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 in the early 1970s were aimed at developing a tool capable of solving Cepheids. Because the civid, . Exactly since 1912. They can be observed in and inside our Milky Way Far away, thanks to the Hubble Space Telescope, is about 80 million .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 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.
“Incurable web evangelist. Hipster-friendly gamer. Award-winning entrepreneur. Falls down a lot.”