Our satellites still encounter some resistance from the atmosphere, so when they run out of propellant they will crash back down to earth. As well as the fact they are very vulnerable to solar radiation and impacts from small meteors and other space debris.
The objects on the moon are persevered in a vacuum and will not have to face erosion and corrosion, and barring a direct impact from a meteor they will remain there indefinitely
Same amount of time possibly, Most people who have answered forgot about Voyager 1 and 2 which as long as they don't hit anything outside of the solar system could last a very long time.
What will remain longer: some of our satellites, or the stuff we left on the moon?
What will remain longer: some of our satellites, or the stuff we left on the moon?
I guess I was really asking if all orbits decay. Those geocentric satellites are 23,000 miles up there. Would their orbits actually decay in a few million years?
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