3M views · 106K reactions | Ever wonder how far away those stars in the night sky are? 樂 Our Sun’s nearest neighbor star is about 4 light-years away … our galaxy is over 100,000 light-years wide! But what does that even mean? Check out this Tumblr for a primer: https://nasa.tumblr.com/post/184153458369/how-big-is-our-galaxy-the-milky-way | NASA Universe | Facebook

On the largest scales our universe looks like a giant web. 🕸 Clusters and superclusters of galaxies form along giant thread-like 🧵structures with voids ⚫️ in between — like a cosmic foam. Learn more about how we’re studying this giant structure: https://go.nasa.gov/2KkSoct | NASA Universe