Exploring Space
Chapter 21
Radiation from Space
Section 21.1
Describe the Electromagnetic Spectrum.
Describe the Electromagnetic Spectrum.
Radiation
Speed = 300,000 km/s
Takes 8.3 minutes for light to travel from sun
4 years for light to travel from nearest star
Describe the Electromagnetic Spectrum.(cont.)
Gamma rays 10-23 meters long
Radio waves 105 meters long
Visible light 10-7 to 10-6 meters long
Infrared - long
Ultraviolet short
ROYGBIV
Looking into the night sky is looking into the past. Carl
Sagan
What does this mean?
Give three types of telescopes.
Give three types of telescopes.
Optical Telescopes
Refracting Convex lens
Reflecting Concave mirror
Light Pollution
Section 21.2
What causes light pollution?
What causes light pollution?
City lights
Can not see as many stars in the sky.
How can light pollution be reduced?
How can light pollution be reduced?
Low pressure sodium lamps
Which of the following rights are more important to you?
The right to have security lighting
The right to a dark sky for observation
Artificial Satellites and Space Probes
Section 21.3
What is a satellite?
What is a satellite?
Object that revolves around another object
What was the first artificial satellite?
What was the first artificial satellite?
Sputnik I - Russian
List some space probes.
List some space probes.
1962 Mariner 2 Venus
1972 Pioneer 10 Jupiter
1975 Viking I Mars landing
1990 Magellan - Venus
Who was the first person in space?
Who was the first person in space?
Yuri A Gagarin Russian - 1961
Who was the first American in Space?
Who was the first American in Space?
Alan B. Shepard May 5, 1961
Who was the first U.S. citizen to orbit Earth?
Who was the first U.S. citizen to orbit Earth?
John Glenn - 1962
What was the Mercury Project?
What was the Mercury Project?
One man vehicles
What was the Gemini Project?
What was the Gemini Project?
2 man vehicles
Practice docking
What were some other projects?
What were some other projects?
Ranger could we get a spacecraft to the moon
Surveyor could we land on the moon
Lunar Orbiter take picture of moon, map moon, select landing site.
What was the Apollo Project?
What was the Apollo Project?
Land a man on the moon
Who was the first man on the moon?
Who was the first man on the moon?
July 20, 1969 Apollo 11
Neil Armstrong "Thats one small step for a man, one giant leap for mankind."
Edwin Aldrin with Armstrong
Michael Collins remained in Command Module orbiting the moon
When was the last moon mission?
When was the last moon mission?
1972
The Space Shuttle and the Future
Section 21.4
How is the Space Shuttle different from other spacecraft?
How is the Space Shuttle different from other spacecraft?
Reusable
Cargo bay
Mechanical arm
Land similar to an airplane
Give some space stations.
Give some space stations.
Space station permanent or semi-permanent vehicle
Skylab 1973 1979
Mir Russian
International Space Station
