The defunct NASA satellite that has been slowly falling back to Earth is expected to hit Friday.

The 6.5 ton bird operated for 14 years collecting measurements on various chemicals in our atmosphere.

NASA expects up to 26 pieces with a combined mass of 1,100 pounds should find its way to the ground.  NASA says the chance that you may be hit with falling debris is one in 3,200.

For more see this source article.