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Hace 19 horas · SN 1994D (bright spot on the lower left), a type Ia supernova within its host galaxy, NGC 4526. A supernova (pl.: supernovae or supernovas) is a powerful and luminous explosion of a star.A supernova occurs during the last evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion.The original object, called the progenitor, either collapses to a ...
Hace 19 horas · A woman selling produce at a market in Lilongwe, Malawi. Food security is the state of having reliable access to a sufficient quantity of affordable, nutritious food.The availability of food for people of any class, gender or religion is another element of food security. Similarly, household food security is considered to exist when all the members of a family, at all times, have access to ...
