import java.util.Scanner;
public class SpaceExpedition {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String destination = "Mars";
System.out.println("Welcome to the space expedition tracker!");
System.out.println("Your journey through the solar system awaits.");
while (true) {
System.out.println("\nCurrent location: Earth");
System.out.print("Next destination: " + destination + " (Enter 'go' to continue or 'return' to go back to earth): ");
String input = scanner.nextLine();
if (input.equalsIgnoreCase("go")) {
if (destination.equals("Mars")) {
System.out.println("\nApproaching Mars...");
System.out.println("Beware of a small asteroid field ahead! Navigating...");
System.out.println("Successfully reached Mars! Here's a view of Olympus Mons, the largest volcano in the solar system.");
destination = "Jupiter";
} else if (destination.equals("Jupiter")) {
System.out.println("\nApproaching Jupiter...");
System.out.println("Fuel levels are critically low. Managing fuel...");
System.out.println("Successfully reached Jupiter! Enjoy the stunning view of the Great Red Spot.");
destination = "Saturn";
} else if (destination.equals("Saturn")) {
System.out.println("\nApproaching Saturn...");
System.out.println("Navigating through Saturn's rings...");
System.out.println("Successfully reached Saturn! Observe the beautiful and mysterious hexagonal storm at its north pole.");
destination = "Uranus";
} else if (destination.equals("Uranus")) {
System.out.println("\nApproaching Uranus...");
System.out.println("Avoiding icy debris...");
System.out.println("Successfully reached Uranus! Take a look at the planet's unusual rotation axis.");
destination = "Neptune";
} else if (destination.equals("Neptune")) {
System.out.println("\nApproaching Neptune...");
System.out.println("Navigating through strong winds...");
System.out.println("Successfully reached Neptune! Neptune's Great Dark Spot is a sight to behold.");
destination = "Pluto";
} else if (destination.equals("Pluto")) {
System.out.println("\nApproaching Pluto...");
System.out.println("Maintaining navigation in the Kuiper Belt...");
System.out.println("Successfully reached Pluto! Here's a glimpse of its heart-shaped feature, Tombaugh Regio.");
destination = "return";
}
} else if (input.equalsIgnoreCase("return")) {
if (destination.equals("return")) {
System.out.println("\nReturning to Earth...");
System.out.println("Thank you for exploring the solar system with us!");
break;
} else {
System.out.println("\nInvalid input. Please enter 'go' or 'return'.");
}
} else {
System.out.println("\nInvalid input. Please enter 'go' or 'return'.");
}
}
scanner.close();
}
}