Each month in “Slice of History” we feature a historical photo from the JPL Archives. See more historical photos and explore the JPL Archives at https://beacon.jpl.nasa.gov/.
This artist’s conception of the Magellan spacecraft was created in about 1983, when it was known as Venus Radar Mapper (VRM). This kind of artwork was usually based on reports and drawings provided to the artist by the project staff. By the time Magellan was launched in May 1989 aboard the space shuttle Atlantis, the configuration had changed. It was not an uncommon occurrence for the design of a spacecraft to evolve over a period of months or years, based on input from the various instrument teams and engineers working on the project. It also happened when projects encountered funding problems and were scaled down in order to meet a budget.
One 1984 VRM project document explained, “The details of the configuration of the VRM spacecraft are changing continually as the spacecraft design matures. This illustration [a line drawing that matches the configuration shown in this artwork] shows the general configuration of the VRM spacecraft …. However several details of this illustration are out of date (such as the FEM length, altimeter antenna design and placement, and the amount of STAR-48 support structure retained after VOl).” Other, less detailed drawings were quickly added to the report to show the recent updates.