Trunp's new policy could lead to the militarisation of outer space and the beginning of a new space arms race.
The Outer Space Treaty has guided global exploration and use of outer space since 1967. Trump's 'Space Force' may not be a good fit.
China's space station Tiangong-1 is about to crash back to Earth any day now. It's out of control too so no one really knows where it will land. So what if it hits you or your house?
No human has been to the moon since 1972. But India, China and Russia would like to change that, and soon.
Future Mars colonists may want to form their own legal system. What would stop them?
Who is responsible for space debris? What laws should apply to humans living on another planet? Who has rights to mine asteroids? The Outer Space Treaty needs an update to address such questions.
The Outer Space Treaty, now 50 years old, has so far never been violated. But things could be about to change.
The rules on armed conflict on Earth are a major source of restraint on military operations. But the rules on the use of weapons in outer space are far from clear. We need to change that.
It is unclear how regulated space activities by private companies really are.
We should welcome the fact that amateur astronomers are increasingly keeping tabs on what's going on up above.
The US has been beaming up free-market principles to outer space for decades. But the new Space Act is a step too far.
In our efforts to keep peace in space we could learn much from the US-Russian relationship on the International Space Station.
We're already building satellites that can sit in the palm of your hand. But getting them into orbit can be a challneg, and not only for technical reasons.