The Spacious Structure of Asteroid 2011 MD Artist Concept

Illustrated in this artist concept are two possible structures for asteroid 2011 MD. NASA Spitzer infrared camera helped reveal that this asteroid consists of about two-thirds empty space.

Illustrated in this artist concept are two possible structures for asteroid 2011 MD. NASA Spitzer infrared camera helped reveal that this asteroid consists of about two-thirds empty space.

AsteroidSpitzer Space Telescope