Which of the following statements about Kepler's laws is false?
A) Kepler's laws provide mathematical descriptions of the motion of the planets.
B) Kepler's first law states that planetary orbits are shaped as ellipses.
C) Kepler's second law implies that when planets are closer to the sun, they move faster.
D) Kepler's laws explain why planets with larger semi-major axes have much longer orbital periods.
Question 2
A star is observed with a surface temperature of 3,000 K and a luminosity of 102 solar. What is the approximate mass of this star?
A) 0.5 Msun B) 0.9 Msun
C) 0.2 Msun D) The mass cannot be determined.
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