(Round planetary distances to the nearest 10 million) The moon is about 384,000 km from Earth. About how much farther will astronauts travel when they visit Mars than the when we went to the Moon in the early nineteen seventies?
In the distant future, a certain astronaut rented a space ship and flew from Earth to visit his cousin in the space station that orbited Mercury. Then he zipped back to Mars to see his girl friend in the Martian Planetary Beauty Pageant. When he returned to Earth he returned the space craft to the rental agency. About how many km should he be charged for?
The circumference of a circle is found by multiplying the diameter x pi (3.14). Using 3 for pi and rounding to the greatest place value, about how many km is the circumference (equator) of Earth?
The circumference of a circle is found by multiplying the diameter x pi (3.14). Using 3 for pi and rounding to the greatest place value, about how many km is the circumference (equator) of Mars
The circumference of a circle is found by multiplying the diameter x pi (3.14). Using 3 for pi and rounding to the greatest place value, about how many more km would a trip around the equator of Earth be than a trip around the equator on Mercury?