What attributes do the Jovian planets have in common?
They all have rings. They are all very massive. They all are mainly giant gas balls, and so they have a low density. 4) Why does Venus have a runaway greenhouse effect? There is a great deal of carbon dioxide (CO2) in the atmosphere of Venus which traps heat in the atmosphere. 5) Compare the age of the Earth, the age of the Solar system, and the age of the Universe. The age of the Earth and the age of the solar system are believed to be about the same (about 5 billion years), while the age of the universe is at least twice, and perhaps as much as 4 times older (10 to 20 billion years). 6) Describe a method by which you could determine the actual diameter of the planet Mars. You may make any observations you wish from the surface of the Earth. (No satellite data.) Hint: You’ll need Kepler’s laws. You would measure the time it takes Mars to orbit the sun. Using this information and Kepler’s laws you can determine the distance from the sun to Mars. We know the distance of the Earth to the
