The term "spectrohelioscope motion-picture" refers to a device used to observe the sun and its activities. Some synonyms for this particular term may include solar telescope, solar spectroscope, and heliograph. A solar telescope is a device that helps in observing the sun's surface and its activities. A solar spectroscope is used to study the spectrum of the sun, while a heliograph is a device used for taking pictures of the sun. These synonyms may all refer to tools used by astronomers to study the sun and its various phenomena. Each one provides a unique perspective for studying the celestial body that is so important to life on Earth.