An object older than Earth has been found in the Sahara Desert. The meteorite discovered last year in the Sahara Desert is estimated to be about 4.56 billion years old. The age of the Earth is 4.54 billion years. The...
Galaxies can be classified into three main types: elliptical, spiral, and irregular. Hubble's morphological classification is a more detailed taxonomic method. Since the Hubble method classifies galaxies only on the basis of shape, it ignores the rate of star formation...
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