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If it has mass, it has gravity! What does it cause to happen?
Attraction, orbiting Laws - Newton
More mass = more gravity Closer together = more gravity Fall at constant rate
Theories Why does it exist? Einstein Gravitons
Gravity
http://walrus.wr.usgs.gov/infobank/programs/html/definition/grav.html
http://www.universetoday.com/38858/new-way-to-measure-curvature-of-space-could-unite-gravity-theory/
Nebula Gravity Mass
builds up Evidence for formation from one
nebula Nearly circular orbits Orbit in same direction Orbits in same plane Planets rotate in same direction (mostly)
How does the other stuff form?
http://lifeng.lamost.org/courses/astrotoday/CHAISSON/AT315/HTML/AT31502.HTM
Heavier elements Hotter Terrestrial planets Asteroid belt
Effected by Jupiter May leave and
collide with planets Meteorites
What’s happening towards the Sun?
http://www.foxnews.com/science/2014/07/24/11-need-to-know-things-about-our-solar-system/
Cooler Lighter elements Gas giants Kuiper belt
Icy chunks Asteroids Pluto
Oort cloud Comets Source of Earth’s water?
What’s happening at the outer edge?
http://www.foxnews.com/science/2014/07/24/11-need-to-know-things-about-our-solar-system/
You would weigh differently on Jupiter than on Earth!
Mass kg, g, lbs. Definition
Doesn’t change with location
Weight Newtons Definition
Can change with location
http://pgceandteaching.wordpress.com/2013/06/18/the-difference-between-mass-and-weight/
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 380,000 km
Distances within our Solar System
13.How has gravity played a role in the forming of the rest of the stuff in the solar system?
14.If you were on Jupiter, would you weigh more, less or the same as on Earth?
15.If you were on Jupiter, would you have more, less or the same amount of mass as on Earth?
16.Create a way to remember the order of the planets.
17.Create your own definitions for planet, dwarf planet, moon, comet and asteroid.
Daily Review #4
…what do the scientists say?
Planet1. Orbit only a star2. Round3. Dominant object in its
orbit Dwarf planet
1. Orbit only a star2. Round3. Not dominant object
in its orbit Tends to be small Rocky and icy
http://www.windows2universe.org/our_solar_system/dwarf_planets/dwarf_planets.html
Moons1. Orbit another
body Asteroid
1. Orbit only a star2. Irregularly
shaped Tend to be small Meteors – when in
our atmosphere
Moons and Asteroids
http://en.wikipedia.org/wiki/File:Asteroidsscale.jpg
http://starryskies.com/The_sky/events/lunar-2003/planets.moons.jpg
1. Ball of frozen gas and dust
2. Orbit only a star
3. Large, very elliptical orbits
Comets
http://14-billion-years-later.tumblr.com/image/16213560898
http://solarsystem.nasa.gov/planets/profile.cfm?Object=Comets
Orbits the sun once every 90,465 days
Volume is about 1/200th the size of Earth Large enough to relatively round in shape
Average surface temperature -229O C ~5.9 billion km from the Sun (outside
of the gas giants) Elliptical and angled orbit
Crosses paths with Neptune (which is much larger than this new object)
A new celestial body has been discovered! How should this body be classified and why?
Why is it not a planet?
1. Orbit a star? Yes
2. Round? Yes
3. Dominant object in orbit?
NO! What is Pluto?
This object is also known as…
PLUTO!!!