LEO vs. L1

--- "jdr7181 " wrote: Is there a signficant difference in launch costs between launching from the Earth to LEO and launching from the Earth to L1? (I found Yes. Delta-V from surface of Earth to LEO at 300 km altitude is about 7,800 metres per second. No. It's more like 9,300-10000 meters per second. There's losses in the atmosphere and some losses called 'gravity losses' where you've carried the fuel up with you before burning it, it wastes delta-v/fuel to do that. 7,800 meters per second would be right if there was no atmosphere and the burn was instantaneous at ground level, but the rocket comes apart if you try that, or the astronauts do ;-)
Delta-V from surface of Earth to LTO (Lunar Transfer Orbit - which gets you to L-1 or the Moon) is about 10,500 metres per second. No these are too low too, by about the same delta-v.
Charles R.