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You're getting down voted for a fair assumption, and no explanation. We can see more distance than the age of the universe Because Expansion of the universe H

by lelima 7y ago

You're getting down voted for a fair assumption, and no explanation. We can see more distance than the age of the universe Because Expansion of the universe Here is a complete explanation https://medium.com/starts-with-a-bang/how-is-the-universe-bigger-than-its-age-7a95cd59c605 https://medium.com/starts-with-a-bang/how-is-the-universe-bi...

drran 7y ago
This explanation has lot of weakness. Some scientists disagree with it. For example, if we heat up a metallic sphere, then it will expand in all directions. If we project this expansion backward, then we will see that metallic sphere was created just few hours ago. Do you agree with that? Moreover, why I should accept that Universe is expanded in single whoooping event? IMHO, constant vibration (noise) of gravitation field explains same effect without need for this single event. Vacuum just contracts and expands by tiny bit all the time, because something happens in Universe all the time, so light ages as it travels.
- dnadler 7y ago
  I won't pick out all of your arguments, but there is an abundance of evidence for the long-term expansion of the universe as measured by redshifted cosmological objects at numerous distances. Stephen Hawking's The Universe in a Nutshell does a nice job of introducing many of these concepts for those interested.
  - drran 7y ago
    Stephen Hawking's book was published in 2001. Please, look at data from 2019: https://en.wikipedia.org/wiki/Hubble%27s_law#Measured_values_of_the_Hubble_constant https://en.wikipedia.org/wiki/Hubble%27s_law#Measured_values...
- flukus 7y ago
  We aren't projecting anything, we're observing this expansion backwards as far as we can see, right back to around the CMB. To take your analogy, we witnessed the expansion of the metallic sphere from a point too small for us to see, there may be more going on that we don't understand, but it certainly looks like it expanded out of nothing.
  - drran 7y ago
    All that is speculation, which was based on two premises: 1) Hubble constant has value about 70(km/s)/Mpc; 2) with distance, we see "younger" (bluish) galaxies. (1) - wrong, Hubble "constant" has different values depending on frequency of light or radiowaves used for measurement. (2) - wrong, but papers about this started from 2008 only. In short, increasing diameter of telescope makes galaxies look "older".

by lelima 7y ago

drran 7y ago

This explanation has lot of weakness. Some scientists disagree with it. For example, if we heat up a metallic sphere, then it will expand in all directions. If we project this expansion backward, then we will see that metallic sphere was created just few hours ago. Do you agree with that? Moreover, why I should accept that Universe is expanded in single whoooping event? IMHO, constant vibration (noise) of gravitation field explains same effect without need for this single event. Vacuum just contracts and expands by tiny bit all the time, because something happens in Universe all the time, so light ages as it travels.

dnadler 7y ago
I won't pick out all of your arguments, but there is an abundance of evidence for the long-term expansion of the universe as measured by redshifted cosmological objects at numerous distances. Stephen Hawking's The Universe in a Nutshell does a nice job of introducing many of these concepts for those interested.
- drran 7y ago
  Stephen Hawking's book was published in 2001. Please, look at data from 2019: https://en.wikipedia.org/wiki/Hubble%27s_law#Measured_values_of_the_Hubble_constant https://en.wikipedia.org/wiki/Hubble%27s_law#Measured_values...
flukus 7y ago
We aren't projecting anything, we're observing this expansion backwards as far as we can see, right back to around the CMB. To take your analogy, we witnessed the expansion of the metallic sphere from a point too small for us to see, there may be more going on that we don't understand, but it certainly looks like it expanded out of nothing.
- drran 7y ago
  All that is speculation, which was based on two premises: 1) Hubble constant has value about 70(km/s)/Mpc; 2) with distance, we see "younger" (bluish) galaxies. (1) - wrong, Hubble "constant" has different values depending on frequency of light or radiowaves used for measurement. (2) - wrong, but papers about this started from 2008 only. In short, increasing diameter of telescope makes galaxies look "older".