Which of the following statements about our Sun is not true?
A) The Sun contains more than 99 of all the mass in our solar system.
B) The Sun is a star.
C) The Sun's diameter is about 5 times that of Earth.
D) The Sun is made mostly of hydrogen and helium.
Question 2
Galileo observed all of the following. Which observation offered direct proof of a planet orbiting the Sun?
A) four moons of Jupiter
B) patterns of shadow and sunlight near the dividing line between the light and dark portions of the Moon's face
C) phases of Venus
D) The Milky Way is composed of many individual stars.