5 Written Questions
5 Matching Questions
- Apparent Brightness
- Variable Stars
- Magnitude System
- Spectral type F
- a Stars that appear to change in brightness.
- b The amount of light reahing us (per unit area); measured in flux.
- 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 Pale Yellow - Temperature range: 6,000-7,500
5 Multiple Choice Questions
- Spectral type B (pale blue) Temperature range: 10,000 - 30,000 K
- Everything is moving. Overcome by making more than two measurements, take all motions in account, now calculate parallax then distance.
- The Sun
- A Star's total amount of power radiated into space; measured in watts
- Spectral type F (pale yellow) Temperature range: 6,000-7,500 K.
5 True/False Questions
Main Sequence → The distance to an object with a parallax angle of 1 arcsecond; unit is pc. One pc = 3.26 light years (ly) = 3.09 x 10^13 km.
Parallax Shift → 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
Spectral type O → Orange - Temperature range: 3,500 - 5,000 K.
Eclipsing Binary → Pair of stars that we can see orbiting each other.
Spectral type M → Orange - Temperature range: 3,500 - 5,000 K.