5 Written Questions
5 Matching Questions
- Parallax Shift
- Proxima Centauri
- Barnard's Star
- Spectral type A
- Absolute Magnitude
- a Brightness if we moved all the stars to the same distance. 10 pc. (Comparing apples to apples)
- b 1/2 the star's shift back and forth, in degrees.
- c 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.
- d Next closest after Proxima Centauri. 6 light years away. Next there are about 30 stars within 16.5 light years of earth.
- e Aqua - Temperature range: 7,500 - 10,000 K
5 Multiple Choice Questions
- The Sun
- Pair of stars that we can see orbiting each other.
- What we see in the sky. Star Charts and planispheres use different size "dots" to represent.
- A Star's total amount of power radiated into space; measured in watts
- Two stars that are so close that the only way we can detect the binary nature is through a spectral (red) shift.
5 True/False Questions
Binary Stars → Stars that appear to change in brightness.
Sun → Spectral type A (aqua) Temperature range: 7,500 - 10,000 K
Spectral type B → Pale Blue -Temperature range: 10,000 - 30,000 K
Supergiants → Cool stars which are very large and very bright.
Sirius → Spectral type A (aqua) Temperature range: 7,500 - 10,000 K