A coronagraph is a specialized telescope designed to observe the Sun's corona, the outer atmosphere that is usually obscured by the bright light of the Sun itself. By blocking out the Sun's direct light, coronagraphs allow scientists to study solar phenomena such as solar flares and coronal mass ejections, which can impact space weather and satellite operations. These instruments are crucial for understanding the Sun's behavior and its effects on the Earth. Coronagraphs can be ground-based or space-based, with notable examples including the SOHO (Solar and Heliospheric Observatory) and the SDO (Solar Dynamics Observatory), both of which provide valuable data for solar research.