Preposition #1: Before this launch, the Soviet Union built a satellite named Sputnik. (1)

Object of a Preposition #1: Before this launch, the Soviet Union built a satellite named Sputnik. (1)

Preposition #1: It circled Earth in 1957. (1)

Object of a Preposition #1: It circled Earth in 1957. (1)

Preposition #1: Sputnik weighed only 184 pounds and fell to Earth within three months. (1)

Object of a Preposition #1: Sputnik weighed only 184 pounds and fell to Earth within three months. (1)

Preposition #2: Sputnik weighed only 184 pounds and fell to Earth within three months. (1)

Object of a Preposition #2: Sputnik weighed only 184 pounds and fell to Earth within three months. (1)

Preposition #1: The Russians launched Sputnik II on November 3, 1957. (1)

Object of a Preposition #1: The Russians launched Sputnik II on November 3, 1957. (3)

Preposition #1: A dog was along for the ride. (1)

Object of a Preposition #1: A dog was along for the ride. (1)

Preposition #1: The scientists wanted to see how long it would live in space. (1)

Object of a Preposition #1: The scientists wanted to see how long it would live in space. (1)

Preposition #1: It lived one hundred hours after takeoff. (1)

Object of a Preposition #1: It lived one hundred hours after takeoff. (1)

Preposition #1: The 1960 Tiros I demonstrated a satellite’s value in weather forecasting. (1)

Object of a Preposition #1: The 1960 Tiros I demonstrated a satellite’s value in weather forecasting. (1)

Preposition #1: The year 1960 also saw the Soviet Discoverer capsules tested for passengers. (1)

Object of a Preposition #1: The year 1960 also saw the Soviet Discoverer capsules tested for passengers. (1)

Preposition #1: The Russians developed space capsules intended for human use, too. (1)

Object of a Preposition #1: The Russians developed space capsules intended for human use, too. (1)

Preposition #1: The first man in space was Yuri A. Gagarin. (1)

Object of a Preposition #1: The first man in space was Yuri A. Gagarin. (1)

Preposition #1: He made a single orbit around Earth. (1)

Object of a Preposition #1: He made a single orbit around Earth. (1)

Preposition #1: According to records, the date was April 12, 1961. (2)

Object of a Preposition #1: According to records, the date was April 12, 1961. (1)

Preposition #1: Gagarin was two hundred miles above Earth. (1)

Object of a Preposition #1: Gagarin was two hundred miles above Earth. (1)

Preposition #1: The American project Mercury was initiated in 1958. (1)

Object of a Preposition #1: The American project Mercury was initiated in 1958. (1)

Preposition #1: It was under the control of the National Aeronautics and Space Administration. (1)

Object of a Preposition #1: It was under the control of the National Aeronautics and Space Administration. (1)

Preposition #2: It was under the control of the National Aeronautics and Space Administration. (1)

Object of a Preposition #2: It was under the control of the National Aeronautics and Space Administration. (5)

Preposition #1: In May of 1961, Alan B. Shepard Jr. went into space. (1)

Object of a Preposition #1: In May of 1961, Alan B. Shepard Jr. went into space. (1)

Preposition #2: In May of 1961, Alan B. Shepard Jr. went into space. (1)

Object of a Preposition #2: In May of 1961, Alan B. Shepard Jr. went into space. (1)

Preposition #3: In May of 1961, Alan B. Shepard Jr. went into space. (1)

Object of a Preposition #3: In May of 1961, Alan B. Shepard Jr. went into space. (1)

Preposition #1: Shepard, the first American in space, spent fifteen minutes there. (1)

Object of a Preposition #1: Shepard, the first American in space, spent fifteen minutes there. (1)

Preposition #1: Two months after Shepard, Virgil I. Grissom became the second American to travel outside Earth’s atmosphere and protective shield. (1)

Object of a Preposition #1: Two months after Shepard, Virgil I. Grissom became the second American to travel outside Earth’s atmosphere and protective shield. (1)

Object of a Preposition #2: Two months after Shepard, Virgil I. Grissom became the second American to travel outside Earth’s atmosphere and protective shield. (1)

Preposition #1: Grissom’s Mercury flight was like Shepard’s suborbital flight. (1)

Object of a Preposition #1: Grissom’s Mercury flight was like Shepard’s suborbital flight. (1)

Preposition #1: The first of the American astronauts in orbit around Earth was John H. Glenn. (1)

Object of a Preposition #1: The first of the American astronauts in orbit around Earth was John H. Glenn. (1)

Preposition #2: The first of the American astronauts in orbit around Earth was John H. Glenn. (1)

Object of a Preposition #2: The first of the American astronauts in orbit around Earth was John H. Glenn. (1)

Preposition #3: The first of the American astronauts in orbit around Earth was John H. Glenn. (1)

Object of a Preposition #3: The first of the American astronauts in orbit around Earth was John H. Glenn. (1)