In astronautics and astronomy, Ralph is a scientific instrument aboard the New Horizons, a NASA spacecraft launched in 2006. Ralph is an image sensor and spectrometer, sensitive to electromagnetic radiation in the visible light and infrared range, and is used to generate images of astronomical objects (astrophotography). Ralph has two major subinstruments, LEISA and MVIC. MVIC stands for Multispectral Visible Imaging Camera and is a color imaging device, while LEISA originally stood for Linear Etalon Imaging Spectral Array and is an infrared imaging spectrometer for spaceflight. LEISA observes 250 discrete wavelengths of infrared light from 1.25 to 2.5 micrometers. MVIC is a pushbroom scanner type of design with seven channels, including red, blue, near-infrared (NIR), and methane.