 What can be inferred from the passage about Jorgensen's Worlds?
They're called Jorgensen's Worlds, and in themselves are of no importance whatever. Since they've met no opposition so far in their infiltration of Terrestrial space, they intend to seize Jorgensen's Worlds by force." Unfortunately, Jorgensen's Worlds are technologically undeveloped areas. "I have here," he said solemnly, "information which will change that picture completely." "If it's trapped for destruction, I suppose—" "I've heard of these Jorgensen's Worlds," Retief said. Overall policy calls for a defense of these backwater worlds. II Retief put down the heavy travel-battered suitcase and leaned on the counter, studying the schedules chalked on the board under the legend "ALDO CERISE—INTERPLANETARY."
 Tourists are no longer welcome and travel has been halted.
 It's difficult to locate and makes travel rather uncommon  Tourists are no longer welcome and travel has been halted.  It's existence is only known as top-secret so there is no information about it.  Ships are unable to land due to too many tourists