sentences:  It then travels northward to its northern terminus at NM 130.NM 6563 is one of only three four-digit state highways in New Mexico (the others being NM 1113 and NM 5001).It takes its number from the wavelength of the Hydrogen-alpha spectral line (6563 Å) used by scientists at the observatory to study the solar chromosphere and to locate solar flares on the Sun.