Lecture10 - Lecture #10: Solar System Survey II Distances...

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Lecture #10: Solar System Survey II • Distances and a Solar System Scale Model Distances and a Solar System Scale Model • Overview of Planetary Atmospheres Overview of Planetary Atmospheres Terrestrial Planet Atmosphere Astro 102/104 1 – Terrestrial Planet Atmospheres Terrestrial Planet Atmospheres – Jupiter, Saturn, Uranus, Neptune Jupiter, Saturn, Uranus, Neptune • Overview of Solar System Formation Overview of Solar System Formation Announcements Review sessions: Sunday and Monday Astro 102/104 2 7:30 pm Baker 135 No office hours on Monday The Main Point All of the planets with atmospheres in Astro 102/104 3 our solar system have distinctive weather and climate. Distances in the Solar System • The basic unit: Astronomical Unit (AU): – Defined as Earth's average distance from the Sun. – 1 AU 150,000,000 km 93,000,000 miles. • Can also think of distances in light travel time: Astro 102/104 4 – Light travels at 300,000 km/sec. – 1 AU = 150,000,000 km / (300,000 km/sec) = 500 sec. – Earth is a little over 8 “light minutes” from the Sun. – Neptune is more than 4 “light hours” from the Sun! – Nearest star ( α Centauri) is 4.3 “light years” away! – Nearby galaxy (Andromeda) is 2.5 million light years away!
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This note was uploaded on 03/04/2008 for the course ASTRO 1102 taught by Professor Squyres,s/margot,j during the Spring '07 term at Cornell University (Engineering School).

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Lecture10 - Lecture #10: Solar System Survey II Distances...

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