Since the discovery of the expansion of the universe, or so, the question has tormented astrophysicists. How fast is this continued expansion today? Because observations and theory do not give the same answer. Today, the Hubble Space Telescope provides additional resolution.
It must be remembered that scaling was precisely one of the main reasons for the existence of this tool. Efforts since the 1970s have been aimed at developing a tool capable of solving a problem . Exactly since 1912. Both can be monitored in our country just in Far away, thanks to the Hubble Space Telescope, is about 80 million .. Because the civid, have always served as cosmic signs, a kind of standard scale for
When Hubble was launched in the 1990s, the first series of Cepheid observations were made. With the main objective of refining the measurement of distances of galaxies close to our own. In the early 2000s, efforts With an accuracy of 10%. The value of 72 is plus or minus 8 kilometers per second per megaparsec (km / s / Mpc).They were rewarded. Thus they were able to deduce value from
What is the correct value?
To improve on this value, the researchers then added new cameras to the space telescope. With the idea of achieving 1% accuracy. Led a special idea to cooperate Supernova, H0, for the dark energy state equation (SH0ES).
Thus, the new findings the researchers published today are based on a sample of cosmic markers that has more than doubled. It also includes an up-to-date analysis of historical data. In all, 42 supernovae – although Hubble witnesses a Annually, approx… – Also useful for determining distances in the universe. Thus astronomers estimate, given the size of their sample, only one chance in a million, the probability “Who tied the unlucky”. The value of the Hubble constant is about 73 km / s / Mpc. Exactly 73.04 +/- 1.04 km/s/Mpc.
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