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There are eight planets, which can also be loosely descibed as major planets. Below that there are dwarf planets and then minor planets, also know as asteroids.
Scientists predict that they are planets because there wouldn't be random gas' from unknown places
The Telescope
They believe the planets formed from a disc of gas and dust called a "protoplanetary disc".
1 microlensing !
It has helped the scientists predict the weather, learn how the planets actually are, and understand what space actually is.
They are gas planets
Carbon.
Studying the earth helps scientists to understand other planets since the earth is part of the solar system. Scientists use the features of the earth to compare them with what other planets hold.
what molecule do scientists look for when they are investigsating the possibility of life on other planets
Telescope
scientists who found them
The Voyager space probe provides scientists with information on gaseous giant planets.
The result of exploration would be discovery and advancement, and that could range from exploration of a jungle thus finding some ruins or space exploration in order to discover life on other planets.
Human curiosity to conquer planets and other spheres scientists persuaded instead of a successor to the space to be able to send human exploration operation he was here that the Construction and Development robot began.
Robert M. Powers has written: 'Planetary encounters' -- subject(s): Astronautics, Exploration, Planets 'Mars' -- subject(s): Exploration, Life on other planets
Astrologers study the relationships of the planets in accordance to each other as well as Earth, and how they affect humans. Astronomers study the physical properties of planets, as well as space exploration.