horizon

NASA - Phoenix Provides a Panorama of Mars

javaman's picture
Sat, 2008-08-02 15:05 - Topics:

Phoenix Provides a Panorama of MarsCombining more than 400 images taken during the first weeks after the Phoenix arrived on the Red planet's arctic plain gave scientists this view of Mars.The full-circle panorama in approximately true color shows the polygonal patterning of ground at the landing area, similar to patterns in permafrost areas on Earth. The center of the image is the westward part of the scene. Trenches where Phoenix's robotic arm has been exposing subsurface material are visible in the right half of the image.

Full story:
http://www.nasa.gov/multimedia/imagegallery/image_fe... 

How Far Away is the Horizon?

javaman's picture
Wed, 2008-07-30 08:59 - Topics:

On a clear day, you can see for miles and miles and miles.The old saying turns out to be just about true. For a six-foot tall person, the horizon is a little more than 3 miles (5 km) away.

Full story:
http://www.livescience.com/mysteries/080717-llm-hori... 
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