How Did the Planets Get Their Names?
NOTES: DIST. FROM SUN is in Astronomical Units (A.U.), which is the distance between Earth and the sun, or 93,000,000 miles. ORBIT PERIOD is in Earth years. This is length of time for the planet to circle the sun, so this is the planet's “year.” PLANET MASS RADIUS SURFACE GRAVITY (g) Mercury 0.0558 0.381 0.38 Venus 0.815 0.951 0.90 Earth 1.000 1.000 1.00 Mars 0.107 0.531 0.38 Jupiter 317.89 10.85 2.64 Saturn 95.184 8.99 1.13 Uranus 14.536 3.96 0.89 Neptune 17.148 3.85 1.13 Pluto 0.0022 0.18 0.06 NOTES: MASS, RADIUS, and SURFACE GRAVITY are all compared to Earth. Earth's radius is about 3,800 miles. If you could weigh Earth, it would weigh13,000,000,000,000,000,000….. (24 zeros) pounds! Whoa! That's heavy! Do the weights of planets stay the same? Pretty much. Over millions of years, they pick up some space dust but that's very little compared to how much they weigh to start with. Can you tell if a comet crash is going to hit a planet before it happens? If we know about the
