observer. 5. Red Shift - a shift toward longer wavelengths of the spectral lines emitted by a celestial object that is caused by the object moving away from the earth. 6.Emission Spectrum- Series of unevenly spaced lines of different colors. Every element is unique. 7. Absorption Spectrum- A continuous spectrum crossed by dark lines. Form when light is passed though a cool gas. 8. Spectroscope- Splits white light into a spectrum. Helps astronomers determine a star’s composition. 9. Parallax - Parallax is the way an object’s position or direction seems to change depending on viewing angle. To experience this phenomena, simply cover one eye and focus on an object. Then move the cover to the other eye. Because each eye provides a different viewing angle, the object will appear to move. Astronomers can calculate the distance to a star by knowing the angle between 2 observed positions and the distance between the observation points