Given that Mercury, Mars, and some of the moons of the gas giants are covered with craters, why do we not see lots of impacts happening today?
A) All the planetesimals have collided with planets already.
B) We would, but the impacts have always happened at a very slow rate and built up over billions of years.
C) Most of the impacts happen on the far sides of these bodies.
D) Gravitational interactions between planets and planetesimals ejected most of the larger debris.
Correct Answer:
Verified
Q29: What is gravitational lensing?
A) the use of
Q30: How have astronomers discovered planets orbiting a
Q31: Measuring the changing light output of a
Q32: Alien astronomers are using the radial-velocity method
Q33: Which of the following observations does not
Q35: Thinking about the formation of the solar
Q36: What is the name of the nebula
Q37: Which property of the Solar nebula was
Q38: The process in which a gas cools
Q39: Which was the last part of the
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents