Earth’s Solar System Astronomy
*8 Planets Go Around The Sun *Satellites (Moons) of Planets *Asteroid Belt *Comets Sun = Star
My Very Educated Mother Just Served Us Nachos!!!
My Mercury
Very Venus
Educated Earth
Mother Mars
Just Jupiter
Served Saturn
Us Uranus
They’re Outta This World!
Nachos Neptune
Two Groups Of Planets
Inner Planets – Dense, Rocky & Solid Mercury – So Hot...No Atmosphere Venus – Very Bright In The Sky Earth - …Earth Science Rox Mars – Fe = Red
Asteroid Belt
Outer Planets – Larger, Gas, Less Dense Jupiter– Biggest Planet Saturn– Rings, < Dense Than Water Uranus- Rings Discovered 1977, -370 F Neptune – Discovered in 1930 Two Groups Of Planets
Planetoids... Pluto – Small, Fits Inside USA Sedna – Newly Discovered Xena – Newly Discovered UB313 – Newly Discovered Many, Many Others...
Star Brightness Apparent Magnitude – how bright a star appears to an observer on
Star Brightness Luminosity – true brightness of a …depends on size, temp & distance Candle vs Light Bulb vs Flashlight Distance!!!
Star Brightness Absolute Brightness – Luminosity of a if they were the same distance…apparent magnitude 32.6 light years from sun
Light Year Distance Light Travels In 1 Year… 9.5 Trillion km 9,500,000,000,000 km 9.5 X km