GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Viewable universe
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Visible universe
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Observable universe
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Basic universe
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Timely universe
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Detailed explanation-1: -The boundary that separates the observable universe from the rest of the entire universe is called the cosmic light horizon, or particle horizon. The cosmic light horizon is estimated to be around 47 billion light-years from Earth.
Detailed explanation-2: -First, the observable universe is everything that we’ve been able to see or observe thus far. And second, the universe, or the whole universe, means everything that exists, or has existed, or will exist. More specifically, the observable universe is the region of space visible to us from Earth.
Detailed explanation-3: -Right now, in a 13.8 billion year old Universe, our current visibility limit is 46 billion light-years. Our future visibility limit is approximately 33% greater: 61 billion light-years. There are galaxies out there, right now, whose light is on the way to our eyes, but has not had the opportunity to reach us yet.