Even with the JWST, however, finding extrasolar 'Earths' will be tough.

即便使用JWST，寻找太阳系之外的“地球”依然不是轻而易举的事儿。

youdao

By looping around L2, JWST can keep its shield pointed at the sun while avoiding the shadow of Earth and the moon.

由于詹姆斯·韦伯太空望远镜在围绕L2运行，因此可以使其遮阳板对着太阳，同时又避开了来自地球和月球的阴影。

youdao

The James Webb Space Telescope (JWST) will be a giant-its multilayered sun shield stretches 22 meters, nearly twice the length of the Hubble Space Telescope.

詹姆斯·韦伯太空望远镜(JWST)体态硕大无比- - -其多层遮阳板的长度将达22米，几乎是哈勃太空望远镜的两倍。

youdao

But, among other things, he says these new Hubble Frontier Fields should set the groundwork for JWST.

FORBES: Hubble Astronomers Ready Ambitious 'Deep Field' Encore

Then there's the replacement for Hubble, the James Webb Space Telescope (JWST), which has been very expensive with lots of cost overruns, and now this asteroid mission.

BBC: Is Nasa looking in the wrong place for life?

The next stage is a new infrared space telescope -- the James Webb Space Telescope (JWST) -- to replace Hubble, currently due to be launched in 2013.

CNN: Telescope set to reveal 'Big Bang'