NASA Solar System Exploration on Instagram: "Over 11 billion miles away, an invisible wall separates our “home” in space from the galaxy beyond. 🏠🌌 This wall is the boundary of our heliosphere, the area of space carved out by our Sun. Like a house, the heliosphere shelters us from harsh weather outside and regulates the environment inside. What does our home in space actually look like? We still don’t fully know — but a new NASA mission is aiming to change that. Launching as early as Sept. 23,