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NASA Goes Bargain Basement With New Satellite
coondoggie writes to tell us that NASA has announced a new low-cost satellite that could be ideal for those who wish to get into space quickly and (relatively) inexpensively. "The Fast, Affordable, Science and Technology SATellite (FASTSAT) is 39.5 inches in diameter — not much larger than an exercise ball. It is hexagonally shaped and clocks in at a little less than 200 Lbs. It can carry a payload up to 110 Lbs. [...] NASA said FASTSAT is just the right size for earth observing missions, space science missions, and technology demonstrations. 'We think we can do whole missions for less than $10 million instead of the traditional $100s of millions, and that includes the launch vehicle, the satellite, and the widget you want to test,' said Marshall Space Flight Center's Edward 'Sandy' Montgomery in a release."
Earth has a magnetic field, and if you place another magnet in the field, oriented differently, a torque results. The torque is very low, so it takes a while to have a noticeable effect, but if all you're doing is pointing at the earth, it's sufficient.
Generally, you'll see the magnets either on the ends of long booms (for satellites intended to stay oriented in one direction) or as electromagnets (for more pointable spacecraft).
The meek may inherit the earth, but the strong shall take the stars.
There's a sentence in the article that doesn't make sense and I wanted to clarify it for those reading.
These dimensions place FASTSAT squarely in the microsatellite category where it will compete with such as SpaceX's Falcon 1 and Kistler's K-1, NASA said.
Except that SpaceX and Kistler both make ROCKETS not satellites. The competitors for FASTSAT would be companies like Surrey and Orbital Sciences.
However, (what I think the author probably meant to write) is that SpaceX's Falcon 1 (and Kistler's K-1 if it hadn't just been cut by NASA) would be great rockets to launch a small payload like this. Falcon 1 tops out at a few thousand pounds, so you could cheaply load a few of these into a rocket. For $7million for the rocket and a few million more for each satellite you could send up several serious NASA missions.