Why dont Terresttrial planets have ring systems like Jovian planets

Why is almost every solid surface in our solar system scarred by craters?

Some interplanetary properties. Use excel calculator to fill in the missing calculations. use mass of the sun Msol= 1.99 x 10^30 kg

the area in between Mars' and Jupiter's orbit to be ~1.6e18 km2. Since there are roughly 750,000 asteroids, how much area (in km2) is available for one asteroid? Use this calculation to argue whether you are likely (or not) to hit an asteroid while flying through the asteroid belt. (Hint: To answer the first part of the question, find the area per asteroid)

1. Which of the outer planets have compositions dominated by the "ices" ingredient? Check the correct two. 2. Which of the outer planets have compositions dominated by the "gases" ingredient? Check the correct two.  3. Most of the spaceflight missions to the outer planets have been flyby missions, but two of them were orbiters. Which of these two spacecraft orbited giant planets? Check the correct two. (Hint: An orbiter might do a flyby of one planet and then go on to orbit a different planet.) 4. Jupiter's mass is how many times larger than the Earth's? Just type a number, no words or any other extra stuff. 5. Which of the outer planets has extreme seasons, with its rotational axis being tilted so much that it is practically in the plane of its orbit?

What is the evidence that Juper and Saturn are still cooling?

How much would a 10lb bowling ball weigh on an exoplanet that was twice as massive as Earth but had the same radius? 1. 10lb 2. 40lb 3. 100lb 4.  none of the above

(a) Calculate the time necessary for Kepler shear to spread rings with the following parameters over 360° in longitude: Width 1 km, orbit 80 000 km from Saturn. Width 100 km, orbit 80 000 km from Saturn. Width 1 km, orbit 120 000 km from Saturn. Width 2 km, orbit 63 000 km from Neptune. no chat GPT HAND WRITTEN ONLY OTHERWISE WILL LEAVE A DOWNVOTE

How many impacts would you expect to strike a 100m2 region in one hour during Earth’s formation, assuming that Earth grew to its present size in 10 million years from particles averaging 100 grams each? (Hint: Assume that Earth had its current radius of 6378km.) (Notes: The surface area of a sphere is 4pir2 ; 1yr=3.2x107 .)   a. About 1300.     b. About 13 .     c. About 13,000.     d. About 130

How cacan you tell, from naked-eye observation alone, whether a particular object in the sky is a planet?