Unique Pictures

2 Unique Features Of Each Planet . Now have a look at what we know and can see about other planets in our So to start with here are some unique features of planet Earth. You must keep this in mind while calculating transitory effects. D E V I X / S Z E L L — Hawking's Terrestrial Planet (Allen Day) The first and foremost similarity between the planets in these two groups is with respect to their origin, that is, they are all part of the same primordial solar nebula. The combination of physical features gives each place a distinctive character. Interpret solar system statistics (table given) : day length=year length=. A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion. Gravitational Forces on the Planets The planet with the strongest gravitational attraction at its surface is Jupiter. Uniqu...