Space agencies are organizations responsible for the planning, development, and execution of space missions. They conduct research, develop technology, and launch spacecraft to explore outer space. Some well-known space agencies include NASA in the United States, ESA in Europe, and Roscosmos in Russia. These agencies often collaborate on international projects to advance our understanding of space. In addition to exploration, space agencies also focus on satellite technology, which is crucial for communication, weather forecasting, and navigation. They work on various scientific missions, such as studying planets, asteroids, and the effects of space on human health.