planet

A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals. The term planet is ancient, with ties to history, astrology, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate objects. In 2006, the International Astronomical Union (IAU) officially adopted a resolution defining planets within the Solar System. This definition is controversial because it excludes many objects of planetary mass based on where or what they orbit. Although eight of the planetary bodies discovered before 1950 remain "planets" under the modern definition, some celestial bodies, such as Ceres, Pallas, Juno and Vesta (each an object in the solar asteroid belt), and Pluto (the first trans-Neptunian object discovered), that were once considered planets by the scientific community, are no longer viewed as such. The planets were thought by Ptolemy to orbit Earth in deferent and epicycle motions. Although the idea that the planets orbited the Sun had been suggested many times, it was not until the 17th century that this view was supported by evidence from the first telescopic astronomical observations, performed by Galileo Galilei.
the solar system - the solar system with the planets
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the solar system

Added month ago by MANU

52

View from space - colorful jigsaw puzzle
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View from space

Added 3 months ago by andi

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landscape - colorful puzzle jigsaw
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landscape

Added 4 months ago by natalia

157

Landscape - colorful puzzle-puzzle
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Landscape

Added 4 months ago by andi

210

pets and animals - beautiful animals and even more beautiful
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pets and animals

Added year ago by żaba

20

map - night sky map and zodiac signs
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map

Added year ago by skorpion

65

Fantastic - colorful puzzle jigsaw
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Fantastic

Added year ago by andi

90

SISTEMA SOLARE - e il sistema che comprende il sole come stella e and pianeti che gli girano intorno
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SISTEMA SOLARE

Added year ago by maestra

28

naturacielo - nature, universo, calf.
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naturacielo

Added year ago by vale

56

Abstraction - complicated puzzle
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Abstraction

Added year ago by andi

12

Abstraction - complicated puzzle
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Abstraction

Added year ago by andi

47

cosmos, mars - landscape of the cosmos earth mars
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cosmos, mars

Added year ago by Marti

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asteroid - the asteroid nearly hit the ground
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asteroid

Added year ago by Marti

164

nebulosa - nebulosa del granchio
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nebulosa

Added year ago by carla

163

Earth Day - Earth Day - solve my puzzles and take care of the planet
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Earth Day

Added year ago by Bartek

210

Il sistema solare - Objects orbiting the Sun are divided into three groups: planets, dwarf planets and small bodies of t
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Il sistema solare

Added year ago by aldona

30 1

Beautiful night - Road in the glow of the moon
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Beautiful night

Added year ago by ewunia x

202

full moon - mountains in the moonlight
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full moon

Added year ago by ewunia x

247

World Map - puzzles - A world map in the form of a puzzle
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World Map - puzzles

Added year ago by Michał

105 1

Earth Day poster - Arrange a poster for the Earth Day.
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Earth Day poster

Added year ago by PIOTR

63

earth day 2017 - Earth day solve my puzzle
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earth day 2017

Added year ago by szymon

219

earth day23 - Earth day - take care of nature
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earth day23

Added year ago by krzyś

51 1

Earth day-puzzle - put together a fun puzzle; p
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Earth day-puzzle

Added year ago by Oliwka

68

Earth Day - Set up a fun puzzle: D
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Earth Day

Added year ago by Natalia Andrzej

75 2

Earth 1 - We put the puzzle together.
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Earth 1

Added year ago by Adam O

71

Earth Day 2017 - earth day 2017. put together a puzzle
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Earth Day 2017

Added year ago by Mateusz

54 2

Earth Day - Earth Day . put together a puzzle
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Earth Day

Added year ago by Mateusz

22 3

Earth Day - Earth Day - solve the puzzle
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Earth Day

Added year ago by Julka

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Earth Day - Earth day, place a puzzle.
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Earth Day

Added year ago by Julek

51 2

Earth Day - Earth Day - solve the puzzle
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Earth Day

Added year ago by Izabela

150 1

solar system - The sun in the center and around the planet. Copernicus once discovered it, nothing but create a puz
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solar system

Added year ago by julka

221 2