Notes – Motion Of Our Solar System In Our Galaxy

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Presentation transcript:

Notes – Motion Of Our Solar System In Our Galaxy Learning Target(s): E5.p1D - Describe the position and motion of our solar system in our galaxy.

Notes – Motion Of Our Solar System In Our Galaxy Milky Way Galaxy Picture

You Are Here!!!

Notes – Motion Of Our Solar System In Our Galaxy Each Day We Are On Earth We Travel 1,598,400 Miles Around The Sun That works out to: 18.5 miles/sec 1,110 miles/minute 66,600 miles/hour

Notes – Motion Of Our Solar System In Our Galaxy Each Day We Are On Earth We Travel 24,855 Miles On Our Axis That works out to: 1040 miles/hour 17.3 miles/minute .3 miles/second

Notes – Motion Of Our Solar System In Our Galaxy The sun is about 26,000 light-years from the center of the Milky Way Galaxy, which is about 100,000 light- years!

Notes – Motion Of Our Solar System In Our Galaxy How Far Is This???

Notes – Motion Of Our Solar System In Our Galaxy 5,865,696,000,000 miles/year x 100,000 l.y. = 5,865,696,000,000,000,000 (quintillion) miles/year

Notes – Motion Of Our Solar System In Our Galaxy It takes the sun (and our solar system) roughly 200-250 million years to orbit once around the Milky Way.

Notes – Motion Of Our Solar System In Our Galaxy In other words, that last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.

Notes – Motion Of Our Solar System In Our Galaxy In fact, this Sun orbit has only happened 20.4 times since the Sun itself formed 4.6 billion years ago.

Notes – Motion Of Our Solar System In Our Galaxy It’s estimated that the Sun will continue fusing hydrogen for another 7 billon years or so. In other words, it only has another 31 orbits it can make before it runs out of fuel.

Notes – Motion Of Our Solar System In Our Galaxy In this orbit, we (and the rest of the Solar System) are traveling at a velocity of about 155 miles/sec. How Far Is This??? Hamilton, MI to South Lyon, MI…In 1 Second!!!

Notes – Motion Of Our Solar System In Our Galaxy Since the Sun is 26,000 light-years from the center of the Milky Way, it has to travel at an astonishing speed of 485,912 mi/hour in a circular orbit around the Milky Way center. How Fast Is This??? You could travel around Earth 19.5 times in an hour! 485,912/24,901 = 19.5 times!!!

Notes – Motion Of Our Solar System In Our Galaxy Just for comparison, the Earth is rotating at a speed of 1,100 mi/hour, and it’s moving at a speed of 67,108 mi/hour around the Sun.