Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Sample-return mission wikipedia , lookup
Earth's rotation wikipedia , lookup
Heliosphere wikipedia , lookup
Definition of planet wikipedia , lookup
Space: 1889 wikipedia , lookup
Standard solar model wikipedia , lookup
Planets in astrology wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
The Solar System, Planets and Small Celestial Bodies Big Bang Theory • Scientific theory of the origin of the universe • 10-15 billion years ago all matter came together to one point • Due to density and high temperature a huge explosion (big bang) occurred • Since the beginning universe has been expanding • Galaxies moving away from each other Evidence for the Big Bang • Red Shift – Light shifting towards the red (longer wavelengths) end of the spectrum – Wavelengths getting longer – Galaxy moving away from center of the universe – Scientists use this as evidence that the big bang occured Models of the Solar System • Geocentric – model that places Earth in the middle of the solar system • Heliocentric – model that places Sun in the center of the solar system Terrestrial Planets • Four small, dense, rocky planets that orbit closest to the Sun – Mercury – Venus – Earth – Mars Gas Giants • Have deep, massive gas atmospheres, which are made up of mostly hydrogen and helium • Become denser as you travel inside • Small rocky cores • Jupiter, Saturn, Uranus and Neptune Dwarf Planets • Celestial bodies that orbit the sun and range in size from 1500km to 2400km Comet • A small body of ice, rock and dust that follows a highly elliptical orbit • Close to the sun ice melts and creates a tail • Dirty snowball Oort Cloud • Spherical region that surrounds the solar system and extends half way to the nearest star Asteroid • A small irregularly shaped rocky object that orbits the sun • The Asteroid Belt is between Mars and Jupiter Meteoroid – a sand grain-to boulder size rocky body traveling through space Meteor – the rocky body enters Earth’s atmosphere and is burned in the mesosphere Meteorite – the rock body hits Earth’s surface