Universe Contains 10 Times More Galaxies Than Previously Thought

Posted: Oct 14 2016, 6:39am CDT | by , in News | Latest Science News

 

Universe Contains 10 Times More Galaxies Than Previously Thought
This Hubble Space Telescope view reveals thousands of galaxies stretching back into time across billions of light-years of space. The image covers a portion of a large galaxy census called Great Observatories Origins Deep Survey (GOODS). At least 10 times more galaxies exist in the observable universe than previously thought. About 90 percent of galaxies in the observable universe are too faint and too far away to be seen with present-day telescopes. Credit: NASA, ESA, GOODS Team and Giavialisco
  • The Known Universe has Many More Galaxies than was Supposed by Astronomers
 

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The known universe has many more galaxies than was supposed to be the case by previous astronomers.

A major question that is asked in any course in astronomy is exactly how many galaxies the universe contains. Hubble Deep Field Images which were taken in the 90s showed this to be a certain number which was surpassed recently upon closer observation.

Faint galaxies were discerned by peering through the mists of time and space. It was decided that there were about 100 to 200 billion galaxies in the known universe. 

Now though research points out the fact that such a figure is inaccurate. There are actually ten times this number of galaxies in the universe. There is, in other words, a lot more than meets the eye.

The images were converted into 3D pics which was a backbreaking task. This allowed for a pinpointed measurement of the number of galaxies in the universe.

The presence of galaxies which could not be discerned by present-day telescopes were also inferred from the raw data available to astronomers. A lot of number crunching and algorithmic analysis had to be employed in this worthy endeavor. 

For the numbers to match the tally, the vast majority of the galaxies had to be so far away and so faint as to be barely detectable. It is indeed a mindboggling fact that over 90% of the galaxies have gone unseen and unstudied by the astronomers’ telescopes.

Such is the state of our relative ignorance regarding the universe despite the limitless progress we have made as a species. The team of researchers looked into the past.

They went to the extent of going 13 billion years into the history of the universe. This showed variations in the number of galaxies. They were not evenly distributed throughout the history of the universe. 

A classic case of evolution has taken place throughout the duration of the universe’s timeline. Galaxies seemed to merge together over the course of time. This drastically reduced their number.

This is the reason we have today what can be called Olber’s Paradox. It is the reason why the sky is dark at night. Every part in the night sky is actually occupied by a part of a galaxy.

Yet the paradox is that these galaxies are virtually invisible to the naked eye. Even modern telescopes miss them in their scanning operations. This is owing to a large number of factors. The actual number of galaxies is way more than our puny imagination can conjure up. 

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The Author

<a href="/latest_stories/all/all/20" rel="author">Sumayah Aamir</a>
Sumayah Aamir (Google+) has deep experience in analyzing the latest trends.

 

 

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