Definition: 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].
Input: An incredible road map of the Universe showing the pathways between our Milky Way and 100,000 other far away galaxies has been revealed by scientists after a 10-year quest into the unknown. The gigantic supercluster of stars, planets and asteroids, which stretches 500 million light years across and has the mass of a hundred quadrillion suns, has been named Laniakea - Hawaiian for 'immeasurable heaven'. The astonishing discovery has revealed that the Milky Way - home to Earth and our solar system - is on the fringes of the enormous cosmic web. Scroll down for video An incredible road map of the Universe revealing the pathways between our Milky Way (red dot) and 100,000 other far away galaxies has been revealedScientists reveal the Milky Way's position in an enormous supercluster of galaxies after 10-year quest into unknownHuge supercluster stretches 500 million light years across and has the mass of a hundred quadrillion sunsIncredible road map reveals Earth is connected with planets, stars and asteroids an unimaginable distance awayMilky Way is on fringes of gigantic cosmic web, which has been named Laniakea - meaning 'immeasurable heaven'Astronomers compared movement of the galaxies with water among hills and valleys to chart the supercluster 
 Question:And even though the collection of bright galaxies is incomprehensibly large, it makes up just a corner of the observable _.

Universe