In your travels through space, if you were to encounter a planet that was large but had no atmosphere, only pools of liquid, what might have happened?
A) The planet's atmosphere escaped into space because the force of gravity was too low.
B) The planet's atmosphere escaped because it was heated too hot and boiled into space.
C) The atmosphere never formed because there was not enough heat energy available.
D) Only planets with life have an atmosphere.
E) none of the above
Question 2
In your travels through space, if you were to encounter a planet that was very large but had no atmosphere, what might have happened?
A) The planet's atmosphere escaped into space because the force of gravity was too low.
B) The planet's atmosphere escaped because it was heated too hot and boiled into space.
C) The atmosphere never formed because there was not enough heat energy available.
D) Only planets with life have an atmosphere.
E) none of the above
True-color view of Mars seen through NASA's Hubble Space Telescope in 1999
Large-Flowered Leafcup
Image of an Almost-Extrasolar Planet
Planet George
Joseph Moore and His Family (1839), by Erastus Salisbury Field, reflects the emerging middle-class f
International space station