A "flare" is a bright, sudden burst of light or energy, often used as a signal or warning. Flares can be found in various contexts, such as in emergency situations where they help guide rescuers or alert others to danger. They are typically made of combustible materials that produce a bright flame when ignited. In astronomy, a solar flare refers to a sudden explosion on the surface of the Sun that releases a large amount of energy. These flares can affect space weather and may disrupt communication systems on Earth. Solar flares are closely monitored by scientists to understand their impact on our planet.