Scientists (air traffic controllers) at airports use ___________________ technology to locate airplanes in the sky. Police can also use this to measure the speed of cars and trucks traveling on the highways.
A __________ ____________ is a type of technology used in dangerous space missions to study far away planets. These are valuable tools because they do not carry humans on these dangerous missions and this tool can actually collect surface samples.
The ___________ ____________ is a very expensive yet valuable telescope to study the planets. Because it is a space-based telescope, it can take pictures that are ten times (10X) clearer than Earth-based telescopes.