Earth's Radio Bubble: Has Our Voice Reached Aliens? The Fading Cosmic Whisper

• Earth's 'radio bubble' is an expanding sphere of radio waves, traveling at light speed since 1906, now 119 light-years in radius.
• Initiated by Reginald Aubrey Fessenden's first public radio broadcast in 1906, these waves unintentionally spread into space.
• While 75 star systems are within this bubble, signals weaken drastically, becoming indistinguishable from cosmic noise, making alien detection highly improbable.
• Compared to the 100,000 light-year Milky Way, our 119 light-year radio bubble is minuscule, barely reaching our cosmic neighborhood.
• Modern communication technologies like fiber optics keep signals closer to Earth, implying a much fainter future radio bubble and a 'quieter' Earth for the universe.

Why It Matters: Our accidental cosmic broadcasts are fading, unlikely to be heard by aliens, and future signals will be even quieter.