See the tiny blue circle superimposed on the Milky Way? That is a sphere centered on Earth that is 200 light years across. Technologically advanced civilization on Earth would be undetectable to
The Universe within 50000 Light Years - The Milky Way Galaxy
Our Milky Way Galaxy: How Big is Space? – Exoplanet Exploration: Planets Beyond our Solar System
Milky Way Galaxy - 8TH GRADE SCIENCE
What is the width of the Milky Way in light years? - Quora
Pin on Space is Beautiful
IAU Symposium 256
Milky Way galaxy: Facts about our galactic home | Space
NASA's Spitzer Spots Planet Deep Within Our Galaxy
It Would Take 200,000 Years at Light Speed to Cross the Milky Way | Space
Mysterious object in Milky Way 'spooks' astronomers | Deccan Herald
NASA's Hubble Telescope Captures Milky way-like Stunning Blue Galaxy Two Lakh Light Years Away
The Milky Way Is Still Growing, Surprising Scientists | by Ethan Siegel | Starts With A Bang! | Medium
Alien Life
Hubble Spies “Knife Edge Galaxy” About 50 Million Light-Years From Earth
File:Planet Discovery Neighbourhood in Milky Way Galaxy.jpeg - Wikimedia Commons
Milky Way - Wikipedia
How Big Is The Milky Way? - UNIVERSE TODAY
How far away is the center of our galaxy from the sun? | Socratic
Scientists discover 500 light-year-wide hole in the Milky Way torn open by a supernova | TechRadar
The Center of the Milky Way Exploded 3.5 Million Years Ago, Shooting Radiation 200,000 Light-Years Into Space
Milky Way has a 3,000-light-year-long splinter in its arm, and astronomers don't know why | Live Science
Young Galaxy 12 Billion Light-Years Away Mirrors the Milky Way | The National Interest
Astronomers discover mysterious 500-light-year-wide void in Milky Way | Space
Milky Way - Wikipedia
