No one can presently answer that. However, its looking more and more like the Universe is either a Hologram or the Multiverse (an infinite number of Universe that spring into being every-time you make a real-life decision. At every junction a new Universe is created, just not where we can see it. I believe both that the Universe is a hologram and that its one of an infinite number of other Universes (one where I was homeless, one where I was President, one where I was extremely wealthy, etc.) However, those are not "my Universe" so I'll never see it. We can only start to image our Universe and our place in it (small and unimportant as that is). Let me give you some context in the size of just our little Solar System.
A comparative guide to the size of just our Solar System (i.e., how wrong are those solar models in the classroom?)
If the Sun were 3 inches in diameter (at near 1,000,000 miles in its actual size) and placed at the End of the End Zone of a Football field, then Mercury would be 8 feet away (or 36,000,000 miles) with each foot equalling almost 4,000,000 miles! Venus would be 17 Feet from the Sun (or 67,000,000 million miles). Earth orbits 22 feet away at 93,000,000 miles, STILL NOT OUT OF THE END ZONE! Mars has an odd, elongated orbit, but on average is about 140,000,000 million miles from the sun, or on the 2 Yard Line, just outside the end zone. That's all of the small rocky planets. Jupiter is on the 27 Yard Line, or 483,000,000 million miles. Saturn is another 30 yards down field on the 57 Yard Line at 870,000,000 million miles from the sun. Uranus is 1.7 Billion miles from the sun, or it would be on the end of the opposite End Zone, 120 yards across the Football field from the sun! Neptune is not even in the Football Stadium, but is 67 more yards (187 yards from the sun) out in the Parking Lot at (2.7 Billion miles from the sun). However, when describing the Solar System, the Solar System is the Sun, since it contains 99.8% of all the matter in the Solar System
The Universe IS infinite in that mankind can never and will never explore it all. Its also spreading so fast that the further out Galaxies will disappear into the distances of space. The Universe never quits expanding, and it may have never stopped (the Big Bang could still be banging.)