Planet the Drake equation, which estimates the number of intelligent, communicating civilizations that exist in the Milky Way. There are exoplanets that are much closer to their parent star than any planet in the Solar System is to the Sun, and there are also exoplanets that are much farther from their star. Mercury, the closest planet to the Sun at 0.4 AU, takes 88 days for an orbit, but the shortest known orbits for exoplanets take only a few hours, e.g. Kepler-70b. The Kepler-11 system has five of its planets in shorter orbits than Mercury's, all of them much more massive
The Message to the Planet is a great novel, a merely interesting one, or an unclassifiable pandemonium". Another reviewer remarked that anyone "seeking an untroubled read and pat answers should seek them elsewhere". In his study of Iris Murdoch's fiction, Peter Conradi wrote that "The Message to the Planet" was a "lesser" novel, inferior to its predecessor "The Philosopher's Pupil", but with some memorable scenes. On the other hand, Suguna Ramanathan calls it "an extraordinary achievement" and "of all her 24 novels, the largest in scope and most powerful in thrust". The Message to the Planet The Message to the Planet is a novel by