How big is the latest universe and how big is the universe currently?

The current radius of the universe is about 46.5 billion light-years, with a diameter of 93 billion light-years. However, 93 billion light-years is only the diameter of the universe that we can observe, and since the universe is expanding faster than the speed of light, we cannot know how big the universe really is if we only observe the universe from Earth, which is still an unsolved mystery.

How big is the universe? Star Awareness Project

How big is the universe? Star Awareness Project

It is impossible to know how big the real universe is, because the universe is expanding faster than light, and people cannot see the edge of the universe at all. We can only ask how big the observed universe is.

The universe appeared 13.7 billion years ago, and the celestial bodies in the universe were created in the big **, that is to say, the earliest celestial bodies were born 13.7 billion years ago. According to the principle that the universe is similar on a large scale, the Earth is theoretically able to receive light from these earliest celestial bodies, so the earliest celestial bodies that can be seen on Earth were born 13.7 billion years ago. In other words, the light emitted by these celestial bodies traveled through cosmic space for 13.7 billion years before reaching Earth.

But we ignore the effects of the expansion of the universe. The universe has always expanded, and the distance between the celestial bodies and the earth is constantly increasing, when those celestial bodies were formed 13.7 billion years ago, they would appear 13.7 billion light-years away from the earth, but the rapid expansion of space has increased the distance dramatically, and by the time the light reaches the earth, these distant celestial bodies have receded to 47 billion light-years away. In this way, the farthest object that can be observed by mankind is 47 billion light-years away from the Earth, and the scale of the universe is about 94 billion light-years.

I think it should be bigger than 13.7 billion light-years because the universe is expanding faster than the speed of light.

Some scientists estimate that because the observable radius is about 15 billion light years, considering the expansion, it could be 40 billion light years.

The farthest star ever observed seems to be 2 million light-years away from Earth.

How big is the universe? Star Awareness Project

Boundless unimaginable, boundless incredible, Kangqiao Chen.

Don't ask questions that don't go the extra mile, okay?

How big is the universe? Star Awareness Project

The distance from which we observe the moral universe today should be about 150-20 billion light-years. In fact, it's getting bigger and bigger all the time.

I once watched a documentary that said that the universe is 10 light-years to the 24th power. But this is far beyond what can be imagined.

It's all fake in the movie, this scientist hasn't predicted it yet, and the universe is constantly expanding, if you're really interested, introduce you to Stephen Hawking's A Brief History of the Universe, which is full of Hawking's own theories, and it's worth watching