does a redshift nebula entail an infinitely expanding universe?
A redshift nebula is a nebula that appears redshifted, meaning the light emitted by it is shifted towards longer wavelengths. This redshift is typically caused by the Doppler effect, which occurs when an object is moving away from an observer. In the context of cosmology, redshift is commonly interpreted as evidence for the expansion of the universe.
While the redshift of a nebula may suggest that the universe is expanding, it does not necessarily imply that the universe is infinitely expanding. Infinitely expanding universe is a concept in cosmology that suggests the universe will continue to expand forever. The ultimate fate of the universe is still a topic of ongoing research and debate among cosmologists.
In summary, a redshift nebula indicates that it is moving away from us, which is consistent with the idea of an expanding universe, but it does not necessarily entail an infinitely expanding universe.
so how big is a dimension that consist of a redshift nebula at the least?
It is difficult to determine the exact size of a dimension that consists of a redshift nebula because nebulae can vary greatly in size. Nebulae can range in size from a few light-years across to hundreds of light-years across.
For example, the famous Orion Nebula is approximately 24 light-years across, while the Tarantula Nebula in the Large Magellanic Cloud is about 600 light-years across. Therefore, the size of a dimension containing a redshift nebula would depend on the specific nebula in question.
Additionally, redshift nebulae are usually located within galaxies, so the dimension that contains a redshift nebula would also need to take into account the size of the galaxy in which the nebula is situated.
In summary, the size of a dimension containing a redshift nebula would vary depending on the size of the nebula itself and the size of the galaxy in which it is located.