Is there l ife o ut t here our solar system and beyond
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Is There L ife O ut T here? Our Solar System (and beyond). Draw a picture of what you think life would look like on another planet, if it existed. Describe why you drew that image. What is needed for life to exist?. http://phl.upr.edu/library/notes/summarylimitsofthenewhabitablezone.

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Is there l ife o ut t here our solar system and beyond

Is There Life Out There? Our Solar System (and beyond)

Draw a picture of what you think life would look like on another planet, if it existed.

Describe why you drew that image.


What is needed for life to exist
What is needed for life to exist?

http://phl.upr.edu/library/notes/summarylimitsofthenewhabitablezone

  • Liquid water

  • Habitable Zone

  • What can effect HZ?

    • Star – size and temperature

    • Distance from star

    • Size of planet

    • Structure of planet

      • Presence of atmosphere

      • Other source of heat


Our sun
Our Sun

http://www.nasa.gov/images/content/524990main_FAQ10_full.jpg

  • How did it form?

  • Basic facts

    • 99.8% of mass

    • 100x diameter of Earth

    • 5,527oC

    • 92.1% H, 7.8% He

    • Plasma

    • Sun today


Inner solar structure
Inner Solar Structure

  • Core

    • Dense

    • Hydrogen fusion

  • Radiative (radiation) zone

    • Uses radiation

    • Energy moves slowly

  • Convection zone

    • Uses convection

    • Materials rise and sink due to density

    • Moves more quickly


Outer solar structure
Outer Solar Structure

  • Photosphere

    • Visible surface

  • Chromosphere

    • Red

    • High speed gas

  • Corona

    • Hot

    • Outermost layer

    • Seen during an eclipse


Surface feature basics
Surface Feature Basics

http://www.space.com/11506-space-weather-sunspots-solar-flares-coronal-mass-ejections.html

http://oneminuteastronomer.com/1018/sunspots/

  • Sunspots

    • Dark

    • Cold

  • Solar flares

    • High energy

    • Explosive

  • Prominence

    • Loops/arches

http://spacefellowship.com/news/art21967/the-strange-case-of-solar-flares-and-radioactive-elements.html


Daily review 1
Daily Review #1

  • Video

    • Write down your observations

    • Why did that happen?

  • Correct solar structure worksheet

  • What is needed for life as we know it?

  • Describe 3 things that would effect where life could be found in a solar system.



Sun s magnetic field
Sun’s Magnetic Field

http://www.cbsnews.com/8301-205_162-57597396/

  • What is a magnetic field?

  • What causes a magnetic field?

    • On the Sun?

  • Effect of rotation

    • Different rotation rates

    • Magnetic field lines get wound up

    • Eventually snap

      • Causes a solar flare

  • Solar prominences

    • Follow magnetic field lines into space


Daily review 2
Daily Review #2

Solar Quiz – Get out a computer and log on to your account


Sunspots
Sunspots

  • Cooler than nearby areas

  • Appear in pairs

  • Intense magnetic field

    • Lines go out and in

  • Predictable cycle

    • 11-years

    • Minimums

      • Last = 2008

      • Low # of prominences, flares and sunspots

      • Cooler climate on Earth

    • Next maximum = 2013


Solar wind
Solar Wind

http://stereo.gsfc.nasa.gov/browse/2013/10/14/index.shtml

  • Hot, high speed, plasma streams

    • Corona expanding

  • Coronal Mass Ejections (CME)

    • Massive eruption

    • Rearrangement of magnetic field lines

    • One hit on 10/15/13

  • Effects on Earth

    • Disrupt magnetic field shape

    • Danger to astronauts

    • Damage electronics

    • Aurora


Aurora
Aurora

http://www.public.iastate.edu/~sdk/fick2003/october.html

  • Borealis or Australis

  • Interaction of particles and magnetic field

    • Particles drawn to poles

  • Colors

    • Elements

    • Altitude

  • Constantly changing

  • Video

http://news.nationalgeographic.com/news/2011/09/pictures/110930-northern-lights-aurora-borealis-bright-colors/#/space163-aurora-borealis-from-space_41077_600x450.jpg


Distances within our solar system
Distances within our Solar System

  • Astronomical unit (AU)

    • Average distance from Sun to Earth

      • 1 AU= 9.3 x 107mi = 1.5 x 108km

      • Calculate the AU distance between the Earth and the Moon, 0.38 million km


Nebular theory
Nebular Theory

  • Origin of the Solar System

    Our Solar System formed from a giant, swirling cloud of gas & dust.

  • Depends on two principles of Physics:

  • •Newton’s Law of Gravity- gravitational potential energy ! heat

  • •Conservation of angular momentum - rotational motion is conserved


Forming the solar system
Forming the Solar System

http://www.seasky.org/solar-system/solar-system.html

  • Nebula

  • Inner edges

    • Heavier elements

    • Hotter

    • Rocky planets

  • Outer edges

    • Cooler

    • Lighter elements

    • Gas planets

  • Nebula  planetesimals  protoplanets

http://lifeng.lamost.org/courses/astrotoday/CHAISSON/AT315/HTML/AT31502.HTM


Formation cont
Formation – cont.

http://csep10.phys.utk.edu/astr161/lect/solarsys/revolution.html

  • Asteroid belt

    • Smaller bodies

    • Irregularly shaped

    • Orbit, but may wobble

    • Effected by Jupiter

    • May leave and collide with planets

  • Evidence for formation from one nebula

    • Nearly circular orbits

    • Orbit in same direction

    • Orbits in same plane

    • Planets rotate in same direction (mostly)


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