turtlebot_rviz_launchers without running turtlebot

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Hello,

I try to simulate a turtlebot, because the batteries for my turtlebot were not delivered and I'm waiting for them now. Running a Gazebo world works fine with the following line: roslaunch turtlebot_gazebo turtlebot_world.launch

However, when I try to run Rviz with the following line: roslaunch turtlebot_rviz_launchers view_robot.launch

It gives me an error that says: [view_robot.launch] is neither a launch file in package [turtlebot_rviz_launchers] nor is [turtlebot_rviz_launchers] a launch file name

What is the reason for this? Do I have to install the packages in some way or do I need a running turtlebot in order to run Rviz?