The known universe in 1922 and than in 2012

[Playinghardball]

Talk about expanding our horizons...

[hvn_nbr_2]

1. 93 billion light years? Can that be?

Isn't the universe about 15 billion years old, since the big bang? So if everything was moving away at light speed from the point of the big bang, then it would only be 30 billion light years across (15 billion in each of two opposite directions). I haven't kept up with physics, astronomy, and cosmology so I may be all wet on this.

[derby378]

2. Here's a little secret...

Einstein's Theory of Relativity holds that nothing can travel faster than light in space. This does not mean that space itself cannot travel fast than the speed of light - indeed, many current models of the Big Bang hold that the universe did just that at the very beginning, a "cosmic inflation" period that was driven by what's known as a negative-pressure vacuum energy density. The universe's inflation exceeded the speed of light for an extremely miniscule time interval, after which it slowed down to below the speed of light.

Even so, 93 billion light-years across does sound like a bit of a stretch. The might be the distance to our nearest neighbor universe, provided that such a realm exists, but I don't think our own universe encompasses that much real estate - the visible portion covers some 13.7 billion light-years, and the invisible portion (due to cosmic inflation) might be double that amount.

[Confusious]

14. You have noticed one of the problems interesting current astronomy

We can't be the center of the universe can we? We made that mistake before.

But even if we are, how can the universe be so large? Is it even larger then we can see?

Might be a problem with how we calculate distance, but it's a still a question.

[Richard D]

3. wikipedia:

The age of the universe is about 13.75 billion years, but due to the expansion of space humans are observing objects that were originally much closer but are now considerably farther away (as defined in terms of cosmological proper distance, which is equal to the comoving distance at the present time) than a static 13.75 billion light-years distance.[2] The diameter of the observable universe is estimated at about 28 billion parsecs (93 billion light-years),[3] putting the edge of the observable universe at about 46–47 billion light-years away.[4][5]

[Bucky]

4. If the universe is 93b LY wide and we're 46.5b LY from the edge...

doesn't that mean that we're exactly at the center (give or take a parsec) of the universe?

Is that not proof that the whole universe revolves around my teenage daughter?

[WhoIsNumberNone]

5. +1

[sakabatou]

8. There is no center of the universe as it's isotropic

[Bucky]

10. Now you're just making up words

[sakabatou]

13. Hehehe

[JustABozoOnThisBus]

9. If it can be proved the universe revolves around your teenage daughter ...

... my cat will be devastated.

[Kaleva]

6. If Earth is smack dab in the middle of the universe, then everything revolves around Meta.

[nyquil_man]

7. Imagine what we'll know in 2102

and consider how ridiculous some of our 2012 ideas will look.

There is so much left to be known and we will never know it all. It boggles the mind.

[Dr. Strange]

11. In 2102...

all knowledge will be controlled by the Priests. At least until that naked guy discovers a guitar, commits suicide, and the Elder Race of Man returns and sets things right.

[TZ]

15. This post....

is from the Twilight Zone, na na na na.... (see if anyone who doesn't like Geddy Lee gets THAT reference)....

[Tommy_Carcetti]

12. The known universe as currently recognized by Donald Trump:

[TZ]

16. LOL

The hair is its own version of a black hole.....