5 Written questions
5 Matching questions
- Optical Double
- Pulsating Variables
- Eclipsing Binary
- Spectral type F
- 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 Stars not physically related to each other but happen to line up so that we see what appears to be a double star system. More rare than one would think.
- c Pair of stars that orbit in the plane of our line of sight causing it to "blink". Often listed as EBS. (Algol in the Iliad by Homer)
- d One of the two major classes of variables. There are five classes. One important example: Cepheid Variables.
- e Pale Yellow - Temperature range: 6,000-7,500
5 Multiple choice questions
- Referred to as the H-R Diagram. Plots two stellar properties. The star's temperature (spectral class) and the star's Luminosity - measured either by solar units (against our Sun) or Absolute Magnitude.
- Yellow - Temperature range: 5,000 - 6,000 K.
- A star's life path as shown on a Hertzsprung-Russell Diagram.
- Next closest star after the Sun. Part of the three-star Alpha Centauri system. 4.3 light years away. (50 mile high stack of toilet paper stretched out 1 sheet = 1 million miles scale. Parallax angle of 0.77 arcsecond. From the Sun, 1.3 pc or 4.3 ly away or 3.98 x 10^13 km (2.43 x 10^13 miles). Largest Parallax angle we see.
- Next closest after Proxima Centauri. 6 light years away. Next there are about 30 stars within 16.5 light years of earth.
5 True/False questions
Betelgeuse → Spectral type F (pale yellow) Temperature range: 6,000-7,500 K.
Cataclysmic Variables → One of the major classes of variables.
White Dwarfs → Cool stars which are a little smaller and dimmer than the supergiants.
Spectral type K → Pale Blue -Temperature range: 10,000 - 30,000 K
Rigel → Spectral type B (pale blue) Temperature range: 10,000 - 30,000 K