telescope or to viwe earth its a satelite There are also probes which actually land on the planet and lets you "observe" in more ways than just looking from a distance. Also, and this falls under the above answer, there are radio telescopes that observe the radio waves coming from planets.
Scientists use telescopes to observe and study objects in the sky, such as stars, planets, galaxies, and other celestial bodies. Telescopes allow scientists to gather important data, study the properties and behavior of these objects, and make new discoveries about the universe.
telescope
A spectrometer is used to determine the composition of stars, and how fast they are going relative to Earth.
In earlier times, scientists primarily relied on sky gazing to observe heavenly objects. Later telescopes were made use of. Today we have a huge network of telescopes based both on earth and its orbit constantly observing the sky.
Scientists who study the Universe are called astronomers. They use telescopes and other instruments to observe and analyze celestial objects like stars, planets, galaxies, and black holes. Some astronomers also study the fundamental forces and laws that govern the Universe.
The instrument scientists use to observe the planets is a high powered telescope.
telescope
They used a telescope
Scientists use telescopes to observe and study objects in the sky, such as stars, planets, galaxies, and other celestial bodies. Telescopes allow scientists to gather important data, study the properties and behavior of these objects, and make new discoveries about the universe.
telescope
Based on things, they use everything. Scientists observe then say what they think.
Some scientists use a instrument called a tele scope i think
Galileo
An observatory is a room containing telescopes for studying planets. These facilities are typically equipped with advanced instruments and technology to observe celestial bodies in detail. Scientists use observatories to conduct research on planets, stars, and other astronomical phenomena.
Use a plankton net.
well you can use a microscope
Tools enable scientists to make more accurate observations, and to observe things that they otherwise could not observe. For example, microscopes allow scientists to observe bacteria, which otherwise are too small to see.