Receive news, sky-event information, observing tips, and Enter the Space & Beyond Box Photo Contest! That’s because we know the universe isn’t infinitely old — we know the Big Bang occurred some 13.8 billion years ago. The Great Filter: a possible solution to the Fermi Paradox, The Big Freeze: How the universe will die, Inside the quest to use cosmic explosions as distance markers, Half the matter in the cosmos was missing, but astronomers found it, Under the stellar sea: Hubble captures a Cosmic Reef, The Degenerate Era: When the universe stops making stars. A few generations of telescopes — COBE, WMAP, and Planck — sought to understand the shape of the universe. All we know for sure (mostly for sure) is that it’s bigger than we can observe, essentially because the farthest edges of the universe we can see don’t look like edges. We do not sell, rent or trade our email lists. Order now to get your Black Holes Collection from Space & Beyond Box! First, it’s still possible the universe is finite. Ask Astro: Why does the Moon disappear during New Moon? Signal. (In a fun twist, the universe has expanded since the Big Bang, so the objects that we see emitting light 13.8 billion years ago are now some 46 billion light-years away.). Last chance to join our 2020 Costa Rica Star Party! Was it curved like a ball, or flat like a piece of paper? By signing up you may also receive reader surveys and occasional special offers. View our Privacy Policy. How do stars create (and release) energy? The observable universe is still huge, but it has limits. That’s because we know the universe isn’t infinitely old — we know the Big Bang occurred some 13.8 billion years ago. Opinion: SpaceX’s Starlink satellites are about to ruin stargazing for everyone, Prospects for life on Venus dim in reanalysis of phosphine data, Sun-like star identified as the potential source of the Wow! That means that light has had “only” 13.8 billion years to travel. View our Privacy Policy. Plus, get FREE SHIPPING & BONUS GIFT! Is it better to use a telescope or binoculars to observe space? But is there even more that exists outside our observable bubble? The observable universe is still huge, but it has limits. If it were curved, and if we could measure the curve, we could work out the size of the universe. The universe is unquestionably huge. more from Astronomy's weekly email newsletter. That’s a lot of time, but the universe is big enough that scientists are pretty sure that there’s space outside our observable bubble, and that the universe just isn’t old enough yet for that light to have reached us. But all three telescopes say the universe is flat, which tells us nothing about the size of the universe. Join Us in Tucson for Our Annual Public Star Party! Get ready for this Halloween’s Blue Hunter's Moon, Infinity & Beyond — Episode 9: Saturn's rings, Infinity & Beyond — Episode 8: Black holes 101, Queen guitarist Brian May and David Eicher launch new astronomy book.

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