What are sources of light pollution and how do those affect astronomical observations?
What will be an ideal response?
Sources of light pollution are artificial outdoor lighting or the Moon. Light pollution can make it impossible to see faint objects.
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The best determination of the Hubble constant using Cepheid variables found in distant galaxies by the Hubble telescope suggests
a. that the Hubble constant is about 0.07 km/sec/Mpc. b. that the Hubble constant is about 7 km/sec/Mpc. c. that the Hubble constant is about 70 km/sec/Mpc. d. that the Hubble constant is about 700 km/sec/Mpc.
The apparent visual magnitude of a star is a measure of the star's
a. size. b. intensity. c. distance. d. color. e. temperature.
What is the change in entropy of the lead when 2.0 kg of molten lead at its melting point temperature solidifies? For lead: LV = 207 kcal/kg at 1744°C, LF = 5.9 kcal/kg at 328°C
What will be an ideal response?
What characteristic of a telescope controls the amount of light captured by the telescope?
a. resolving power b. magnifying power c. size of eyepiece d. number of mirrors e. diameter of tube