John Jacob Astor was an American businessman, real estate builder, investor, inventor, and writer which had an estimated and adjusted for inflation net worth of $121 billion.

John Jacob Astor was the writer behind A Journey in Other Worlds. The said novel is about the life in the year 2000 on planets Saturn and Jupiter and it was published in 1894.

Aside from being a writer, he explored the world of inventions wherein he did bicycle brake in 1898, a vibratory disintegrator, a pneumatic road-improver, and he develop a turbine engine.

In 1897, he built the luxurious Astoria Hotel in New York City. The said establishment adjoined his cousin's Waldorf Hotel is now known as Waldorf-Astoria Hotel.

During the period of 1894 to 1896, he worked as the staff of Governor Levi P. Morton. He financed the volunteer artillery unit known as the Astor Battery which it used in the Philippines.

He became the lieutenant colonel in the U.S. Volunteers. He also served as a staff in Cuba. He was entitled to the Spanish Campaign Medal.

John Jacob Astor IV was born on July 13, 1864 in Rhinebeck, New York. He studied at Harvard University. He had two children from his previous marriage to socialite Ava Willing. He died boarding the RMS Titanic on April 15, 1912.