You are racing away from Earth in a super space ship in which you can continually increase your speed by firing engines that never quit. Which of the following best explains how people on Earth will perceive your speed?
A) They will see your speed getting closer and closer to the speed of light, but never reaching it.
B) They will know you are going very fast, but will have no way to know if you ever exceed the speed of light.
C) They will see you speed up until you reach the speed of light, and then your speed will remain constant after that.
D) They will see you going faster and faster until you reach the speed of light, and after that they won't be able to see you any more.
Question 2
We can study how galaxies evolve because
A) galaxies are transparent to visible light.
B) we are really smart astronomers.
C) we can watch as they interact in real time.
D) the farther away we look, the further back in time we see.
Open space is found in a Lodgepole pine stand after thinning.
Map of Mars from Hubble Space Telescope as seen near the 1999 opposition. (North top)
Human Memorabilia in Space
The Increase in Divorce
Earth-Sun Relationships
Earth as a System: The Hydrologic Cycle