An object is transported to three different planets in our solar system. Which of the following is true about that object?

- - The object's weight is different on each planet, while it is

apparently weightless during the trips in between.

- - On some if not all of the three planets, the object needs to be

surrounded by protection from heat, cold, poisonous gases, or

solar radiation.

- - If the object is any kind of life form, then its circadian rhythm is

all screwed up, and it is having trouble sleeping.

- - The object has accumulated a huge balance of frequent flier miles.