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Unsure why getting empty topics and services for Gazebo run through ROS Hydro

I was following the instructions on here: http://gazebosim.org/wiki/Tutorials/1.9/Installing_gazebo_ros_Packages#Testing_Gazebo_with_ROS_Integration and everything was working fine with loading an empty environment. I launched with

roscore & rosrun gazebo_ros gazebo

However, when I checked rostopic list, I only got /rosout /rosout_agg in return. Similarly, when checking rosservice list, I only got /rosout/get_loggers /rosout/set_logger_level instead of the list of gazebo topics and services.

I realized that it said the instructions were for 1.9 and when I checked my version it said I'd installed 2.0. Is 1.9 the latest that's compatible with ROS Hydro? I'm running ROS Hydro and Ubuntu 12.04.