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Distances in Space. Astronomical Unit (AU)  The average distance between the sun and the earth.

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Presentation on theme: "Distances in Space. Astronomical Unit (AU)  The average distance between the sun and the earth."— Presentation transcript:

1 Distances in Space

2 Astronomical Unit (AU)  The average distance between the sun and the earth.

3  1 AU is equal to 93 million miles or 150 million kilometers  An AU is a standard of distance used within the solar system

4  Example: Jupiter 5.2 AU  Light travels 1 AU in eight minutes.  Sound travels 1 AU in 14 years

5 Mercury Venus Earth and Moon Mars The Planets of Our Solar System The Inner Planets Sizes to Scale

6 The Planets of Our Solar System Jupiter Saturn Uranus Neptune Pluto The Outer Planets Earth Included for Scale.

7 SIZES AND DISTANCES IN THE SOLAR SYSTEM Sizes Diameters of Solar System Members: Sun = 1,392,000 km Mercury = 4,878 km Venus = 12,104 km Earth = 12,756 km Mars = 6,794 km Jupiter = 142,984 km Saturn = 120,536 km Uranus = 51,118 km Neptune = 49,530 km Pluto =2,304 km Mean Distance from Sun 57,900,000 km = AU 108,200,000 km = AU 149,600,000 km = AU 227,900,000 km = AU 778,300,000 km = AU 1,427,000,000 km = AU 2,871,000,000 km = AU 4,497,000,000 km = AU 5,914,000,000 km = AU Earth’s Moon = 3,476 km Mean Distance from Earth = 384,400 km

8 Fun Facts About the Planets   18 Mercury’s would fit inside the Earth.   Venus is always cloudy.   Earth is the only planet we know with life.   Mars is red because it is covered with rust.   A storm (hurricane) on Jupiter can swallow 2 Earths.   Each season on Saturn is more than seven years long.   By the time you get to Uranus, you are only halfway to Pluto.   Neptune is the windiest planet, with winds blowing over 1,000 miles-per-hour.   Pluto is a ball of ice and rock and is a dwarf planet.

9 Light Year (LY)  The distance a ray of light travels in one year  The speed of the ray of light would be equal to:  7.2 AU per hour or  300,000 km/sec or  186,000 miles/sec.

10  A Light Year is a standard unit of measurement for interstellar distances beyond the solar system.  Milky Way Galaxy is approx. 100,000 LY across in distance

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12 Nearest star to the sun is Proxima or Alpha Centauri C approx 4.22 LY

13 Proxima (or Alpha Centauri C) is a red dwarf Alpha Centauri A is a yellow star Alpha Centuari B is an orange star

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15 Parsec  One parsec is equal to 3.26 light years  A parsec is a unit of measurement used for distances between very far structures in the universe.  Example: distances between galaxies

16 Andromeda and Milky Way  The Andromeda Galaxy (M31) is slightly less than 800 kpc or Andromeda GalaxyM31Andromeda GalaxyM31 800,000 parsecs away from Earth.

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