 The 1910 appearance of Halley's Comet inspired the young child's life-long interest in astronomy.When Heinlein graduated from Central High School in Kansas City in 1924, he aspired to a career as an officer in the United States Navy.However, he was initially prevented from attending the United States Naval Academy at Annapolis because his older brother Rex was a student there, and regulations discouraged multiple family-members from attending the Academy simultaneously.