1 day/36 days non linear time theory expansion Part 4-some details

I should say 1 day past due; but I will wait till Monday to take any action.  It is a curiosity.

The 36 day thing is bigger, that looms very large and close.  You can imagine the trepidation and excitement I have on this, eclipsing the perhaps more important lifestyle-wise  1 day (1 day past due) date.  It sounds like a long time but thirty six days is not a lot of time.  There are dozens of things to do, lists to make; watch charger, phone charger, 3 different headsets, one for exercise, swimming stuff and the charger for the headphones, just in case, financial issues to put in order (lists of those things which may not come to me automatically); hiking stuff.

Had a weird dream of sleeping with someone in the wrong place in the wrong setting.  Wasn't a bad dream, but I'm not sure if I was the right person in it.

Been going back and forth with this 2nd edition (now published in e-book form and hopefully in the paperback version shortly.

https://www.amazon.com/dp/B09BR8J23R

Lots of corrected errors.

Is it easier to be friends?  That is a question I've seen asked, I think there is an answer to that.  Is it possible to chose?  Can you chose?  I think the answer is yes.  If you chose to, I think the answer is yes.  But what if you don't chose to?  Then I am not sure what the answer is.  I know what I am thinking, I have to turn away until the darkness goes.

I haven't weighed in a while.  I did swim 1700 yards, then walked two miles, it's wednesday evening and I have all of my required intensity minutes for the week.  I haven't eaten, no appetite; but I had a good sandwich for lunch and a granola bar besides so I'm ok.  Perhaps my appetite will return tonight perhaps it will not.

On January 28th, I didn't write poetry to you, there is no sign I was even in love with you.  All there is ar ethese weird observations that mean so little to me now.

1/28/14

derive some interesting results from this about the rate of expansion. Taking the value of 73 km/s per Mpc, you can calculate H0 to be:

73,000 / 3.0857 ×10¹⁶ (convert both 73 kilometers and 1 megaparsec into meters) = 2.3658 × 10^-18

So space is expanding at the rate of about 2.3 attometers per meter per second (an attometer is 10^-18 meter). While this may seem like a tiny amount, it can add up given both the very large distances and very large times common in astronomical calculations.

Consider that Hubble's law says that the farther an object is from us, the faster it's moving away from us. This implies that there must be some distance at which the speed with which an object is moving away from us must be equal to the speed of light. This distance is called the Hubble Length. It can be calculated very easily as c/H0 where c is the speed of light. It comes to about 13.4 billion light years. In other words, objects that are 13.4 billion years away from us are moving away from us at the speed of light. Note that this does not violate relativity in any way, because the objects aren't really moving, the motion is entirely due to the expansion of space between us. There are no limits to this, and you may well have objects moving apart at speeds of several times the speed of light, if there is enough space between them. Again, this is not the movement of an object, in space, but rather the expansion of space itself.

The significance of the Hubble Length and the Hubble Volume is that objects that lie within the Hubble Volume (that are closer to us than the Hubble Length) are moving away from us at speeds slower than the speed of light. So a ray of light leaving these objects today will some day reach us. On the hand, objects outside the Hubble Volume are moving away from us faster than the speed of light. Light leaving these objects today will never reach us.

Using some math, you can calculate the size of the observable universe. Figure out the distance to the farthest galaxy that could have emitted light which reaches us today, then figure out how far that galaxy is now, given the expansion of the universe in the period between when the light was emitted and when it was observed. Astrophysicists have done this, and calculated that the observable universe is about 91 billion light years in diameter, or 45.5 billion light years in radius. This is quite a bit larger than the Hubble radius of 13.4 billion light years. It goes to show how much a huge volume of space can expand over billions of years

possible to calculate the limits of growth of the observable universe. It comes to about 124 billion light years in diameter, or about 62 billion light years in radius.

what does it mean when you read in the news that astronomers have found the farthest object ever seen? The story says:

Astronomers have pushed the NASA/ESA Hubble Space Telescope to its limits by finding what is plausibly the most distant and ancient object in the Universe ever seen. Its light has travelled for 13.2 billion years to reach Hubble, which corresponds to a redshift around 10. The age of the Universe is 13.7 billion years.

The dim object, called UDFj-39546284, is likely to be a compact galaxy of blue stars that existed 480 million years after the Big Bang, only four percent of the Universe’s current age. It is tiny. Over one hundred such mini-galaxies would be needed to make up our own galaxy, the Milky Way.

description carries several snippets of information:

• Its light has taken 13.2 billion years to reach Earth.
• We see it as it existed 480 million years after the big bang.
• The universe is 13.7 billion years old.

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