A giant impact: Solving the mystery of how Mars' moons formed

Where did the two natural satellites of Mars, Phobos and Deimos, come from? For a long time, their shape suggested that they were asteroids captured by Mars. However, the shape and course of their orbits contradict this hypothesis. ...

Research team casts light on asteroid deflection

So you think global warming is a big problem? What could happen if a 25-million-ton chunk of rock slammed into Earth? When something similar happened 65 million years ago, the dinosaurs and other forms of life were wiped ...

Could plasma jet thrusters 'kickstart' interplanetary travel?

A great offshoot from commercial space companies getting a foothold in real missions to orbit is that the old entrepreneurial space spirit seems to have been revived. People are attempting to develop and build what could ...

Giant nets could remove orbiting space junk

A dozen space vehicles, equipped with 200 nets each, could scoop up the space debris floating in low Earth orbit, clearing the way for a future space elevator. That’s the idea described last Friday at the annual Space Elevator ...

Space tractor beams may not be the stuff of sci-fi for long

On Feb. 10, 2009, disaster struck hundreds of miles above the Siberian Peninsula. That evening, a defunct Russian satellite orbiting Earth crashed into a communications satellite called Iridium 33 moving at a speed of thousands ...

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