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The night sky is different at different times of the year. You see different constellations every now and then. This change is due to the motion of the Earth in its orbit around the Sun. Each day a few stars are visible in the east that were not visible the night before.
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The Library must be concerned not only with selecting appropriate items to add, but also with removing materials which have become obsolete or which no longer meet the criteria for inclusion in the collection. This process is known as deselection or weeding.
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HOPE IT HELPS
It would be six because of the rithum
As the space expanded, big bang happened and resulted to the formation of protons, electrons, and neutrons through nuclear fusion that scattered like fog in the universe. During the fusion, the sun and other stars generate heat and light. The light elements break up into dense plasma and the temperature cooled, which form matter.
In addition, nuclear fusion create a reaction in which two or more atomic nuclei are combined such as protons and neutrons collided to make deuterium, an isotope of hydrogen and when deuterium combined, it will make helium.
