- Thank you received: 0
Dingle's Paradoxes
- Larry Burford
- Offline
- Platinum Member
Less
More
21 years 1 month ago #7435
by Larry Burford
Replied by Larry Burford on topic Reply from Larry Burford
Cosmological (Hubble) Red Shift (CRS) is not detectable over small distances like within a galaxy. I believe it is even hard to detect over galactic-cluster distances.
You have to be talking about really large distances before it shows up. I don't see how satellites a few tens of thousands of kilometers away could exhibit any detectable level of CRS.
LB
You have to be talking about really large distances before it shows up. I don't see how satellites a few tens of thousands of kilometers away could exhibit any detectable level of CRS.
LB
Please Log in or Create an account to join the conversation.
21 years 1 month ago #7436
by Jim
Replied by Jim on topic Reply from
Why would you believe Hubble redshift is not observable at the local level? That makes absolutly no sense at all. The hubble Constant may be seen at every scale and is about equal to one nanometer per second square.
Please Log in or Create an account to join the conversation.
- tvanflandern
- Topic Author
- Offline
- Platinum Member
Less
More
- Thank you received: 0
21 years 1 month ago #7437
by tvanflandern
Replied by tvanflandern on topic Reply from Tom Van Flandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Jim</i>
<br />Why would you believe Hubble redshift is not observable at the local level? That makes absolutly no sense at all. The hubble Constant may be seen at every scale and is about equal to one nanometer per second square.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
You just equated the Hubble constant to an acceleration, which is impossible. It does not have the correct units (dimensions).
The Hubble constant is roughly 60 km/s/Mpc. This means that the redshift expressed as a velocity increases by 60 km/s for every megaparsec traveled. If light travels only from a GPS satellite to the ground, that is a distance of only 0.000 000 000 000 01 megaparsec. So the doppler shift (cosmological redshift) of a GPS satellite is only 0.000 000 000 000 60 km/s, This is about 6 angstroms per second, which is way too small to be detectable.
In fact, as Larry says, the Hubble constant cannot be detected within the solar system, but only over vast extragalactic distances. -|Tom|-
<br />Why would you believe Hubble redshift is not observable at the local level? That makes absolutly no sense at all. The hubble Constant may be seen at every scale and is about equal to one nanometer per second square.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
You just equated the Hubble constant to an acceleration, which is impossible. It does not have the correct units (dimensions).
The Hubble constant is roughly 60 km/s/Mpc. This means that the redshift expressed as a velocity increases by 60 km/s for every megaparsec traveled. If light travels only from a GPS satellite to the ground, that is a distance of only 0.000 000 000 000 01 megaparsec. So the doppler shift (cosmological redshift) of a GPS satellite is only 0.000 000 000 000 60 km/s, This is about 6 angstroms per second, which is way too small to be detectable.
In fact, as Larry says, the Hubble constant cannot be detected within the solar system, but only over vast extragalactic distances. -|Tom|-
Please Log in or Create an account to join the conversation.
21 years 1 month ago #7253
by Jim
Replied by Jim on topic Reply from
The 6 angstroms is about one nanometer so we aggree about the scale of the Hubble Constant. I get different units than you for some reason and I am puzzled by that. Other wise the only thing to resolve is weather or not the Hubble Constant can be measured at local scale and I am quite sure it can be since it is quite a large constant compared to some of the very small stuff you say is measured all the time.
Please Log in or Create an account to join the conversation.
- tvanflandern
- Topic Author
- Offline
- Platinum Member
Less
More
- Thank you received: 0
21 years 1 month ago #7016
by tvanflandern
Replied by tvanflandern on topic Reply from Tom Van Flandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Jim</i>
<br />the only thing to resolve is weather or not the Hubble Constant can be measured at local scale and I am quite sure it can be since it is quite a large constant compared to some of the very small stuff you say is measured all the time.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
People <i>have</i> looked. But the possibility that the solar system expands at the Hubble rate has been ruled out by planetary radar and spacecraft observations.
OTOH, GPS satellites are so close that we have absolutely no hope of seeing a redshift that small. It is beyond the accuracy of our best spectormeters. -|Tom|-
<br />the only thing to resolve is weather or not the Hubble Constant can be measured at local scale and I am quite sure it can be since it is quite a large constant compared to some of the very small stuff you say is measured all the time.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
People <i>have</i> looked. But the possibility that the solar system expands at the Hubble rate has been ruled out by planetary radar and spacecraft observations.
OTOH, GPS satellites are so close that we have absolutely no hope of seeing a redshift that small. It is beyond the accuracy of our best spectormeters. -|Tom|-
Please Log in or Create an account to join the conversation.
21 years 1 month ago #7026
by Jim
Replied by Jim on topic Reply from
You cannot expect that anyone will detect an expanding solar system and that is not what Hubble redsfift indicates anyway. You detect the redshift all over the universe and don't interpt the data as I do. The effect is beliefs in things that do not happen but can be made to seem to happen. Tidal theory that is generally accepted as truth is a good example of how real events can be wrongly understood and this is related to Hubble redsift that is observed but not recognized.
Please Log in or Create an account to join the conversation.
Time to create page: 0.277 seconds