What names of communication object that circles the earth?

Is the Earth 4 times bigger than the Moon in terms of size and mass? Which US astronaut was the first American to walk in space and died in a fire in 1967? What planet orbit around the sun is most nearly circular? How long has Earth been around? How often does mid tides occur? Which has the greatest effect the sun or the moon? What did River Song whisper in Doctor whos ear? Is there a star by Orions belt you can see with the naked eye whose light left there 4.5 to6 million years ago? Is the moon electromagnetic? What is the function of a solar geyser? What theory states that the moon formed when a planet sized object collided with earth? What day is January 30th 1958? Who went into space first? When will the next alignment of all eight planets plus Pluto occur? Why did Nasa start the Apollo missions? When objects are in orbit what forces hold it there? What time of the year can the Big Dipper be seen from Danang Vietnam? What force sends a rocket to space? How do you thank teachers for helping organize an event? Why isn't a comet considered a planet?