Future of US space travel uncertain
A White House panel of independent space experts has raised serious doubts about NASA's plan to revisit the Moon, or to send astronauts to Mars.
It says the current annual budget of $18 bn is simply not enough to fund exploration beyond the Earth.
Five years ago President Bush set out his lofty vision of sending astronauts back to the Moon by the year 2020. It was meant to be the staging post for the next frontier - a manned landing on Mars. Now a panel of space experts says that's pretty much pie in the sky.
Their report, commissioned by President Obama, says the current US human spaceflight programme appears to be on an unsustainable trajectory. It suggests the only way forward is to increase the funding of NASA by billions of dollars, or to co-operate with private companies now embarking on commercial space flights.
The panel says visits to Near-Earth Objects such as asteroids are far more realistic too. The experts also argue for keeping the International Space Station going till 2020, rather than pulling the plug in six years' time.
Jonathan Beale, BBC News, Washington
sergilemek, düzenlemek, ortaya koymak
iddialı bir plan, hedefler
mola yeri, durak, burada Mars'a giderken Ay'da mola kastediliyor
uzayın keşfedilmeyen yeri
panel, karar alan bir grup profesyonel ya da uzman insan
pie in the sky
gerçekleşmesi ihtimali düşük olan şey anlamına gelen bir ifade
on an unsustainable trajectory
sürdürülebilirliği olmayan bir plan izlemek
yeni bir işe koyulmak
pulling the plug
fişini çekmek, bir şeyin devam etmesini önlemek