2Escape VelocityIn order to break free of gravity, spacecraft must travel at speeds greater than 11 km/s.
3Rockets Engines that have everything they need for burning fuel. 2 types:Liquid-propellant rocketCan be shut down after they are started.Can be restarted.Solid-propellant rocketCan’t be shut down after they are started.
5RocketsUse physics (opposing forces) to propel the rocket forward.
6Satellites Any object that revolves around another object. Satellites travel in curved paths called orbits (due to gravity).Sputnik I, launched by Russia in 1957, was the first artificial satellite.Modern satellites are used for communication, entertainment, and data collection.
8Space ProbesSent through the solar system to gather and transmit data.
9Space Probes Voyager Interstellar Mission Voyager I and Voyager II Launched in 1977.Voyager I flew past Jupiter and SaturnVoyager II flew past Jupiter, Saturn, Uranus, and Neptune.Expected to transmit data for another 20 years.
12Space Probes Pioneer 10 Launched in 1972 First probe to survive a trip through the asteroid belt and arrive at an outer planet.Carries a gold medallion of a man, a woman, and Earth’s position in the galaxy.
13Space Probes Galileo Launched in 1989 Released a smaller probe in 1995.The smaller probe approached Jupiter for 5 months and then parachuted through the atmosphere of Jupiter transmitting information to the satellite above it.Found that Europa may have an ocean and conditions for the possible existence of life.Found that Io has active volcanoes that erupt sulfur and oxygen.
14Race to the Moon1961 – Soviet cosmonaut, Yuri A. Gagarin, became the first human in space.Soon after, President Kennedy set a goal of putting a man on the moon by the end of the 60’s.
15Race to the Moon Project Mercury On May 5th, 1961 Alan B. Shepard became the first U.S. citizen in space.In 1962 John Glenn became the first U.S. citizen to orbit the Earth.
16Race to the Moon Project Gemini Teams of 2 astronauts orbited the Earth and met up with another spacecraft in orbit.Gemini spacecraft were launched by a rocket liquid-fuel rocket known as Titan II.Used to examine the effects of space travel on the human body.
17Race to the Moon Robotic moon probes Ranger Surveyor Lunar Orbiter Proved that spacecraft could be sent to the moon.SurveyorLanded gently on the moon in 1966.Lunar OrbiterTook pictures of the surface of the moon in order to determine the best landing spot.
18Race to the Moon Project Apollo Apollo 11 Landed on the moon on July 20th, 1969.Neil Armstrong was the first human to set foot on the moon.Made the statement, “That’s one small step for man, one giant leap for mankind.”Edwin Aldrin joined Armstrong and they explored the moon for 2 hours.Michael Collins remained in the Command Unit.A total of six lunar landings brought back more than 2,000 samples of rocks and lunar soil before the program ended in 1972.