/**
 * This function adds an exoplanet name to the planetList.
 *
 * @param planetList A list of celestial bodies
 * @param exoplanetName The name of the exoplanet to be added
 * @return The updated planetList with the exoplanet added
 */
fun addExoplanet(planetList: MutableList<String>, exoplanetName: String): List<String> {

    // Append the exoplanet name to the planetList
    planetList.add(exoplanetName)
    
    return planetList
}
/**
 * This function adds an exoplanet name to the planetList.
 *
 * @param planetList A list of celestial bodies
 * @param exoplanetName The name of the exoplanet to be added
 * @return The updated planetList with the exoplanet added
 */
fun addExoplanet(planetList: MutableList<String>, exoplanetName: String): List<String> {
/**
 * This function adds an exoplanet name to the planetList.
 *
 * @param planetList A list of celestial bodies
 * @param exoplanetName The name of the exoplanet to be added
 * @return The updated planetList with the exoplanet added
 */
fun addExoplanet(planetList: MutableList<String>, exoplanetName: String): List<String> {

    // Append the exoplanet name to the planetList
    planetList.add(exoplanetName)
    
    return planetList
}