The observable universe is about 93 billion light-years in diameter, meaning it extends roughly 46 billion light-years in every direction from Earth
. This size reflects the current distance to the farthest objects whose light has had time to reach us since the Big Bang, about 13.8 billion years ago, accounting for the universe's expansion over that time
. However, the total universe is much larger than the observable part. Estimates suggest it could be at least 250 times larger than the observable universe, possibly spanning around 7 trillion light-years or more, but the exact size is unknown and could be infinite
. The observable universe is just the portion we can see; beyond that lies the unobservable universe, which remains beyond our current capacity to measure or observe. In summary:
- Observable universe diameter: ~93 billion light-years
- Radius from Earth: ~46 billion light-years
- Age of universe: ~13.8 billion years
- Total universe size: Unknown, but at least hundreds of times larger than the observable universe, possibly infinite
This immense scale highlights how vast the cosmos is compared to human experience or even our entire galaxy
