Explore Space Missions
![](/images/icons/mission_exploration.jpg)
For as long as there have been people on Earth, we have looked up at the sky and wondered ...
Read more
![](/images/icons/mission_human.jpg)
It was not long after the first space satellites were launched that we succeeded in getting ...
Read more
![](/images/icons/mission_unmanned.jpg)
Satellites and robotic spacecraft are crucial to space exploration. They let us explore space ...
Read more
![](/images/icons/mission_links.jpg)
These are links to other great web sites about Space Missions. But beware: you don't want ...
Read more
![](/images/icons/mission_tours.jpg)
Take off on an Exploratour! Click on one of the many tours listed below to follow a guided ...
Read more
Did you know?
What do
White Dwarfs and
Black Holes have in common? Find out in our
Strange Stuff in Space section!
Did you know that different cultures imagined different constellations, based on their own cultural context?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
EpicenterxEpicenter : The epicenter is the point on the earth's surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins.
Click on the word to find out!
Research Highlights
The Earth's mantle is a rocky, solid shell that is between the Earth's crust and the outer core, and makes up about 84 percent of the Earth's volume. The mantle is made up of many distinct portions or...
Read more![](/olpa/images/baffin_mantle_small.jpg)