September 12th, 2011
03:57 PM ET

GRAIL Heads to the Moon

"Fire and smoke light up a blue sky as a United Launch Alliance Delta II Heavy rocket propels NASA's Gravity Recovery and Interior Laboratory (GRAIL) mission into space. Liftoff from Space Launch Complex 17B on Cape Canaveral Air Force Station in Florida was at 9:08:52 EDT Sept.10.

The spacecraft are embarking on a three-month journey to reach the moon. GRAIL will fly twin spacecraft in tandem around the moon to precisely measure and map variations in the moon's gravitational field. The mission will provide the most accurate global gravity field to date for any planet, including Earth. This detailed information will reveal differences in the density of the moon's crust and mantle and will help answer fundamental questions about the moon's internal structure, thermal evolution, and history of collisions with asteroids. The aim is to map the moon's gravity field so completely that future moon vehicles can safely navigate anywhere on the moon's surface."

Source: NASA

Filed under: Light up the screen
soundoff (2 Responses)
  1. EVAN

    Ok this seems like were going backwards. Did we not already safely navigate our way to the moon and land in that gravity and safely navigate a vehicle on the surface or was this all bullshit

    September 14, 2011 at 3:22 pm |
  2. ajd041

    I'm first yay! And it seems interesting that they haven't done this for earth yet...

    September 12, 2011 at 10:38 pm |


  • Elizabeth Landau
  • Sophia Dengo
    Senior Designer