Download Class Notes for Monday, Feb 20th

Class Notes for Monday, Feb
20th
When you get to slide #
Terms to know
• Solar System
– Our star (Sun) and everything
that orbits around it (planets,
asteroids, comets, etc.)
• Galaxy
– Huge collection of stars
bound together by gravity
(the Sun is 1 star among 100400 billion stars in the Milky
Way galaxy)
• Universe
– Everything (~100 billion
galaxies)
The Sun
• The Sun is a star.
• It is 4,500 million years
old
• It takes 8 minutes for
its light to reach the
Earth.
• 98.6% mass of the
Solar System
• Consists of Hydrogen
(74%) and Helium
(24%)
•Surface Temperature: 5,500 °C
• Core Temperature: 15,500,000 °C
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto
My
Very
Easy
Method
Just
Speeds
Up
Naming
Planets
These planets are grouped into two categories, the inner
planets and the outer planets.
The Solar System
Inner planets are mostly solid, made of
minerals similar to those found on
Earth. These planets are smaller and
hotter than the outer planets.
Inner Planets
•
•
•
•
“Terrestrial Planets”
Rocky
Dense
Metal cores (iron)
Outer planets are all huge balls of gas, called gas
giants, except for Pluto. Each might have a solid core,
but none has a solid surface. These gas giants are
known to have lots of moons and rings of dust and ice.
Outer Planets
• Large!
• Gases and liquids
• No solid surface
• May have a small solid
core
• Tumultuous
atmospheres - rapid
winds, large storms
• Rotate relatively quickly
For the Next Slides Make the Following
Table in Your Notebook:
Planets
Distance
From the
Sun
Diameter
Temp in °
Length of
Day (Earth
Days)
Length of
Year (Earth
Years)
Distance From The Sun
57,900,000 km
Diameter
4879 km
Temperature
450oC
Length of Day
59 Earth days
Length of Year
88 Earth days
• The next slide should be written below your
table you made and look like this:
Mercury
• Scans indicate that craters at the poles contain
water ice.
• Temperatures reach 450° C during the day.
**You will do this for every planet after you put
the other information into the table.
Mercury
• Scans indicate
that craters at
the poles
contain water
ice.
• Temperatures
reach 450°C
during the day.
• Radius: 2400 km
• Mass: 3.30 x 1023 kg
• Distance from Sun: 58 million km (0.38 AU)
Distance From The Sun
108,000,000 km
Diameter
12,104 km
Temperature
464oC
Length of Day
116 Earth days
Length of Year
224.7 Earth days