Download Introduction to the solar system

LEARNING TARGET: I WILL BE ABLE TO
DISTINGUISH THE DIFFERENCE BETWEEN THE
PARTS OF OUR SOLAR SYSTEM
WARM –UP
WRITE THE PLANETS IN ORDER
INTRODUCTION TO THE
SOLAR SYSTEM
CHAPTER 4.1
CHANGING VIEWS OF OUR SOLAR SYSTEM
• EARTH AT THE CENTER OF THE UNIVERSE
• EVERYTHING WAS IN SPHERES ROTATING AROUND
EARTH
• ~ 150 AD PTOLEMY PUBLISHED A MODEL OF THE
SOLAR SYSTEM
CHANGING VIEWS OF OUR SOLAR SYSTEM
THE SUN AT THE CENTER OF THE UNIVERSE
• ~1500 YEARS AFTER PTOLEMY
• COPERNICUS PROPOSED SUN IN THE CENTER
OF THE UNIVERSE
• MODEL WASN’T PUBLISHED TILL HE DIED
• WASN’T UNTIL GALILEO CREATED HIS TELESCOPE
• PROPOSED THE PLANETS ORBIT THE SUN LIKE THE
MOONS OF JUPITER ORBITED THE PLANET
PLANETS AND THEIR MOTION
• SOLAR SYSTEM: THE SUN AND ALL THE OBJECTS THAT ARE HELD TOGETHER BY THE
SUNS GRAVITY
• 8 PLANETS, 5 DWARF PLANETS, OVER 165 MOONS, MANY ASTEROIDS AND OTHER OBJECTS
WHAT IS AND IS NOT A PLANET
• PLUTO
CONTROVERSY
• PLANET WAS DISCOVERED IN 1930 LATER TO FIND THAT IT WASN’T LIKE THE OTHER 8 PLANETS
•
THEY WERE USING OLDER TELESCOPES SO THEY DIDN’T HAVE THE ABILITY TO SEE PLUTO AND ITS MOON AS TWO SEPARATE THINGS
•
ASTRONOMERS ALSO DISCOVERED MANY OBJECTS LIKE PLUTO ( ICY AND ROCKY)
• THEY HAD TO DECIDE…. WHAT MAKES A PLANET
WHAT MAKES A PLANET A PLANET
• A PLANET MUST BE THE FOLLOWING
• ORBIT A STAR
• BE BIG ENOUGH
THAT ITS OWN GRAVITY
CAUSES IT TO BE ROUND
• BE SMALL ENOUGH
IT ISN’T A STAR ITSELF
• HAVE CLEARED THAT AREA OF ITS ORBIT
• DWARF PLANET
• IF THE FIRST THREE LISTED ABOVE ARE TRUE
THE SIZE AND SHAPE OF ORBITS
• THE FARTHER FROM THE SUN THE GREATER THE ONE PLANETS ORBIT IS TO THE NEXT PLANET
THE SIZE AND SHAPE OF ORBITS
• PLANETS ARE HELD IN THEIR ORBITS BY GRAVITY
• GRAVITY DEPENDS ON THE MASS OF THE OBJECT AND HOW FAR APART THE OBJECTS ARE FROM
EACH OTHER
EXTRASOLAR PLANETS
• SINCE EARLY 1900’S WE
•
HAVE DISCOVERED OTHER SOLAR SYSTEMS
EXOPLANETS
• WHEN A PLANET ORBITS A STAR OTHER THAN OUR SUN
• SIGNS
• SLIGHT MOTION IN THE STAR DUE TO THE PLANETS GRAVITATION PULL
• PARTIAL DIMMING OF STAR’S LIGHT AS THE PLANET PASSES IN FRONT