Thread: Rate of expansion of the universe

i dont knw whether what i've thought about is theoretically correct . hence i'm posting it in this section.
well here it goes....

i think the universe is expanding[which now is a universal fact]

so what if we could calculate the rate of expansion of the universe with simple calculations....amazing right?
well u see some tribals from Africa known as the Dogons had claim they know about the three Sirius stars
Sirius A, Sirius B ,Sirius C .......
the mystery lies in here....how could the Dogons see them when all the three Sirius stars are invisible to the naked eye?..both the two stars Sirius are visible only as a faint dot from the Hubble Space Telescope and the third Sirius star is invible totally... only sensed by radiowave reflection...unbelievable right?
So it i thought that this information could be used to calculate the rate of expansion of the universe....
Since the Dogons know it their ancestors might have seen the stars which might have been distinctly visible then..
From this information we can calculate roughly the rate of expansion of the universe by a formula-
CURRENT DISTANCE OF SIRIUS C [SUBTRACTED BY] MINIMUM DISTANCE REQUIRED FOR A STAR TO BE VISIBLE FROM THE EARTH-[THE WHOLE THING DIVIDED BY] THE NUMBER OF YEARS THE DOGONS HAVE EXISTED


Well this thing is not going to be accurate as the universe is expanding with a constantly accelerating speed
hence we need to do two such observations to calculate the exact rate of expansion of the universe.

since i don't have needed caliber to do this or rather to approve this whole theory of mine i would like to encourage the whole community of The Science Forum to participate in this discussion [trying hard not to make tall claims pls....]

Nice idea but there seem to be two problems with this:

1. It is extremely unlikely that the Dogon knew about the other two Sirius stars

Though they do speak about sigu tolo [which is what Griaule claimed the Dogon called Sirius] they disagree completely with each other as to which star is meant; for some it is an invisible star that should rise to announce the sigu [festival], for another it is Venus that, through a different position, appears as sigu tolo. All agree, however, that they learned about the star from Griaule

Dogon people - Wikipedia, the free encyclopedia

(Incidentally, it is not certain that Sirius is a triple star system anyway.)

2. Expansion only happens at the scale of galactic clusters and so would not affect the distance to stars in our own galaxy (and in general not even to other galaxies in the local cluster).