kathleen howell's orbit was a near-retro halo orbit.se it is in the orbit near one of these sweet-spots, it requires very little station-keeping. it does not take much to stay in place. they have these xenon thrusters which are totally cool. carol: you doing ok? jason: i am barely hanging on. peter: you use it up after awhile. but if you are in the sweet spot, the spacecraft can stay where it is longer and you save money. jason: up next, making tiny engines in boston. carol: why the world economy needs a gps backup plan. jason: and the search for the next cancer drug in space. carol: this is "bloomberg businessweek." ? jason: welcome back to "bloomberg businessweek." i'm jason kelly. carol: i'm carol massar. you can also find us online. jason: and on our mobile app. we have a rocket scientist. carol: her company is helping to move around things in space and manage the congestion in the atmosphere. jason: kyle went to boston and hung out with her. let's hear what he had to say. >> a 31-year-old rocket scientist has a very cool startup th

kathleen howell advanced the idea by having this orbit around one of these sweet spot..t this in enthusiasm,of this all of this money going toward not just getting into space, but space exploration. how does this work? >> propulsion is a key point. if you have to constantly be using your thrusters to stay at a certain vantage point from the moon, you will run out of propellant pretty soon. kathleen howell's orbit was a orbit.tro halo because it is near one of these sweet-spots, it requires very little station-keeping. they have these xenon thrusters which are totally cool. carol: you doing ok? jason: i am barely hanging on. peter: you use a busy on after a wild, but if you are in the sweet spot, the spacecraft can stay where it is longer and you save money. jason: up next, making tiny engines in boston. carol: why the world economy needs a gps backup plan. jason: and the search for the next cancer drug in space. carol: this is "bloomberg businessweek.". jason: welcome back to "bloomberg businessweek." carol: you can also find us online a. jason: and on her mobile app. w