Search Results

Go to search Go to header Go to navigation Go to main content Go to footer

10 | 25 | 50 | 100 items per page

7,244 results

Image

Artist impression of TDRS-L, the 11th member of NASA's Tracking and Data Relay Satellite System, orbiting Earth at 36,000 km (22,300 mi). TDRS-L sends signals, information, and commands from ground controllers to the International Space Station and…

Image

from article Communications satellite

Communications to and from a satellite.

Image

from article Communications satellite

Typical communications satellite. TWTA = traveling-wave–tube amplifier. (Credit: Space Systems/Loral)

Image

from article Communications satellite

Orbit periods of circular orbits.

Image

from article Forest ecosystem

Forest in Moran State Park on Orcas Island, Washington. (Credit: Chris Willig)

Image

from article Forest ecosystem

Forest fire in No Name Creek area of Colorado. (Credit: Andrea Booher/FEMA)

Image

from article Forest ecosystem

Puma and cub in forest. (Credit: Grant Faint/Stockbyte/Getty Images)

Image

from article Forest ecosystem

Conceptual model of elemental cycling in a terrestial ecosystem, emphasizing the presence and activities of arthropod consumers. The indirect regulation of elemental movement by arthropods is indicated by the hourglass-shaped valves on these flows.…

Image

from article Forest ecosystem

The southern pine beetle (Dendroctonus frontalis) is a destructive insect pest of coniferous forests in the southern United States. (Credit: U.S. Forest Service)

Image

from article Forest ecosystem