He says the aim of the group is to influence people to care about our planet.

VOA: special.2009.05.29

Astronomers at Lowell and many other observatories continue to search for life beyond our planet.

VOA: special.2010.07.11

The aim of the festival is to educate people about environmental issues affecting our planet.

VOA: special.2009.03.25

Instead,these experts say, our planet is experiencing a normal series of temperature changes.

VOA: special.2010.01.19

Scientists explain that the surface of our planet is always in motion.

VOA: special.2010.01.12

Mars Day at the Smithsonian Air and Space Museum in Washington is a celebration of our solar system's most famous planet.

VOA: special.2010.07.28

But he says understanding these differences can help discover how some complex processes on our own planet really work.

VOA: special.2009.12.30

This most recent collision with Jupiter brought attention to how the huge planet's gravity affects our solar system.

VOA: special.2009.08.25

"We initially were rather concerned as how our parents would react, as we came from different religions, different backgrounds, two different parts of the planet.

VOA: special.2011.05.09

" planets like our own planet formed. So star formation is a very big thing for Herschel."

VOA: standard.2009.05.14

Author,educator and environmental activist Bill McKibben offers some advice in his new book on how to live on what he calls our "tough new planet."

VOA: standard.2010.04.21

"The important achievement of Apollo was a demonstration that humanity is not forever chained to this planet, and our visions go rather further than that and our opportunities are unlimited,".

VOA: standard.2009.07.16

"The planet on which our civilization evolved no longer exists."

VOA: standard.2010.04.21

Writer-director Cameron also acknowledges that what the humans try to do on the fictional Pandora is a clear metaphor for what he believes are the dangers of exploitation on our own planet;

VOA: standard.2009.12.19

"The bulk of our food production on this planet is dependent to some extent or another on oil or products of oil, so this goes right to the heart of,frankly, the way our society functions,"

VOA: standard.2009.10.20