Given that the Sun is estimated to be about five billion years old, scientists estimate that we are about halfway through its li
fetime. This means that the Sun’s lifetime is expected to be what length of time? 1. 10 billion years
2. 5 billion years
3. 20 billion years
4. 5 billion years
Explanation: Kepler's first law states that all orbiting bodies move along circular, elliptical, hyperbolic, or parabolic orbits. This law goes against one of the primary ideas of Copernicus's model.