1 / 16

Discovering the Mysteries of Astronomy

Explore the history of astronomy, from Galileo's discoveries to the structure of the solar system and beyond. Learn about the planets, the sun, comets, and asteroids, and the forces that keep them in orbit. Delve into the fascinating world of celestial bodies and their characteristics.

leonora-karis
Télécharger la présentation

Discovering the Mysteries of Astronomy

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ASTRONOMY REVIEWSESSION

  2. Galileo • proved the sun was the center of the solar system (heliocentric) • used a telescope • phases of Venus: proved that Earth can NOT be in center because if it was then we’d see all of Venus all the time • moons of Jupiter: proved not everything revolves around Earth

  3. Aristotle • introduced the idea of elliptical orbits in geocentric theory

  4. Copernicus • 1st astronomer to name the sun as the center of the solar system

  5. Hershel • Invented the reflecting telescope • discovered Uranus

  6. Kepler • Heliocentric theory with elliptical orbits • wrote 3 laws of planetary motion

  7. Newton • explained gravity • wrote Principia

  8. Solar System • smaller systems within a system (planets & moons) • formed from a nebula /sun took 99% of matter • inner planets are rocky because when sun was forming its heat / energy pushed lighter particles away but the heavier ones stayed closer  became inner planets • outer planets are gas becausethe lighter particles pushed further out  became outer gas giants

  9. Two forces that keep planets balanced in orbit: • gravity: sun’s gravity pulls planets in • inertia: planet’s inertia pulls planets in straight line

  10. Two forces that keep planets balanced in orbit: • if one force is missing, then: • gravity: inertia would pull planet out of straight line • inertia: gravity would pull planet towards the sun

  11. head Comets • ball of ice & dust with long, stretched elliptical orbit • always points awayfrom sun • solar winds push tail away

  12. Meteors • meteor • meteorite • meteoroid pieces of comets & asteroids

  13. asteroids • Small and numerous • between Mars and Jupiter • May have been a planet that was destroyed somehow OR • Never formed into a planet because Jupiter’s gravity kept pulling the pieces apart

  14. Sun • 5 billion yrs old; lives for 10 billion yrs • medium/average size • sunspot—cooler / dark /surface / 11 yr cycle • prominence—loops of gas connecting sunspot regions • flare—prominences collide / explosion of gas & radiation • nuclear fusion in core turns hydrogen  helium; releasing heat & light

  15. Parts of the sun • Corona • Outer halo • Usually not seen because photosphere is so bright • Core • Nuclear fusion • Hydrogen fuses into helium • Energy released • chromosphere • Middle layer • reddish • Usually seen at beginning or end of eclipse • Photoshpere • Surface/inner layer • Produces the light • Seen in a picture

  16. Planets • Know the descriptive features/characteristics of each planet • EXAMPLES: • Tilted on its side, blue, discovered by Hershel = ?? • Uranus • Red, seasons, ice at poles, 2 moons = ?? • Mars

More Related