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Old 06-13-2016, 01:20 AM
Isilder Isilder is offline
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Join Date: Mar 2013
Posts: 4,194
Quote:
Originally Posted by Jonathan Chance View Post
Two things:

1. What is the amount of energy required to move the Earth in such a manner?
The escape velocity at earth's distance is about 42 km/second

From https://en.wikipedia.org/wiki/Escape...ape_velocities

The earth is currently at 30 km/sec


The cheapest way is to boost the earths mass up 12 km/second pro-grade (directly in the line of the orbit - actually instantaneous pro-grade.. as you apply the acceleration you keep it in the actual direction of movement. ) .. Its more expensive to do it by applying the force in some other direction than pro-grade...


Your other question sure reduce the mass of the sun to make the escape velocity (kinetic energy) lesser.. changes the orbit of the earth too