eclipse - a situation in which the Sun is covered by the Moon, or the Moon is covered by the Earth's shadow, light-year - the distance that light travels in one year, rotate - to turn in a circular direction, or to make something turn in a circular direction, average-sized - of a similar size to most others, not very large or very small, galaxy - a very large group of stars held together in the Universe, breakthrough - an important discovery or event that helps to improve a situation or provide an answer to a problem,

What is Your Picture of the Universe

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