Hubble Unveils Dark Matter-Rich Ghost Galaxies
The Hubble Space Telescope has found a series of tiny, old and pristine galaxies in our Milk Way's neighborhood which will help scientists better understand how the early Universe evolved.
What's the Latest Development?
The Hubble Space Telescope has unveiled a series of faint galaxies in our Milky Way's cosmic neighborhood, helping scientists resolve apparent inconsistencies in how the Universe has aged. Having barely changed over 13 billion years, the galaxies are fossils of the early Universe and are thought to be some of the tiniest, oldest, and most pristine galaxies to exist. "These galaxies are all ancient and they're all the same age, so you know something came down like a guillotine and turned off the star formation at the same time in these galaxies," said Tom Brown of the Space Telescope Science Institute in Baltimore.
What's the Big Idea?
Cosmologist believe that a process called reionisation, which marked a transitional period in the early Universe, shut down star-making factories in tiny galaxies. "In this period, which began in the first billion years after the Big Bang, radiation from the first stars knocked electrons off primeval hydrogen atoms, ionising the Universe's cool hydrogen gas." As further proof of their early origins, the recently-found ultra-faint galaxies are composed by a quantity of dark matter that outweighs ordinary matter by at least a factor of 100, whereas normal dwarf galaxies around the Milky Way have just a 10 to 1 ratio of dark matter to ordinary matter.
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These modern-day hermits can sometimes spend decades without ever leaving their apartments.
- A hikikomori is a type of person in Japan who locks themselves away in their bedrooms, sometimes for years.
- This is a relatively new phenomenon in Japan, likely due to rigid social customs and high expectations for academic and business success.
- Many believe hikikomori to be a result of how Japan interprets and handles mental health issues.
How a cataclysm worse than what killed the dinosaurs destroyed 90 percent of all life on Earth.
While the demise of the dinosaurs gets more attention as far as mass extinctions go, an even more disastrous event called "the Great Dying” or the “End-Permian Extinction” happened on Earth prior to that. Now scientists discovered how this cataclysm, which took place about 250 million years ago, managed to kill off more than 90 percent of all life on the planet.
A new study discovers the “liking gap” — the difference between how we view others we’re meeting for the first time, and the way we think they’re seeing us.
We tend to be defensive socially. When we meet new people, we’re often concerned with how we’re coming off. Our anxiety causes us to be so concerned with the impression we’re creating that we fail to notice that the same is true of the other person as well. A new study led by Erica J. Boothby, published on September 5 in Psychological Science, reveals how people tend to like us more in first encounters than we’d ever suspect.
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