• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Ch 22 2
 

Ch 22 2

on

  • 1,068 views

 

Statistics

Views

Total Views
1,068
Views on SlideShare
1,044
Embed Views
24

Actions

Likes
0
Downloads
24
Comments
0

1 Embed 24

http://mms.amherst.k12.va.us 24

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Ch 22 2 Ch 22 2 Presentation Transcript

    • Chapter 22 Exploring Space
    • Electromagnetic Radiation
      • What is it ???
        • Radio waves
        • Visible light
        • Gamma rays
        • X-rays
        • Ultraviolet light
        • Infrared waves
        • Microwaves
    • Electromagnetic Spectrum
    • Frequency
      • Forms of electromagnetic radiation differ in their frequencies.
      • Frequency : # of wave crests that pass a given point per unit of time.
      • The shorter the wavelength, the higher the frequency.
    • Speed of Light
      • 300,000 km/s
      • ALL electromagnetic waves travel at this speed in a vacuum (where there is no matter)
    • First to Use a Telescope to Study the Sky
      • Galileo in 1600’s
    • Optical Telescope
      • Use light to produce magnified images.
        • Refracting telescope: convex lenses
        • Reflecting telescope: concave mirror.
    • Observatory
      • Where optical telescopes are located.
    • Edwin P. Hubble Discovered: Universe is Expanding Hubble Space Telescope named after him.
    • Hubble Space Telescope
      • Located outside Earth’s atmosphere
    • Hubble Telescope
    • Hubble Pictures
    •  
    •  
    •  
    •  
    •  
    • Radio Telescope
      • Studies radio waves that travel through space.
      • Useful 24 hours
      • a day.
    • Early Space Missions
      • Allowed astronomers to study space in ways not possible using telescopes.
      • Made possible by rockets.
    • Satellite
      • Any object that
      • revolves around
      • another object
      • in an orbit
      • In 1957 the former
      • Soviet Union
      • launched first artificial
      • satellite: Sputnik I.
    • Satellites Today
      • Thousands of artificial satellites orbit Earth
      • Used for: communication and weather forecasting.
    • Space Probes
      • Do not orbit Earth
      • Travel through space.
    • Space Probes: Pioneer 10
      • Launched 1972
      • 1 st manmade object
      • to travel through
      • asteroid belt.
      • Transmitter
      • failed in 2003
      • Passed Pluto
    • Space Probes: Voyager I & II
      • Launched by U.S. in 1977
      • Expected to collect data until 2020
    • Saturn Taken by Voyager II 1981
    • Images from Voyager Space Probes Voyager 2: 1981 Rings of Saturn
    • Images from Voyager Space Probes - Voyager 2 - 1989 - Neptune
    • Voyager 1990
      • By 1990, Voyager 1 was farther from the Sun than Pluto, and approximately 4 billion miles from the Earth. Thus, NASA gave Voyager 1 one last assignment and had the craft take the first ever pictures of the planets from “outside” the solar system. This is a compilation of those shots.
    • Images from Voyager Space Probes
    • Space Probe: Galileo
      • Launched in 1989
      • Reached Jupiter in 1995
      • Released smaller probe to approach Jupiter.
      • Studied Europa and Io (Jupiter’s moons)
    • Moon Quest
      • Yuri Gagarin: 1 st man in space (Soviet)
      • Project Mercury: began U.S. mission to put a man in space.
      • 1961: Alan Shepard: 1 st U.S. man in space
      • 1962: John Glenn: 1 st U.S. citizen to orbit Earth
    • Men in Space Yuri Gagarin 1 st man to orbit Earth
    • Men in Space Alan Shepherd John Glenn
    • Project Gemini
      • Teams of 2 astronauts in the same Gemini spacecraft orbited Earth. One Gemini team met and connected with another spacecraft in orbit.
    • Robotic Probes Sent to the Moon
      • Ranger
      • Surveyor: landed on moon in 1966
      • Lunar Orbiter: took pictures of moon’s surface
    • Project Apollo
      • 1969: Apollo II landed on the Moon
      • Neil Armstrong: 1 st person to step on Moon
    • Space Stations
      • 1973: U.S. launched Skylab
        • Fell out of orbit in 1979
    • Space Stations
      • Mir
        • Soviet Union
        • Dr. Valery Polyakov spent 438 days in space studying the long-term effects of weightlessness.
    • International Space Station
      • Effort of 16 nations
      • 3 phases
      • Should be completed by 2006
    • Missions to Mars
      • Mars Global Surveyor: orbited Mars and took pictures.
      • Pathfinder: descended to surface of Mars
      • Mars Odyssey: mapping surface of Mars
      • Spirit and Opportunity: rovers launched in 2003: goal to analyze surface of mars
      • Future plans: Phoenix 2008
    • Cassini
      • Launched 1997
      • Destination: Saturn