A 50-K dense cloud is a blackbody.
a. True
b. False
Indicate whether the statement is true or false
Question 2
Galileo's telescopic discoveries of mountains on the Moon and spots on the Sun were controversial because they suggested that the Sun and Moon
a. were the same kind of object.
b. were not perfect spheres.
c. were inhabited.
d. orbited each other.
e. did not orbit Earth.