Geology of solar terrestrial planets Earth, and Mars) have substantial atmospheres; all have impact craters and tectonic surface features such as rift valleys and volcanoes. The term "inner planet" should not be confused with "inferior planet", which refers to any planet that is closer to the Sun than the observer's planet is, but usually refers to Mercury and Venus. The Solar System is believed to have formed according to the nebular hypothesis, first proposed in 1755 by Immanuel Kant and independently formulated by Pierre-Simon Laplace. This theory holds that 4.6 billion years ago the Solar System formed from the gravitational collapse of a giant molecular
Martian Through Georgia that the Martian could just commit suicide, since nobody loves him. The Martian takes out his ray gun and prepares to blow his brains out, when the narrator helps him remember that somebody does love him. Taking this advice to heart, the Martian puts his antenna back in place on his head and remembers the female Martian he had turned down earlier. As the narrator says someday, a new constellation will appear, the Martian, now wanting to seek happiness back on his home planet, blasts off back home, which is seen as a star in a constellation of stars that