What field of science investigates ideas about a possible estraterrestrial?

What type of rocket was used to carry the astronauts to the moon? Describe a main idea of physical science that deals with space and time? Is Jupiter colder than Mars? How long is a day on the moon compared to a day on earth? To a large degree the blank has replaced photographic film for astronomical imaging What could it be? In what layer of the sun does fusion take place? Why does sun does not shines everywhere? What is the Only the mass of the planet and radius of the orbit are needed to calculate the orbital speed of a satellite.? How many miles is one parsec? What are three of the names of the robot explored Jupiter and what year? How does technoology help to ensure a scientist's data is accurate? I am the object in the solar system that can float in water if you find a bathtub big enough to hold me? How much did buzz Aldrin make when he went to the moon? What do astronauts bring to space? What word meaning large body that revolves around the sun do you connect with a place called a planetarium? Why does the name satellite given to the satellite? How often are radiosondes launched? How much does it cost to go to the international space station? What do the stars on the China flag mean? What is the part of speech sky?

What field of science investigates ideas about a possible estraterrestrial?