Try This! How did our solar system form? Solar System Formation Early universe hot cloud of...

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SPACE EXPLORATION PART 2

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Solar System Formation  Early universe – hot cloud of mostly hydrogen and helium  Gases clump to form nebula and gravity begins to concentrate mass  Stars are created through nuclear fusion - huge amounts of light and heat!

Transcript of Try This! How did our solar system form? Solar System Formation Early universe hot cloud of...

Page 1: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

SPACE EXPLORATION PART 2

Page 2: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

Try This!

How did our solar system form?

Page 4: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

Solar System Origin (4.56 b.y.a.)ROTATING NEBULA THEORY

Gravitational contraction and rotation of interstellar gas

Planetary disk with central bulge

Gravity causes sun to form Fusion and proto-sun Planets form from debris left

Page 5: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

Evidence for Rotating Nebula Theory1. The solar system is all the same

age approx.2. The planets all rotate in the same

direction and on the same planehttp://www.youtube.com/watch?v=xt9Bvc8s_d0Hubble video 9 minutes

Page 6: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

We Can Also Look and see solar systems forming elsewhere….

Close-up of “Protoplanets" in Orion

Page 7: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

What’s in our solar system?

Page 8: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

TERRESTRIAL PLANETS•Density (mass/volume) = 4.0 - 5.5 g/cm3

•Earth is 149 597 871 km from the sun = 1 AU (astronomical unit)

The Inner Planets: solid/rocky

Page 9: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

The Asteroid Belt

Not all solar material formed planets!

Asteroids orbit between Mars and Jupiter

Source of majority of meteorites that fall to Earth

Most get pulled into Jupiter due to its large gravity

Page 10: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

Stony meteorites

95 % of falls They are called meteorites if the hit the Earth’s

surface Most burn up in the atmosphere and are called

meteors or “shooting stars”

Page 11: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

Meteoroid, Meteor, Meteorite…

http://upload.wikimedia.org/wikipedia/commons/6/63/Meteoroid_meteor_meteorite.gif

http://www.youtube.com/watch?v=4S6KatI7M3A

Page 12: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

•Captured a greater amount of the lighter materials of the initial solar cloud•Density = 0.6 – 1.7 g/cm3

The Gas Giant Planets

Page 13: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

Kuiper Belt

Disk of debris at the edge of our Solar System

Pluto is a KB Object (sorry!)

Source of some comets

Page 14: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

Pluto?

considered a dwarf planet –not a true planet

Pluto ranges from 30 – 40 AU’s from the SUN

(30 to 40 times farther from the SUN than Earth is!)

It has 3 moons

Frozen and rocky

Page 15: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

Comets… frozen snowballs

Dust tail – white, “smoke,” reflects sun. 600,000 to 6 million miles long tail – Solar UV breaks down CO gas, making them glow blue for of millions of miles

Page 16: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

The planets don’t ever all line up like this, but it shows their order and relative size

Earth is 1/1,000,000 the volume of the Sun

Page 17: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

Try This!Planetary Preview – Complete the tableName of Planet

What I know What I wonder

What I learned

Page 18: Try This!  How did our solar system form? Solar System Formation  Early universe  hot cloud of mostly hydrogen and helium  Gases clump to form nebula.

Jigsaw “The Universe and Its Stars”A. The origin of the universeB. Measuring distances in spaceC. The Birth of Stars, including our SunD. Stars: Old Age, Death and New LifeE. Galaxies and our Home: The Milky

WayF. Dark Energy and the Expansion of

the Universe