Our Universe ;)

Our Universe ;)

1. Galaxy (Milky Way) - large collection of stars, gas and dust

   • Solar System: collection of large + small bodies that orbit the sub
     • Order of Planets: Mercury, Venus, Earth, Mars (terrestrial - rocky, dense, small) Jupiter, Saturn, Uranus, Neptune (gas giants - thick gaseous atmosphere + small rocky cores)
       • Planet: spherical body that orbits the sun
         • Moon: smaller orbiting bodies. Other small bodies: dwarf planets, comets, asteroids, and meteoroids.
           • orbit: path a body follows as it travels around another body
         • Planetesimals: meteor sized disk + dust granules = PLANETS!
     • Star: a large celestial body that is made of gas + emits light
   • Spiral Galaxy - pinwheels; center bulge w/ spiral
   • Irregular Galaxy - splotchy, irregular blobs; active areas of star formation.
   • Elliptical Galaxy - spheres/ ovals; no spiral arms

2. Light years: distance that light travels in one (1) year. (300,000 km/sec)

3. <-- Heliocentric Model (sun in center)

4. Geocentric Model (earth in center) -->

5. Gravity: force of attraction between objects due to mass and distance between them

6. Centripetal force: inward force that causes an object to stay in a circular path.

7. Aphelion- point furthest point from sun; Perehelion - closest to sun

8. Solar Nebula: from which the most of the Solar System formed.

9. Protostellar Disk: --> friction + intense

10. Rotation: body spinning on its axis

    • 30 km/s; the motion of a body that travels around another body in space = revolution

11. season: temperature + other weather changes; equinox: equal sun @ both hemispheres; solstice: maximum sunlight @ one hemisphere + min @ the other

Imagens e arquivos do mapa