According to Newton's principle ______.
A: the force of gravity keeps planets orbiting around the sun rather than flying off
B: the sun is the most massive object, making up 99.8 percent of the mass of the solar system
C: the amount of mass determine how fast the objects travel as they orbit each other
D: Pluto receives the least force of gravity from the sun of all the planets in the solar system
A: the force of gravity keeps planets orbiting around the sun rather than flying off
B: the sun is the most massive object, making up 99.8 percent of the mass of the solar system
C: the amount of mass determine how fast the objects travel as they orbit each other
D: Pluto receives the least force of gravity from the sun of all the planets in the solar system
举一反三
- The solar system in astronomy consists of the sun and its planets. EXCEPT （）, all the planets got their names from Greco-Roman mythology. A: Mars B: Earth C: Venus D: Jupiter
- All the planets in solar system EXCEPT ______ got their names from Greeo-Roman mythology. ( ) A: Earth B: Mars C: Jupiter D: Pluto
- 1. According to the text, the similarity of naming the planets of the solar system is that they are all named after ________.
- 在太阳系所有的行星中，哪颗行星离地球最近呢？ A: In all the planets in the solar system, which planet is closest to the Earth? B: Among all the planets in the solar system, which planet is near to the Earth? C: Of all the planets in the solar system, which planet is closest to the Earth?
- Corresponding to the sun in the solar system is the nucleus of the atom.