Adaptive selling can be an expensive strategy to use in retail, and thus is typically found in more upscale stores.The higher level of personalization requires better-trained personnel who are more costly. selling strategy in which the way a product or service is presented varies according to the type of consumer viewing it.
The main tools used by astronomers are telescopes, spectrographs, spacecrafts, cameras, and computers. Astronomers use many different types of telescopes to observe objects in the Universe. Some are located right here on earth and some are sent into space. Just about everything we know about the Universe comes from the study of the light emitted by objects in space. Astronomers use these tools (especially telescopes) very often. Astronomers also use a lot of physics and mathematics in their work.
A scientist who studies the objects in the sky, including planets, galaxies, black holes, and stars, is called an astronomer. These days, the terms astronomer and astrophysicist are used interchangeably, to talk about any physicist who specializes in celestial bodies and the forces that affect them. Astronomers use telescopes and cameras to observe the stars and other objects in the sky, and they often use complicated math to make predictions and solve puzzles about their movements and locations. The Greek root, astronomia, literally means star arrangement..