So Many Galaxies
We live in the Milky Way galaxy, orbiting our Sun on one of its spiral arms. Astronomers recently mapped 3,000,000 new galaxies, using Australia’s CSIRO telescope! Our solar system has 8 planets. Our Milky Way galaxy has 100 to 400 billion stars, each with their own solar system, which means 800 to 3 trillion planets. Think any have alien life?