httpwwwcswrightedutkprasad Universe Milky Way Galaxy Solar System including the star Sun the planet Earth the moon Moon etc Planet Earth Seven Continents ID: 134801
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Slide1
Our Space Time Coordinates: Time, Distances, and Sizes
http://
cecs.wright.edu
/~tkprasadSlide2
Universe
Milky Way
Galaxy
Solar System (including the
star
Sun, the
planet
Earth,
the
moon
Moon
(!), etc)
Planet Earth
Seven
Continents
and Four
Oceans
North America, South America, Europe, Africa, Asia, Australia,
Antartica
Pacific, Atlantic, Indian, Arctic
Countries, States, Cities
United States of America, Ohio, Dayton
Russ Engineering Center, Wright State University, 3640, Col. Glenn HighwaySlide3
Measuring Distances
Average Distance between Sun and Earth
= 93 million miles
(1 Astronomical Unit)
(Speed of light = 186000 miles per second)
(1 light second = 186000 miles )
= 500 light second
= 8.33 light minutesSlide4
Visualizing Distances
If
1 inch
is
the distance between sun and earth
,
then
1 mile
is equivalent to
1 light year
.
1 parsec = 3.26 light yearsSlide5
Solar System scaled to Football field
Body
Diameter
Semi-major axis
Sun
0.85 in
(21.5 mm)
zero
Mercury0.003 in (0.08 mm)1.0 yard (0.9 m)Venus0.007 in (0.19 mm)1.9 yard (1.7 m)Earth0.008 in (0.20 mm)2.5 yard (2.3 m)Mars0.004 in (0.10 mm)3.8 yard (3.5 m)Ceres0.001 in (0.02 mm)7.0 yard (6.4 m)Jupiter0.085 in (2.16 mm)13.1 yard (12.0 m)Saturn0.071 in (1.8 mm)24.2 yard (22.1 m)Uranus0.029 in (0.73 mm)48.6 yard (44.4 m)Neptune0.028 in (0.7 mm)76.1 yard (69.6 m)Pluto0.002 in (0.05 mm)100.0 yard (91.4 m)Eris0.002 in (0.05 mm)171.4 yard (156.7 m)α Centauri A0.94 in (23.9 mm)396 mile (637 km)Slide6
Distances to nearby objects
Heavenly
Body
Average
Distance
from Earth
Moon
1.3 light secondsSun 8.3 light minutesMars12 light minutes(0.5 – 2.5 AU)Jupiter42 light minutesSaturn1.2 light hoursPluto4 light hoursComets – outer reaches of solar systemLight monthsSlide7
Distances to Stars
Stars
Distinction
Distance
from Earth
(light years)
Proxima
Centauri
Nearest Star4.2 light yearsSiriusBrightest Star (in night sky)8.6 light yearsPole starNorth star, Cepheid Variable300 light yearsRigel/BetelgeuseBlue/Red giant in Orion800/600 light yearsDenebBlue giant in Cygnus1500 light yearsAndromeda GalaxyNearest galaxy2 million light years*HST Image*Most distant galaxy13 billion light yearsSlide8
Age vs
DistanceSlide9Slide10
Universe Distances
http://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.html
http://cass.ucsd.edu/public/tutorial/scale.html
http://cass.ucsd.edu/public/tutorial/Intro.htmlSlide11
Universe Timeline
http://www.pbs.org/deepspace/timeline/index.html
http://www.historyoftheuniverse.com/tl1.html
Slide12
Sizes of planets and stars
Planets, Stars, Nebulae, Galaxies - Universe Size Comparison [HD High Definition]
http://
www.youtube.com/watch?v=WcZkAZebK1U&NR=1
https://
www.youtube.com/watch?v
=oNb3H9kICbA