NASA is a public sector which means that their main motive is not to earn money but to do work which benefits the society. As compare to public and private companies or any these type of business, a public sector company do also required to have a logo design. This logo design is used for other than just marketing and branding purposes. For example, the companies like NASA use their logo design in press conference or when they issue statement on their website or printing media for public interest. So, having an attractive and profession logo design is an equal requirement of public sector Company like NASA.
NASA logo design was first launched in 1915 when NASA officially starts working on different discoveries around the universe but it was not launched as NASA but as NACA (National Advisory Committee for Aeronautics). In 1958, the NACA was officially changed into NASA. The second NASA logo design was also redesigned in the same year. In this logo design NASA has includes the illustration of Sun and Earth. While this logo design is still in usage of NASA but 1974 NASA has removed all the graphics in their logo design and comes up with simple NASA text only logo design.
In 1992. NASA logo design was once again changed. This is the current logo design of NASA. You can download present NASA logo design in PNG format below with transparent background.