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?
Do you know what a
circumpolar constellation is?
Do you know how the Doppler Effect works?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
AllotropesxAllotropes : Forms of an element with different structures and properties when they are in the same state - solid, liquid, gas
Click on the word to find out!
Research Highlights
A new study shows that water might have been present very early in the formation of Earth. Before this new information, scientists thought water came to Earth from comets. Scientists have learned this...
Read more![](/olpa/early_water_small.jpg)