Glossary about universe meaning of

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Glossary about universe meaning of

GLOSSARY ABOUT THE UNIVERSE

ASTEROID IT IS A SMALL ROCKY BODY WHICH IS NEAR OTHER BODIES ROTATING AROUND A STAR.
ASTRONOMICAL UNIT IT IS THE UNIT TO MEASURE LENGTH WITHIN THE SOLAR SYSTEM AND IT IS EQUAL TO
THE AVERAGE DISTANCE FROM THE EARTH TO THE SUN. IT IS EQUAL TO 150 MILLION KILOMETERS
COMET IT IS A CELESTIAL BODY, RELATIVELY SMALL IN SIZE AND MADE UP OF ROCKY MATERIAL, COSMIC DUST, ORGANIC MOLECULES AND ICE. THEY ARE VISIBLE WHEN THEY APPROACH THE SUN BECAUSE ITS HEAT VAPORIZES THE FROZEN CORE AND THE COMET RELEASES JETS OF GAS AND DUST WHICH LEAVE A SPECTACULAR TAIL.
DWARF PLANETS THEY ARE CELESTIAL BODIES THAT ORBIT THE SUN AND IS MASSIVE ENOUGH TO ASSUME A NEARLY SPHERICAL SHAPE.
GALAXIES AR E ENORMOUS ACCUMULATIONS OF MATTER IN THE FORM OF COSMIC DUST, NEBULAE AND STARS AND SOME OF THEM MAY POSSES PLANETARY SYSTEMS. THEIR COMPONENTS STAY TOGETHER BECAUSE OF THEIR POWERFUL GRAVITATIONAL FORCES. THERE ARE DIFFERENT TYPES: ELLIPTICAL, SPIRAL OR IRREGULAR
LIGHT YEAR IS THE DISTANCE LIGHT TRAVELS IN ONE YEAR.
METEORITE IS A ROCKY BODY ORIGINATING FROM ASTEROIDS, COMETS OR OTHER MATTER IN THE UNIVERSE.
NEBULA IS AN INTERSTELLAR CLOUD OF DUST, HYDROGEN, HELIUM AND OTHER IONIZED GASES.
ORBIT IS THE PATH OF A CELLESTIAL BODY OR AN ARTIFICIAL SATELLITE WHICH REVOLVES AROUND ANOTHER BODY.
PLANET IS A CELESTIAL BODY THAT HAS CLEARED OR COMPLETED ITS ORBIT.
PLANETARY DAY IS THE TIME IT TAKES A PLANET TO ROTATE COMPLETELY AROUND ITS OWN AXIS
PLANETARY SYSTEM IS A GROUP FORMED BY A STAR AND CELESTIAL BODIES ROTATING AROUND IT.
PLANETARY YEAR IS THE LENGTH OF TIME IT TAKES A PLANET TO ROTATE AROUN ITS STAR.
REVOLUTION IS THE MOVEMENT OF AN OBJECT AROUND ITS STAR.
ROTATION IS THE MOVEMENT OF A PLANET WHEN IT ROTATES ITSELF.
ROTATION AXIS IS THE IMAGINARY LINE ON WHICH A PLANET ROTATES.
SATELLITE IS A CELESTIAL BODY THAT ROTATES AROUND THE PLANETS.
SOLAR SYSTEM IS A PLANETARY SYSTEM WHICH CONSISTS OF THE SUN, 8 PLANETS, THEIR MOONS, AND OTHER CELESTIAL OR NON-CELESTIAL BODIES.
STAR IS A CELESTIAL BODY FORMED BY HUGE QUANTITIES OF GASES, SUCH AS HYDROGEN AND HELIUM.
SUN IS A STAR THAT IS IN THE CENTER OF THE SOLAR SYSTEM AND SUSTAINS LIFE ON EARTH AS IT IS THE SOURCE OF ENERGY.

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