Chapter 20- The Solar System Flashcards
People first started observing space
In ancient times, Greeks
Planets mean
Wanderers
Greeks first thought that the earth
Was epicenter of solar system
Geocentric
When things revolve around earth
Ptolemy
Created model of geocentric system
Heliocentric
When earth and other planets revolve around the sun
Copernicus
Figured out the arrangement of planets and how they revolve around the sun
Galileo
Invented the teliscope
Tycho Brahe
Figured out all planets orbits are an oval, an ellipse
Suns interior
Core, radiation zone, convection zone
The sun is mostly made of
Hydrogen helium
Core
Produces energy from nuclear fusion, when hydrogen atoms join fpto form helium
Radiation zone
Layer of tightly packed gas where energy is transfers by electromagnetic radiation
Convection zone
Outer most layer with convection currents
Suns atmosphere
Photosphere, chromosphere, corona
Photosphere
Gives off light
Chromosphere
Gives off orange color
Corona
White halo around sun
Solar winds
Electrically charged particles in the corona
Sunspots
Areas on the sun that are cooler than the area around it
Prominences
Groups of sunspots
Solar flares
Eruptions
Inner planets also called
Terrestrial planets
Earth is mostly made of
Water
Mercury
Smallest, closest to the sun, no atmosphere
Venus
Earths twin, has greenhouse effect
Mars
Red planet, May had water, has seasons
Outer planets also called
Gas giants
Each gas giant has
Rings
Jupiter
Biggest planet, thick atmosphere, has Great Red Spot
Saturn
Most rings, second largest planet
Uranus
On its side, blue green
Neptune
Cold and blue, twin of Uranus, has invisible clouds
Pluto
Not a planet, dwarf planet, very small
