Astronomers use the observatory to study the positions and movements of the Earth, sun,moon and other objects in space.

VOA: special.2009.09.21

He says that skyscrapers are clearly popular around the world because they provide a huge amount of shelter and use less land space.

VOA: special.2010.03.31

NASA scientists had tried to solve the problem by designing new tools for use in space.

VOA: special.2009.06.24

We asked Phil Sumrall how NASA expects to use Ares in its space exploration plans.

VOA: special.2009.12.30

And that's what they're up to - trying to use the rationale of a legitimate space launch for a missile, which is in its foundation a military missile,".

VOA: standard.2009.03.26

"It is really pollution from our own use of space. Over the last 50 years we have been a bit careless, just as we have been careless with our oceans and rivers over centuries and polluted them.

VOA: standard.2010.07.24