Out of the Silent Planet Robert McClenaghan writes, ""Out of the Silent Planet", the shortest and most straightforward of the [Space Trilogy] books, incorporates many of the elements of classic science fiction, including a space flight, meetings with fantastic aliens, and an extended depiction of another planet. Were it not for the theological backdrop (which comes into focus only toward the story's end), "Out of the Silent Planet" could pass as merely a well-written and exceptionally erudite pulp novel." John Gosling, on his website devoted to "The War of the Worlds", wrote that the novel "is a very well written and important piece of Martian
Colonization of Mars protect astronauts and spacecraft from radiation. In September 2017, NASA reported radiation levels on the surface of the planet Mars were temporarily doubled, and were associated with an aurora 25-times brighter than any observed earlier, due to a massive, and unexpected, solar storm in the middle of the month. Mars requires less energy per unit mass (delta V) to reach from Earth than any planet except Venus. Using a Hohmann transfer orbit, a trip to Mars requires approximately nine months in space. Modified transfer trajectories that cut the travel time down to four to seven months in space are possible