Maailmankaikkeuden ikä?

Otto J. Makela

2024-03-14 11:43:35 UTC

Post by JiiPee
suuruusluokka kuitenkin sama, eli monia miljardeja.
En näe tuossa pointtia argumenttiin...
eri asia olisi jos aikaisemmin 15 miljard, ja nyt 100 miljoonaa.

Jostain syystä joitain ihmisiä ahdistaa että tiede korjaa näkemyksiään
uusimman saatavilla olevan tiedon perusteella. Tieteen popularisoinnissahan
(johon liki kaikki julkinen keskustelu tuntuu pohjaavan) on myös ongelma
ettei saadun tuloksen olettamuksista ja virhearvioista juurikaan puhuta.

In physical cosmology, the age of the universe is the time elapsed
since the Big Bang. Astronomers have derived two different
measurements of the age of the universe: a measurement based on
direct observations of an early state of the universe, which
indicate an age of 13.787±0.020 billion years as interpreted with
the Lambda-CDM concordance model as of 2021; and a measurement
based on the observations of the local, modern universe, which
suggest a younger age. The uncertainty of the first kind of
measurement has been narrowed down to 20 million years, based on a
number of studies that all show similar figures for the age. These
studies include researches of the microwave background radiation by
the Planck spacecraft, the Wilkinson Microwave Anisotropy Probe and
other space probes. Measurements of the cosmic background radiation
give the cooling time of the universe since the Big Bang, and
measurements of the expansion rate of the universe can be used to
calculate its approximate age by extrapolating backwards in time.
The range of the estimate is also within the range of the estimate
for the oldest observed star in the universe.
-- https://en.wikipedia.org/wiki/Age_of_the_universe

--
/* * * Otto J. Makela <***@iki.fi> * * * * * * * * * */
/* Phone: +358 40 765 5772, ICBM: N 60 10' E 24 55' */
/* Mail: Mechelininkatu 26 B 27, FI-00100 Helsinki */
/* * * Computers Rule 01001111 01001011 * * * * * * */