The universe is expanding. Does it mean that the distance between sun and earth is increasing?
If yes, will sunlight, at some point of time, take more than 8 min 20 sec to reach earth?
And will it have any effect on earth's motion around sun?

Question

The universe is expanding. Does it mean that the distance between sun and earth is increasing?
If yes, will sunlight, at some point of time, take more than 8 min 20 sec to reach earth?
And will it have any effect on earth's motion around sun?

anonymous · Answer

Yes since the universe is expanding which would indicate that the distance between the sun and the earth is also increasing

anonymous · Answer

I think that the speed of light is constant so if the distance increases the time taken will increase proportionately. I think this will lead to a longer orbit period but you had better look up Keppler's laws of planetary motion.

anonymous · Answer

the speed of light is constant at 3x10^8 m/s. Kepler's first law is the law of orbitis. The law of orbits states that all planets move in elliptical orbits, with the sun at one focus.