This body is the second densest in the solar system and has the greatest temperature variation in the solar system.  Its surface has "weird terrain", a region hypothesized to have been created by seismic convergence when an asteroid struck the surface creating the Caloris Basin. The MESSENGER mission will start orbiting it in 2011, but up till now only Mariner 10 has visit
This body is the second densest in the solar system and has the greatest temperature variation in the solar system.  Its surface has "weird terrain", a region hypothesized to have been created by seismic convergence when an asteroid struck the surface creating the Caloris Basin. The MESSENGER mission will start orbiting it in 2011, but up till now only Mariner 10 has visited it.  This planet also has the lowest albedo of any in the solar system.  FTP, name this planet nearest to the Sun.
This body is the second densest in the solar system and has the greatest temperature variation in the solar system.  
Mercury