Astronomy #5: Astronomy Tools

“Astronomers use observatories equipped with powerful telescopes that help them magnify the view of dim and distant objects in the universe. Astronomy tools, like the armillary sphere, were used by early astronomers and new tools came about as the study of astronomy evolved. They also use instruments called spectrographs that dissect the light from stars, planets, galaxies, and nebulae, and reveal more details about how they work. Specialized light meters (called photometers) help them measure the varying stellar brightnesses. Well-equipped observatories are scattered around the planet. They also orbit high above Earth’s surface, with such spacecraft as Hubble Space Telescope providing clear images and data from space. To study distant worlds, planetary scientists send spacecraft on long-term expeditions, Mars landers such as Curiosity, Cassini Saturn mission, and many, many others. Those probes also carry instruments and cameras that provide data about their targets.”

Source: https://www.thoughtco.com/astronomy-101-3071080

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