Glossary of Solar System




Glossary of Solar System :


atmosphere : layer of goses surrounding a planet


axis : an imaginary line which passes through a planet from the North to the South Pole


core : the central part of a planet


crater : a hollow resulting from the collision of an object with a planet


dwarf star : a smaller-sized star (our Sun is a yellow dwarf star)


elliptical : the shape of an oval


gamma rays : high-energy waves that come from a radioactive source


gravity : the force that attracts all bodies in the Universe to each other


greenhouse effect : the heating that occurs when gases trap heat and stop it from escaping a planet's atmosphere


hemisphere : one half of a planet


Kuipcr Belt : disk-shaped region of minor planets and ice outside the orbit of Neptune


mass : the amount of matter in an object


meteorite : piece of metal or stone from outer spoce that has reached Earth


nuclear reaction : collision of atoms giving off energy


orbit : the path that on object makes around another object


proximity : closeness between two objects


radiates : giving off heat or light


radiation : the release of energy in the form of waves or rays


revolution : the movement of a heavenly body in an orbit around another heavenly body


rotation : turning round ond round like o wheel


satellite : an object that revolves around o planet


sulphuric acid : a strong mineral acid


ultraviolet : invisible rays in sunlight


waning : getting smoller


water ice : water frozen in the solid state


waxing : getting bigger


Glossary of Solar System :







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