<p>Cancun, <a href="http://travel.nationalgeographic.com/travel/countries/mexico-guide/">Mexico</a> and the thriving city that's grown out of what was once a sleepy fishing town look much different when seen by a <a href="https://asterweb.jpl.nasa.gov/">satellite instrument</a> that watches for thermal generation and reflection. This picture shows surface temperature and elevation.</p>

Mapping Change

Cancun, Mexico and the thriving city that's grown out of what was once a sleepy fishing town look much different when seen by a satellite instrument that watches for thermal generation and reflection. This picture shows surface temperature and elevation.

Photograph by NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team

Week’s Best Space Pictures: Mars' Ancient River System

A glacier oozes in Alaska and clouds swirl into vortices in the southern Indian Ocean.

Feed your need for heavenly views of the universe with our pick of the most awe-inspiring space pictures. This week, light travels for 8.5 billion years and we glimpse a changing Cancun from on high.

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