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!!!