5 Written questions
5 Matching questions
- Magnitude System
- Absolute Magnitude
- a The apparent shift of an object relative to some distant background as the observer's point of view changes. Allows you to determine close stellar distances. Only works with fairly close stars
- b Spectral type B (pale blue) Temperature range: 10,000 - 30,000 K
- c Originated by Hipparchus. A scale to show how bright the stars appear to our eyes (or binoculars and telescopes)
- d Cool stars which are very large and very bright.
- e Brightness if we moved all the stars to the same distance. 10 pc. (Comparing apples to apples)
5 Multiple choice questions
- Super Giants, Giants, Main Sequence, White Dwarfs.
- If we see a star at twice the distance, we see 1/4 the amount of light. If the star is at 10 times the distance, we would see 1/100 the amount of light.
- Group of young, hot stars that are physically related by being held together by gravity. <50 -100> stars.
- White star - Temperature range >30,000 k.
- The amount of light reahing us (per unit area); measured in flux.
5 True/False questions
White Dwarfs → Very, very hot stars which are small in size.
Luminosity → A Star's total amount of power radiated into space; measured in watts
Spectroscopic Binary → Two stars that are so close that the only way we can detect the binary nature is through a spectral (red) shift.
Stellar Mass → Spectral type F (pale yellow) Temperature range: 6,000-7,500 K.
Star's temperature → Next closest after Proxima Centauri. 6 light years away. Next there are about 30 stars within 16.5 light years of earth.