1. Stellar parallax measurements are used in astronomy to determine which of the following properties of stars? a. speeds, b. rotation rates, c. distances, d. colors, e. temperatures 2. The brightness...

1. Stellar parallax measurements are used in astronomy to determine which of the following properties of stars? a. speeds, b. rotation rates, c. distances, d. colors, e. temperatures

2. The brightness a star would have if it were at 10 pc from Earth is called its a. absolute magnitude, b. apparent magnitude, c. luminosity, d. spectral type, e. center of mass