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In linguistics, an adjective is a word that modifies a noun or noun phrase or describes its referent. Its semantic role is to change the information given by the noun. Traditionally, adjectives were considered one of the main parts of speech of the English language, although historically, they were classed together with nouns. Nowadays, certain words that usually had been classified as adjectives, including the this, my, etc., typically are classed separately as determiners.

An adverb is a word or an expression that modifies a verb, adjective, another adverb, determiner, clause, preposition, or sentence. Adverbs typically express manner, place, time, frequency, degree, level of certainty, etc., answering questions such as how? in what way? When? Where? and to what extent?.

Aerospace is a term used to collectively refer to the atmosphere and outer space. Aerospace activity is very diverse, with a multitude of commercial, industrial and military applications. Aerospace engineering consists of aeronautics and astronautics. Aerospace organizations research, design, manufacture, operate, or maintain aircraft and spacecraft.

The beginning of space and the ending of the air is considered as 100 km (62 mi) above the ground according to the physical explanation that the air pressure is too low for a lifting body to generate meaningful lift force without exceeding orbital velocity.
 

The Age of Discovery, or the Age of Exploration, is an informal and loosely defined term for the early modern period approximately from the 15th century to the 18th century in European history, in which seafaring Europeans explored regions across the globe, most of which were already inhabited. The extensive overseas exploration, led by the Portuguese and the Spanish, emerged as a powerful factor in European culture, most notably the European encounter and colonization in the Americas.