Waves in the Universe

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Waves in the Universe

• Size, distance, light

C 186,000 miles per sec
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Light is a wave
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The Inner planets (plus Pluto) Earths Moon is
about the same size as Mars.
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The Moon is 250,000 miles from Earth.
Light takes 1.2 sec to travel from the Moon to
the Earth.
Light takes 8.5 minutes to travel from Sun to the
Earth.
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The 6' Earth globe in Abrams Planetarium
lobby Michigan State University, East Lansing, MI
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Where is Pluto?

• Start at Lansing, Michigan.
• Calculate the distances to the other planets to
  scale.
• Where would Pluto be?

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Jupiter - in Detroit Saturn - in Chicago Uranus
- in Pittsburgh Neptune - Wash, DC Pluto - Cape
Cod Alpha Centauri - 145 times around the
world!
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Pluto is 3660 million miles from the Sun.
(Charon and Sun - artists idea) Light takes 5
hr 40 min, Sun to Pluto.
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Nearest star. Alpha Centauri Light takes 4.3
years to get from AC to Pluto!
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Antares is the 15th brightest star in the sky.
It is more than 1000 light years away.
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Our galaxy, the Milky Way. Light takes 100,00
years to cross the galaxy.
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About 3,000 Galaxies in a small patch of the
sky. Light travels 5,900,000,000,000 miles in a
year called a Light Year.
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70,000,000,000,000,000,000,000 stars (7X1022)
70 Sextillion!! That is10 times as many
stars as there are grains of sand on all the
world's beaches and deserts put together.
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Our closest start is about four light years away
(23,462,784,000,000 miles) The edge of the
universe? About 15 billion light years
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To fly to the Moon at a constant speed of 1000
km/hr, takes sixteen days The Sun happens to be
400 times the Moon's diameter, and 400 times as
far away.