source source How Many Galaxies Are There? tens of billions of galaxies 100 to 200 billion galaxies in the observable universe two hundred billion galaxies 100 to 200 billion galaxies in the observable universe 100 to 200 billion galaxies in the observable universe 100 to 200 billion galaxies in the observable universe 100 to 200 billion galaxies in the observable universe 100 to 200 billion galaxies in the observable universe hundreds of billions of galaxies source 200 billion galaxies