There have been several equations and relationships used in this class. Pick out what you consider the most important ten equations or relationships, write each one down, and write one sentence to explain why it is important. The observable universe is the universe that we can see, and it is limited by the amount of time that light from the distant objects has been traveling to us. However, the universe itself could be infinite in size. Condensation is the growth of a particle by addition of materials from surrounding gas, atom by atom.
Accretion is the sticking together of solid particles to produce a larger particle.
The stages are differentiation cratering flooding slow surface evolution page 396 R 11. Since Uranus is tilted almost 98 degrees with respect to its orbit, its seasons are extreme. At its summer solstice, the north pole is pointed almost directly at the sun and the sun would not rise nor set for most observers in its northern hemisphere. During its equinoxes, the sun is near its celestial equator, and the sun would both rise and set with each planetary rotation of 17 hr 14 min. Astronomers believe that the Oort cloud is made of several trillion icy bodies at 10,000 to 100,000 AU from the sun.