1. Light from Stars
When you see the light from a star, it is light that left it many years ago.
Light travels very fast, but the distances in space are so great that it takes years for the light to reach Earth.-sometimes tens of thousands of years.
The light and other energy leaving a star are forms of radiation.

2. Radiation
Remember: radiation is energy transmitted through electromagnetic waves.
Because of electric and magnetic properties of this energy, it is called electromagnetic radiation.
Electromagnetic waves carry energy through both empty space and matter.

3. How do we hear astronauts in space?
Sound waves are mechanical waves; they can’t travel through space
So, how do we hear astronauts in space?

4. How do we hear astronauts in space?
When they speak into a microphone, the sound is converted into electromagnetic waves called radio waves. The radio waves travel through space and back to Earth where they are converted back into sound.

5. Electromagnetic Spectrum
All electromagnetic waves have different wavelengths, but the all travel at the speed of light in a vacuum- 300,000 km/s in a vacuum

6. Satellites
A satellite is any object that revolves around another object.

7. Satellites
When an object enters space, it will travel in a straight line until the Earth’s gravity pulls it back toward Earth.
Because the satellite is traveling forward and falling toward Earth at the same time, the satellite will travel in a curved path around Earth known as an orbit.

8. 2 Types of Satellites- Natural & Artificial
There are both natural and artificial satellites.

9. Natural Satellites The moon is a natural satellite.
It orbits the Earth.

10. Sputnik- 1st Artificial Satellite

11. Sputnik 1
Sputnik was launched by the Soviets in 1957, marking the beginning of space exploration.

12. Space Probes
A space probe is an instrument that gathers information and sends it back to Earth. Space probes travel far into space.
Examples: Voyager I and II (didn’t land on a planet), Viking (did land), Galileo (dropped probe onto Jupiter)

13. Space Program & Important People
Yuri Gagarin
&
President Kennedy

14. Yuri Gagarin
In 1961, Yuri Gagarin became the first human in space.

15. President Kennedy
President Kennedy called for the US to put the first man on the moon by the end of the decade.

16. Projects that led to man on the moon
Project Mercury
Project Gemini
Project Apollo

17. Project Mercury
Project Mercury- orbit a crewed spacecraft around Earth and bring it back safely

18. Alan Shepard 1961- Alan Shepard became 1st US citizen in space
Was not on Apollo 13 because of an ear infection
Apollo 14-oldest man on moon (47)
Hit golf balls on moon

19. John Glenn
1962- John Glenn became the 1st US citizen to orbit the Earth

20. Project Gemini
Project Gemini- two teams of astronauts met and connected

21. Project Gemini

22. Project Apollo
Project Apollo- July 20, 1969 Apollo 11 landed on the moon
Saturn V that launched Apollo 11

23. Project Apollo
Neil Armstrong was the first man to walk on the man.

24. Neil Armstrong
“That’s one step for a man, one giant leap for mankind.”

25. Apollo 11- Edwin Aldrin
Edwin Aldrin was the 2nd man to walk on the moon. He and Armstrong explored for 2 hours.

26. Apollo 11- Michael Collins
Michael Collins remained in the Command Module.
A total of 6 lunar landings brought back 2000 samples of moon rock. The program ended in 1972.

27. Space Shuttle
A space shuttle is a reusable spacecraft that transports astronauts, satellites, and other materials to and from space.

28. Space Shuttle
At launch, the space shuttle orbiter stands on end and is connected to an external liquid-fuel tank and two solid-fuel booster engines.

29. Space Shuttle
When the shuttle reaches an altitude of about 45 km, the emptied solid-fuel booster rockets drop off and parachute back to earth. They are recovered and reused again.

30. Space Shuttle
The larger liquid fuel tank eventually separates and falls back to Earth. It is not recovered.

31. Space Shuttle
Once the space shuttle reaches space, it orbits Earth.

32. Space Shuttle Landing
At the end of a mission, the space shuttle orbiter glides back to Earth and lands like an airplane. The parachute slows it down.

33. Space Shuttle Challenger Disaster
January 28, 1986
7 crew members died- one of which was teacher Christina McAuliffe
Mc Auliffe was first member of the Teachers in Space Program

34. Challenger

35. Space Stations
A space station has living quarters, work and exercise space, and all the equipment and support systems needed to live and work in space.

36. Skylab
Skylab was a space station put up in In 1979 it was abandoned and fell back into earth’s atmosphere and burned up

37. Skylab Launch

38. Skylab Launch

39. Mir
Mir was a Soviet space station.

40. International Space Station
International Space Station serves as a research lab for several countries.
Permanent crew
Scientists on Earth have almost instant access to experiments and can modify when needed