It's about the number of Union Stations in the United States
(a.k.a. Union Terminal; a.k.a. Joint Station; a.k.a. Union Depot) (2016 figures)
Typically shared between multiple railroad companies and stations, there are about 135 "Union Stations" in the United States. Of these, the busiest station is Chicago Union Station, which handles 120,000 passengers each year.
It's about nine-tenths the number of Moons in our Solar System
In other words, 135 is 0.9250 times the count of Moons in our Solar System, and the count of Moons in our Solar System is 1.08 times that amount.(2015 figures) (confirmed moons only; dwarf planet satellites not included)
Astronomers and other scientists have confirmed the presence of 146 moons orbiting the major planets of our Solar System. About one third of those moons — 53 — are in orbit around the planet Saturn
It's about one-and-one-tenth times the number of Elements on the Periodic Table
In other words, 135 is 1.140 times the count of Elements on the Periodic Table, and the count of Elements on the Periodic Table is 0.8770 times that amount.(a.k.a. Periodic Table of the Elements, a.k.a chemical elements) (confirmed elements as of 2016)
It's about one-and-three-tenths times the number of Wolves in Yellowstone National Park
In other words, the count of Wolves in Yellowstone National Park is 0.7690 times 135.(a.k.a. Henihco'oo; a.k.a. Héetíhco'oo) (December 2014 figures; Wyoming Park area)
As of the 2014 population count, there were 104 wolves living in Yellowstone National Park, in twelve packs. All of the wolves now living in the Park are thought to have descended from the 66 wolves (re)introduced into the Park in 1995-96.
It's about three-fourths the number of John Wayne films
In other words, 135 is 0.7580 times the count of John Wayne films, and the count of John Wayne films is 1.320 times that amount.(a.k.a. "Duke", a.k.a. JW, a.k.a. Marion Mitchell Morrison, a.k.a. Marion Robert Morrison, a.k.a. Duke Morrison) (films starring the actor in any size role)
Known for his distinctive voice and walk, Oscar-winning Western actor John Wayne appeared in 178 films between 1926 and 1976. He was said to have the lead role in 142 of those films.
It's about one-and-a-half times the number of Keys on a Piano
It's about two-thirds the number of Bones in the Human Body
In other words, 135 is 0.6550 times the count of Bones in the Human Body, and the count of Bones in the Human Body is 1.530 times that amount.(adult, excluding sesamoid bones and ossicles)