southern edge of the launch pad. Each bears the name of one of the astronauts and his military service insignia. Stars, landmarks on the Moon and Mars Apollo astronauts frequently aligned their spacecraft inertial navigation platforms and determined their positions relative to the Earth and Moon by sighting sets of stars with optical instruments. As a practical joke, the Apollo1 crew named three of the stars in the Apollo catalog after themselves and introduced them into NASA documentation. Gamma Cassiopeiae became Navi – Ivan (Gus Grissom's middle name) spelled backwards. Iota Ursae Majoris became Dnoces – "Second" spelled backwards, for Edward H. White II. And Gamma Velorum became Regor – Roger (Chaffee) spelled backwards. These names quickly stuck after the Apollo1 accident and were regularly used by later Apollo crews. Craters on the Moon and hills on Mars are named after the three Apollo1 astronauts. Civic and other memorials Three public schools in Huntsville, Alabama (home of George C. Marshall Space Flight Center and the U.S. Space & Rocket Center): Virgil I. Grissom High School, Ed White Middle School, and the Chaffee Elementary School. Ed White II Elementary e-STEM (Elementary-Science, Technology, Engineering and Math) Magnet school in El Lago, Texas, near the Johnson Space Center. White lived in El Lago (next door to Neil Armstrong). There are Grissom or Virgil I. Grissom middle schools in Mishawaka, Indiana, Sterling Heights, Michigan, and Tinley Park, Illinois. Virgil Grissom Elementary School in Princeton, Iowa, and the Edward White Elementary School in Eldridge, Iowa, are both part of the North Scott Community School District also naming the other three elementary schools after astronauts Neil Armstrong, John Glenn, and Alan Shepard. School #7 in Rochester, New York, is also known as the Virgil I. Grissom School. In the early 1970s, three streets in Amherst, New York, were named for Chaffee, White and Grissom. By 1991, when no homes had been built on Grissom Drive, the area was repurposed as commercial property; the Grissom street sign was removed and the street renamed Classics V Drive for the banquet hall that occupied the land. The THUMS Islands, four man-made oil drilling islands in the harbor off Long Beach, California, are named Grissom, White, Chaffee and Theodore Freeman. The Roger B. Chaffee Planetarium is located at the Grand Rapids Public Museum. Roger B. Chaffee Memorial Boulevard in Wyoming, Michigan, the largest suburb of Grand Rapids, Michigan, which is