To determine how far the radio waves traveled in space in meters, we can use the fact that radio waves travel at the speed of light.
The speed of light is approximately 299,792,458 meters per second.
Given that the radio waves traveled for 15 minutes, we need to convert minutes to seconds. There are 60 seconds in a minute.
So, the total time the radio waves traveled is 15 minutes x 60 seconds/minute = 900 seconds.
To find the distance traveled, we can multiply the speed of light by the time:
299,792,458 meters/second x 900 seconds = 269,813,212,200 meters.
Therefore, the radio waves traveled approximately 269,813,212,200 meters into space.