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access_time oct 14 2016, 09h37
Images like this photo above were captured by the Hubble Space Telescope and served as the basis for the study (AFP)
A survey done with data collected over two decades by the Hubble telescope revealed that the universe is home to 2 trillion of galaxies, up to ten times longer than astronomers believed. The study, led by astrophysicist Christopher Conselice of the University of Nottingham, in England, took fifteen years to complete and will be published in the journal scientific Astrophysical Journal. According to Conselice, 90% of these galaxies cannot be observed from the Earth, leaving only 10% to be picked up by the instruments. Part of the light emitted in the space by the distant objects has not yet arrived here on the planet.
"most of them have very weak signals or are too far away. Who knows what interesting properties do we find when we study these galaxies with the next generation of telescopes?" said Conselice, in a note.
The exact amount of galaxies intrigued scientists since the discovery of Edwin Hubble. The american astronomer, has detected that the called nebulae were galaxies outside of the Milky way, and that could make the number increase.
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The first step to find the number was to convert the images
"This is very surprising, because we know that, over the 13.7 billion years of cosmic evolution since the Big Bang, galaxies were growing through of star formation and mergers with other galaxies. Find more galaxies in the past implies that the significant increase should have occurred to reduce the number of galaxies, with an extensive fusion systems," said Conselice.
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