Given the task definition and input, reply with output. In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].

Using 110 years of Billboard chart data, designers have created a stunning and mesmerising website that reveals how long it would take popular tracks to travel through the universe. Called Lightyear.fm, it is based on the premise that the radio waves travel at the speed of light, so if you were one light year away from Earth you’d only just be hearing songs released a year ago. The planets in our solar system are mere light-minutes from Earth - meaning many would be receiving broadcasts made this year from the likes of Taylor Swift and The Weeknd - but as Lightyear.fm journeys beyond our system and into the depths of the Milky Way classic tunes echo around.Lightyear.fm was created by computer designers Brian Moore, Mike Lacher, Chris Baker and Mikhail ChernovRadio waves travel at the speed of light and songs that are one light year from Earth were released a year agoUsing Billboard chart data from The Whitburn Project, project worked out the best-selling hits from past 110 yearsThe map takes users through the solar system and Milky Way playing songs based on when they were released and the distance in the universe the map is showing 
 Question:Put simply, the power of the radio signals weakens the further they travel and would eventually be drowned out by background noise in the _.

Milky Way