big moving job

Ed Minchau wrote:

> How much energy would it take to move Ceres from its present orbit to
> L5?

Anywhere from none to practically infinite, depending on how you
go about doing it.

- None if you use a lightsail (we are talking about a lightsail of
almost galactic proportions- exageration)

- almost infinite if you try to use a very high velocity rocket
engine (most of the energy ends up in the exhaust in that
case)