Question: In Henry Olerich's, "A Cityless and Countryless World" what planet do the aliens come from?

Context paragraphs:
Aliens Restriction (Amendment) Act 1919: The Aliens Restriction (Amendment) Act 1919 (9 & 10 Geo 5 c 92) is an Act of the Parliament of the United Kingdom originally aimed at continuing and extending the provisions of the Aliens Restriction Act 1914 and the British Nationality and Status of Aliens Act 1914 and to deal with former enemy aliens after the end of the First World War.

List of Tokyo Mew Mew characters: The Mew Mews are led by the main character, Ichigo Momomiya, whose first task is to gather the other four Mew Mews: Minto Aizawa, Retasu Midorikawa, Bu-Ling Huang, and Zakuro Fujiwara.  As the series progresses, Ichigo goes from having a crush on Masaya Aoyama to becoming his girlfriend while trying to hide her secret double life from him.  The series antagonists include three aliens, Quiche, Pie, and Tart, and their leader, Deep Blue.  Originally from Earth, the aliens were forced to leave long ago due to deadly environmental changes.  They have returned to kill the humans, who they feel are destroying their planet, and reclaim the planet.  In "a la Mode", middle school student Berry Shirayuki is introduced as the sixth Mew Mew and, in the absence of Ichigo, the temporary leader of the Mew Mews.  "A la Mode" also introduces new set of antagonists, the Saint Rose Crusaders, a group of human teenagers with various psychic abilities with a desire to create their own utopia.  Led by Duke, they make several attempts to kill Berry, eventually turning the local populace against the Mew Mews.

Planet Comics: Planet Comics was a science fiction comic book title published by Fiction House from January 1940 to Winter 1953.  It was the first comic book dedicated wholly to science fiction.  Like most of Fiction House's early comics titles, "Planet Comics" was a spinoff of a pulp magazine, in this case "Planet Stories."  Like the magazine before it, Planet Comics featured space operatic tales of muscular, heroic space adventurers who were quick with their "ray pistols" and always running into gorgeous females who needed rescuing from bug-eyed space aliens or fiendish interstellar bad guys.

Henry Olerich: Henry Olerich (1851–1927) was a utopian author from Nebraska.  In his best known novel, "A Cityless and Countryless World" (1893), a Martian lands on earth to teach humans how to create paradise.  The method was to build houses that could hold 1,000 people, who would collectively farm and work.

Fantastic Planet: Fantastic Planet (French: La Planète sauvage , Czech: Divoká planeta , lit.  "The Wild Planet") is a 1973 animated science fiction film directed by René Laloux and written by Laloux and Roland Topor.  Topor also completed the film's production design and it was animated at Jiří Trnka Studio in Prague.  The film was an international co-production between companies from France and Czechoslovakia.  The allegorical story, about humans living on a strange planet dominated by giant humanoid aliens who consider them animals, is based on the 1957 novel "Oms en série" by French writer Stefan Wul.

Pickle Wars: Pickle Wars is a DOS platform game created in 1993 by Karen Crowther (now Karen Chun) through Redwood Games and published by MVP Software.  The script was written by Ellen Beeman.  A planet gets invaded by aliens (mainly pickles).  The player (alternating between playing a man and a woman) goes on a journey to find hidden weapons.  The player needs to collect all the SaladShooters in the level to pass through the exit door.  The player can then shoot salad at the aliens, and the aliens will faint.  Junk food and pickles are collectible for points, and carrots are for health.

Mor-Tax: Mor-Tax is the name of the planet on which the aliens from the first season of the "War of the Worlds" TV series, the Mor-Taxans, originate.  While the show's existence as a continuation from the 1953 film would make the aliens Martians, the first season rewrites this origin due to the supported fact that no intelligent life is evident to exist or have existed on Mars.  Their connection to Mars is never mentioned onscreen, though creator/executive producer Greg Strangis has stated in an interview that the aliens used Mars only as a staging point to launch their invasion on Earth; the veterans of the Grover's Mill militia obliviously call them Martians.

Dora the Explorer: Journey to the Purple Planet: Dora the Explorer: Journey to the Purple Planet is an 2005 action-adventure video game based on the television series "Dora the Explorer", developed by Monkey Bar Games, published by Global Star Software and powered by Vicious Engine.  The game was released for GameCube in North America on October 13, 2005, and later in PAL regions on December 16, 2005.  The PlayStation 2 version was released on PAL regions on December 2, 2005, and later in North America in February 9, 2006.  An Xbox version was planned, but was cancelled.  Based on the show, the game is about Dora who has a task to complete or a place to reach with her monkey, Boots.  Dora has three, or, in some double-length episodes, four, places to go, with the final place as the destination.  The game is about Dora and Boots who find some lost aliens from the purple planet.  However, to take them home, she and Boots are required to collect keys to open the space gate, leading to the planet Saturn.  To fuel the rocket ship loaned to them, Dora and Boots need to collect 10 space gems in a level.

Martian: A Martian is a native inhabitant of the planet Mars.  Although the search for evidence of life on Mars continues, many science fiction writers have imagined what extraterrestrial life on Mars might be like.  Some writers also use the word "Martian" to describe a human colonist on Mars.

X-Day (Church of the SubGenius): X-Day is a traditional part of the Church of the SubGenius, a religion formed as a parody of cults and extreme religious groups, and their pamphlets and claims.  X-Day fell on July 5, 1998, the scheduled "end of the world", and has been celebrated on July 5 each year since then.  From its inception in 1980, the Church had prophesied that an army of alien invaders (known as the "X-ists" or "Men From Planet X") would land on the planet Earth and destroy the world of "normals", "pinks", and "glorps," while the members of the Church of the SubGenius would be rescued by the aliens and taken away into space.  Chapters 10 and 11 of "Revelation X: The "Bob" Apocryphon" supplies additional details as to the precise kinds of fates which supposedly await the "pinks" and "normals" (as well as SubGenii who have not paid their membership fees) left behind when X-Day comes, saying, among other things, that those who are not immediately killed by the aliens will be enslaved by a society of evil clowns known as the "Bozo Cult" until eventually their souls are devoured by the Elder Gods.  The book also tells readers that if they want more information, they should send one million dollars to Ivan Stang so that he can remake his 1973 film "Let's Visit the World of the Future".

Supporting paragraphs: Henry Olerich Martian
Answer: Mars