"Some unknown "ingredient" in cosmic space is forcing the Universe to expand faster than scientists' models predict..." by Svetlana Ekimenko via Sputniknews Headline Image: CC BY 2.0 / ESA/Hubble, R. Sahai Ever since astronomer Edwin Hubble in 1929 observed the rate at which the Universe expands, called the Hubble constant H0, astronomers have been arguing about its actual value, as they realised that there was a discrepancy in this number between early universe observations and late universe observations. Some unknown "ingredient" in cosmic space is forcing the Universe to expand faster than scientists' models predict, according to the latest measurements with the Hubble Space Telescope. Evidence of this is not new in itself and has been accumulating over the years. However, in a new study, a team of researchers using the Hubble Space Telescope put together new data, appearing to substantiate the theory that the discrepancy, known as the "Hubble tension" after astronomer Edwin Hubble,