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Unformatted text preview: Out to ~100,000 Aus (~1 ly) (THE furthest thing in our Solar System) Has a trillion comets (?) Comets orbit in random directions, elliptical orbits, tilted with respect to Solar System Nucleus actual comet itself o Not reflective dirty ice (darker than coal only 5% reflective) Dust tail bright, yellowish tail formed by sunlight heating evaporating ice, releases it into Solar System o Points away from Sun, but curved in direction of motion Plasma tail thin, straight, bluish tail o UV radiation, solar wind ionizes material, plasma given off, swept away by solar wind o Always points directly to sun...
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- Spring '09