UNIVERSE

Anmerkungen:

• The Earth is at the centre of the Universe. Aristotle Claudius Ptolemy

Anmerkungen:

• The Sun is at the centre of the Universe. Copernicus Galileo Kepler

Anmerkungen:

• AU: is equal to the distance between the Earth and the Sun. 150 000 000 km. Distances between planets are expresed in UA

Anmerkungen:

• ly: is the distance that light travels in a year. Galactic dimensions are expresed in ly.

Anmerkungen:

• 3,26 años luz

Anmerkungen:

• Groups of stars, interstellar gas and dust. Contain trillions of stars. Form groups of galaxy clusters.

1. Local Group

   Anmerkungen:

   • Our galaxy, the Milky Way, is in the Local Group
2. Contains...
   1. Nebulae

      Anmerkungen:

      • Large clouds of dust and gas (hydrogen and helium). in outer space.
   2. Star Clusters

      Anmerkungen:

      • Composed of lots of stars that are very close to each other.
3. Milky Way

   Anmerkungen:

   • Contains hundred of billions of stars, including the sun. Diameter: 1000 000 yl
   1. Nucleus

      Anmerkungen:

      • Central bulge Old stars
   2. Disk

      Anmerkungen:

      • Spiral arms. Youngest stars Our Sun is in the Orion Arm
   3. Halo

      Anmerkungen:

      • Composed  of isolated stars and globular clusters

Anmerkungen:

• Hydrogen and helium Nuclear Fusion

1. The Sun

   Anmerkungen:

   • Diameter: 1 400 000 75% hydrogen 25% helium Surface 5500ºC Nucleus 15 000 000ºC Rotation anticlockwise 25/30 days
   1. Solar System
      1. Components
         1. Sun

            Anmerkungen:

            • Medium-Sized star  G-Type Emits light
         2. Planets
            1. Features
               1. Mercury

                  Anmerkungen:

                  • Closet planet  to the Sun Craters Slow rotation (59 Earth days) Doesn't have an atmosphere Temperatures vary widely No satellites Your weight 0.37 ...
               2. Venus

                  Anmerkungen:

                  • =density and size than Earth Atmosphere: CO2, clouds of suphuric acid Highest surface temperature in the solar system. 1 day last more than a Earth year. No satellites. Your weight: 0.88 ...
               3. Earth

                  Anmerkungen:

                  • diameter
                  1. Movements
                     1. Revolution
                     2. Rotation
                  2. The Moon
                     1. Lunar Phases
                     2. Eclipses
                        1. Solar
                        2. Lunar
                     3. Tides
               4. Mars
               5. Jupiter
               6. Saturn
               7. Uranus
               8. Neptune
         3. Dwarf Planets
            1. Features
               1. Pluto

                  Anmerkungen:

                  • Smaller than the Moon Three satellites (Charon) Your weight: 00.6 times your weight on Earth
               2. Ceres

                  Anmerkungen:

                  • Smallest dwarf planet In the asteroid belt Your weight 0.027 ...
               3. Eris

                  Anmerkungen:

                  • Bigger than Pluto Discovered in 2005 The farthest away
         4. Satellites
         5. Comets

            Anmerkungen:

            • Rocks, ice and dust
            1. Kuiper Belt

               Anmerkungen:

               • Short period comets. Halley's comet
            2. Oort Cloud

               Anmerkungen:

               • Long period comets
      2. Features

         Anmerkungen:

         • The orbit of all planets around the Sun (except Pluto)is on the same plane. Year. anticlockwise translation Day: anticlockwise rotation (except Venus and Uranus)
2. Properties
   1. Brightness

      Anmerkungen:

      • Depends on: distance energy released size
   2. Colour

      Anmerkungen:

      • depends on the surface temperature

Anmerkungen:

• -Abiertos -Globulares