Lauren and Jane - Red Class

Nick D. & Mike G. ~ Orange Class

Milky Way

  • Spiral Galaxy
  • Only galaxy with known life
  • 80,000-100,000 light years in diameter
  • 250,000-300,000 light years in circumference
  • 10,000 lights years thick in the middle
  • Estimated 200 billion stars
  • Solar System's orbit takes 225-250 million years to complete
  • 750 Billion - 1 Trillion Solar masses (mass of The Milky Way)
external image galaxy.gif

Universe

external image uesc_09_img0528.jpg ~ (The Big Bang)

  • Our universe is a spiral universe
  • Evidence of evolution for the Universe comes from the Big Bang theory
  • 13.7 Billion years ago (Big Bang)
  • 1 Billion years later: Cosmic Dawn
  • 4.6 Billion Years ago, sun, galaxies, and planets formed
external image universe.jpg

Light Years

  • 1 lightyear = 6 trillion miles (or 9,500,000,000,000 kilometers) - From the Textbook!
  • Practice Problem: If Joe's planet is 9 light years away from Sidney's planet, how many miles away are they?
  • Definition of a light year: Distance light will travel in a vacuum in per year
  • 1 Parsec = 3.26 Light Years
  • Proxima Centauri is the closest star to Earth (besides the sun) at 4.24 Light Years
  • Brightest Star, Sirius, is 8.6 Light Years from Earth
external image figure2.jpg

Our Solar System!!


  • In order of distance from the sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
external image 155035main_solar-system-montage-browse.jpg
  • The Earth is on average about 93 million miles away from the sun
  • The Earth is 91 million miles away from the sun in the winter
  • The Earth is 94 million miles away from the sun in the summer

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10 - Measures of the Planets


Larger Scale Model
Planet
True Diameter in miles
Diameter
in inches

(50,653 miles/sheet)
True Distance to the Sun
in miles
Distance to Sun
in sheets

(50,653 miles/sheet)
Distance to Sun
in inches

(50,653 miles/sheet)
Distance to Sun
in feet

(50,653 miles/sheet)
Mercury
3,032
0.267
35,983,610
710
3,197
266
Venus
7,521
0.664
67,232,360
1,327
5,973
498
Earth
7,926
0.699
92,957,100
1,835
8,258
688
Mars
4,222
0.371
141,635,300
2,796
12,583
1,049
Jupiter
88,846
7.658
483,632,000
9,548
42,966
3,580
Saturn
74,898
6.391
888,188,000
17,535
78,906
6,576
Uranus
31,763
2.576
1,783,950,000
35,219
158,486
13,207
Neptune
30,778
2.494
2,798,842,000
55,255
248,648
20,721
Pluto
1413
0.124
3,674,491,000
72,542
326,441
27,203
The Sun's diameter in inches (at this scale) is 76.7 in

The Sun


  • Could fit over 1.3 million earths inside of it
  • The Surface temperature of the sun is 6,000 degrees Celcius
  • The core of the sun is over 15 million degrees Celcius
  • The sun's diameter is 104-109 times the earth's diameter
  • The solid parts of the sun rotate once every 27 days
  • The diameter of the sun is 870,000 miles
external image sun_full_disk_soho_09_14_1997.jpg

Textbook use:

We used the textbook to convert light years into miles, and we used our class notes to find the average distance of the earth and sun.