NASA plans to land on an asteroid next week.
The space agency hopes the unmanned spacecraft will grab some rocks and dust to bring back for research.
The spacecraft started orbiting the asteroid about two years ago to determine the best place to land.
The asteroid interests scientists because they believe it was made from a cosmic collision a long time ago.
They want to see if it contains any material that could indicate signs of life or give a hint into the history of the solar system.