Pluto

                                       Pluto               In 1930, Pluto was classified as a plane

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Stars

                                                        Stars The color of a star you can see how h

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Galaxies

                                           Galaxies With the Hubble Space Telescope, scientists have found a very old galaxy. Or very yo

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Venus

                                                                   Venus V

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Planets

                                                                      &n

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Mars

History: Since ancient times is Mars, the red planet, closely monitored by humans. His blood-red color made him many civilizations associated with war. Thus, the planet came also to his name: Mars is the Roman god of war. In the 17th century

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ozone layer

Ozone depletion: causes and effects The ozone layer protects the earth from excessive irradiation of ultraviolet (UV) light. Influenced by the emission of substances such as chlorofluorocarbons (CFCs) and halons has decreased the thickne

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