A Galaxy Without Dark Matter Has Been Discovered, Changing Everything

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Astrophysicists were baffled when they discovered a galaxy located 65 million light years away from us with no dark matter.
So to those who are wondering why they were baffled, here is a brief.  The universe that we know consists of planets, stars and galaxies. You will be shocked to learn that this only covers 5% of the universe. Scientists so far have only been able to comprehend this 5%.
The other 95% make up what they call Dark Matter and Dark Energy. These two play an important role in the formation of the galaxies in the early universe. It remains an unsolved mystery in the study of physics.

Galaxy
Galaxy. Source: NASA

What is Dark Matter and Dark Energy?

 The very famous American Astronomer Edwin Hubble ( the Hubble Telescope was named after him) was the first to prove that the universe is expanding.
According to astrophysicists, if the universe only has galaxies, stars, planets and other things, it shouldn’t be expanding. So it must only mean there is something out there, a mysterious energy, that makes the universe expand. This is called Dark Energy and it makes up 68% of the universe.
And there is also another substance, which pulls galaxies, stars, other astronomical objects and holds it together. It’s not like regular matter; this isn’t anything that scientists have ever seen or been able to figure out. They call this stuff Dark Matter, which completes the remaining 27%.
Universe
Universe. Source: NASA

What’s new with this recent Galaxy discovery? 

Scientists have not been able to interact with Dark Matter yet. It emits no light nor reacts to any form of radiation. It has not been observed directly, but it has gravitational interference that makes it possible to identify using astronomical instruments and measurements. All they know so far is, every object in space is entitled to contain dark matter for the very reason mentioned above.
This new galaxy, called NGC 1052-DF2 (catchy), is located 65 million light years away and is about the same size of our own Milky Way. Usually all galaxies have a halo, that is, traces of dark matter around or through them. However, this galaxy is dim and has lighter mass with no traces of dark matter. This raises a question.
Galaxy
Galaxy NGC1052-DF2. Source: P. van Dokkum; R. Abraham; STScI, Space Telescope Science Institute 
“Finding a galaxy without dark matter is unexpected because this invisible, mysterious substance is the most dominant aspect of any galaxy,” said the lead author Peter van Dokkum of Yale University. “It’s about the same size of the Milky Way… but it has very few stars and has about 200 times less stars than the Milky Way.”
For decades, it was thought the blobs of dark matter that come together turn into stars, which builds up to one day create a galaxy. This newly discovered galaxy changes the whole belief of how the universe was formed as it lacks the core substance responsible for its birth.
Now, with this discovery in hand, astrophysicists are into research mode and are trying to understand how this works. The (re)search still continues… Let’s stay tuned, shall we?
For more like this, check out how scientists have deemed an alien malware attack to be a new threat to earth.

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