Question what intrigues you about space

Mar 17, 2021
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What makes you love space, the universe, and the ideas of other planets and life?

I'll start off. I've always liked space since I was a kid and I had stickers of the solar system on my bedroom wall. Now, still basically a kid, I'm more obsessed with space than I've ever been. No matter what anyone says, you really can't comprehend the sheer size of the universe and the things that subside in it. I love all the possibilities that can and cannot be and I'm excited to see what mankind can do and discover within my lifetime. I could keep going on but I don't want to tell me whole entire life on a forum.
 
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Mar 17, 2021
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*the sheer size of the universe*

Can you define this more? For example, how large do you think space is?
I don’t think space has a definite size, I believe it is infinite. If not infinite, it’s bigger then anything we can comprehend.
 
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rod

Oct 22, 2019
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This report indicates based upon BB cosmology, the current radius of the universe about 46.5 billion light-years (thus a diameter some 93 billion light years), see How Big Is the Universe?, https://www.livescience.com/how-big-universe.html

That is about 4.4 x 10^28 cm. Time elapsed since BB event ~ 4.352 x 10^17 s (seconds). Using the volume of a sphere, the universe is about 3.57 x 10^86 cubic centimeters. Most of this is not observable so astronomy cannot confirm the size calculated using the BB model.
 
Mar 17, 2021
8
5
15
This report indicates based upon BB cosmology, the current radius of the universe about 46.5 billion light-years (thus a diameter some 93 billion light years), see How Big Is the Universe?, https://www.livescience.com/how-big-universe.html

That is about 4.4 x 10^28 cm. Time elapsed since BB event ~ 4.352 x 10^17 s (seconds). Using the volume of a sphere, the universe is about 3.57 x 10^86 cubic centimeters. Most of this is not observable so astronomy cannot confirm the size calculated using the BB model.
That’s only our observable universe right?


According to this article, the universe is expanding 73.3 ±2.5 kilometers per second. Doesn’t this mean the universe only has a measurable size for a limited amount of time.
 

rod

Oct 22, 2019
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652
2,560
That’s only our observable universe right?


According to this article, the universe is expanding 73.3 ±2.5 kilometers per second. Doesn’t this mean the universe only has a measurable size for a limited amount of time.
Yes, that is a value for H0, 73.3 km/s/Mpc. I like to use CGS so
2.37547E-18 cm/s/cm​

However, observable is all we can confirm in science based upon the scientific method. So that means much of what is considered about the size of the universe in BB model, at present is not confirmed.
 

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