Space exploration and science could take a serious hit as funding is slashed by 24% under Trump's proposed budget.

The International Space Station is facing a $1 billion budget shortfall – separate from President Donald Trump's plans to further cut funding – that will require dropping the number of NASA astronauts on the orbiting platform.

The European Space Agency said on Monday it was studying the impact of U.S. budget proposals that include cuts to NASA moon programmes in which it has a role, and said it remained open to cooperation with the U.