If the Sun suddenly became less massive, what would happen to Earth's orbit?
A) Spacetime around the Sun would become flatter, and the Earth, with its current momentum, would exit its orbit around the Sun.
B) Spacetime around the Sun would become less flat, and the Earth would go plunging into the Sun.
C) The Earth's orbital distance from the Sun would increase correspondingly.
D) The Earth's orbital distance from the Sun would decrease correspondingly.
Question 2
The universe as a whole is
A) curved.
B) flat.
C) the shape of a saddle.
D) has yet to be determined, although most astrophysical data points to a flat universe.
Tides on Earth
Moon and Earth
The Orbit and Tails of a Comet
Earth’s orientation
Earth Atmosphere
Idealized Tidal Bulges on Earth