Exoplanets are planets that orbit distant stars outside our solar system. They resemble the planets in our solar system but vary greatly in size, composition, and distance from their host star. The habitable zone is the region around a star where temperatures are such that liquid water can exist on a planet's surface—a fundamental requirement for life as we know it. The first exoplanet was detected in 1992. In recent years, the number of detections has increased exponentially. As of July 14, 2024, 6,911 exoplanets in 4,941 systems were known (NASA). These figures demonstrate that it is normal for stars to have planets. Exoplanet detection involves, for example, measuring a star's luminosity over time. If this luminosity decreases cyclically, it can be assumed that a planet is passing in front of or orbiting the star. This is a particularly interesting moment for science, and ideally, the JWST, humanity's most advanced telescope, can peer into the planet's atmosphere for more detailed analysis. Observing Earth from a distant star system also presents the perfect opportunity to send our message.