Where the solid (or liquid) material of the outer crust on certain types of astronomical objects contacts the atmosphere or outer space.
1He could see only a very small fraction of the planet's surface.
2However, the reshaping of the planet's surface varies geographically and varies through time.
3It would not take long, once they could focus on the planet's surface.
4On we sped in our wild career over the planet's surface.
5As a result, we had only seen 45% of the planet's surface.
6It also needs to be hardened to the solar radiation on the planet's surface.
7These orbiters showed that much of the planet's surface is older than scientists thought.
8This meant they were orbiting at distance where water could exist on a planet's surface.
9Unimaginably far away is a comparable weight even now descending inwards towards the planet's surface.
10Now imagine dipping the bucket at different depths, over 70 percent of the planet's surface.
11Then he whispered a command and the ships dropped like rocks toward the planet's surface.
12Based on the number of craters, planetary scientists gauge the age of a planet's surface features.
13Find some other way to get the crew members from the ship to a planet's surface.
14And let me remind you that mankind inhabits less than one percent of the planet's surface.
15From there they descended to the planet's surface.
16The view tank's image of Pluto expanded as did the gray-black contrasts of the planet's surface.
Translations for planet's surface