The Milky Way is tilted on the sky because
A. it's appearance depends entirely on where you are on Earth.
B. the disk of the Galaxy is warped.
C. the Solar System is tilted compared to the disk of the Galaxy.
D. the Sun's gravity deflects incoming starlight.
Answer: C
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The amount of oxygen in Earth's atmosphere has gradually grown over the last few billion years.
Answer the following statement true (T) or false (F)
Watch dials contain radium glow because
A. all radioactivity creates light B. batteries supply energy when a button is pushed C. the radiation hits a phosphor D. They don't glow. Only tritium glows.
The surface temperature of a white dwarf is higher than the surface temperature of the Sun.
Answer the following statement true (T) or false (F)
What role does an atmosphere play in surface habitability?
A) it exerts a pressure which allows liquid water to be stable B) it protects the surface against harmful solar radiation C) it helps generate a protective magnetic field D) Both A and B