Posted on 01/12/2022 12:19:47 PM PST by BenLurkin
Researchers have long wondered what created this "superbubble." Now, a new study suggests that at least 15 powerful star explosions inflated this cosmic bubble.
Astronomers in the 1970s first discovered the gigantic void, known as the Local Bubble, after realizing that no stars had formed inside the blob for around 14 million years. The only stars inside the bubble either existed before the bubble emerged or formed outside the void and are now passing through; the sun is one such trespasser. This setup had suggested that several supernovas were responsible for this void. Those stellar explosions, the researchers said, would have blasted the materials needed to make new stars, such as hydrogen gas, to the edge of a huge area in space, leaving behind the Local Bubble that's surrounded by a frenzy of star births.
In the new study, published online Jan. 12 in the journal Nature, researchers accurately mapped the star-forming regions surrounding the Local Bubble and, in doing so, calculated how fast the superbubble is expanding. This allowed the team to work out exactly how many supernovas were needed to carve out the gigantic cosmic void and better understand how star-forming regions are created across the Milky Way.
The researchers used data obtained by the European Space Agency's Gaia space observatory to create a 3D map of the Local Bubble's surface and to calculate the trajectory of the seven main star-forming regions that make up the "skin" of the bubble. The observations also allowed the researchers to work out how fast the cosmic void is expanding, which is currently around 4 miles per second (6.4 kilometers per second)...
(Excerpt) Read more at livescience.com ...
I want a starship.
I still wonder if it is possible that as our solar system wanders around the Milky Way that we occasionally enter areas of electro-magnetic disturbance of a frequency that can cause a disruption in human neuropathways thereby influencing cognition.
IOW... Earth flies through a Stupid Zone in the Universe.
It’d explain our politics over the last 20 years or so quite nicely.
Maybe the earth is actually an atom in the middle of a hole in a slice of Swiss cheese stuffed into a ham sandwich on a giant’s table, and we’re about to be gobbled up.
Maybe we’re shooting along in a large semiconductor.
I believe HD is a reference to the Henry Draper catalogue.
Thus HD44954 would refer to the 44964th entry in the catalog.
“It is by chance that the sun is centered inside the bubble”
What are the odds? We live in such unique times.
44954th entry.
“Seriously. Just the right place for life to exist?”
Yup. Total accident. Sorta like how aircraft carriers accidentally spring into being fully assembled.
So what happened 5,000,000 years ago?
Seems that we would have gone through a very bumpy ride when going through the shock wave/star forming region.
Oh, WE happened ! Lol
“ Although the animal species “hominid” has several different definitions it is commonly defined as referring to the species from which modern man developed. Thus, our ancient ancestors were similar in appearance to apes.
The hominids evolved into several different species whose modern day counterparts include apes, gorillas, monkeys, orangutans, and, of course, humans. They appeared on earth about 5 million years ago and were primarily vegetarians, eating fruits and nuts.
Some hominids eventually evolved into humans, but originally they had brains that were much smaller than ours and they had teeth that were much bigger.
The hominids lived during a dynamic period of earth evolution in which volcanoes were numerous and erupted frequently, spewing lava, gas, and rock into the air. Survival for them must have been a challenge!
Hominids seemed to have originated in what we now know as Africa. At some point in time our distant relatives evolved from the early ape like hominids and the features that distinguished early human forms from other hominids were their ability to walk on two feet, their larger brains, and their ability to include meat in their diet.”
So the END of one Era
“ Proterozoic Eon (2,500 – 541 million years ago)
The oxygenation of the atmosphere by cyanobacteria had extreme consequences. One iron deposits in the oceans had been filled, produced oxygen began to accumulate in the atmosphere. Oxygen was poisonous to anaerobic life so the activity of cyanobacteria killed off many anaerobic species. This oxygenation also had the effect of allowing the development of multicellular eukaryotic life. Oxygen is very reactive so the oxygenation of the atmosphere allowed the development of organisms that could use oxygen. It is believed that the first eukaryotes emerged from the symbiosis of prokaryotic life.
At the time, the atmosphere was made of mostly methane which is a very potent greenhouse gas. The accumulated oxygen reacted with the methane, making carbon dioxide. The lowered greenhouse effect caused a global drop in temperatures and plunged the earth into a 300,000,000 year long ice age. During this “snowball Earth” period, the entire surface of the Earth was frozen or nearly frozen.
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During this time period, the Earth went through a high amount of tectonic activity resulting in the formation and fragmenting of a number of supercontinents, including ones named Columbia, Rodina, Laurentia, and Gondwana. Radiation from the sun still made land relatively inhospitable, so most life existed in the oceans. Over time, oxygen accumulation created the ozone layer which allowed life to diversify on land.”
If we are inside the swiss cheese bubble what if the cheese is in a bologna sandwich about to be eaten by a fat, obnoxious giant alien boy somewhere out there?
Humbling thought.
And the START of the third age.
“ Paleozoic Era (541 – 245 million years ago)
The beginning of the Paleozoic era in the Cambrian period signified the largest diversification of life in Earth’s history. Starting with the development of hard-shelled invertebrates in the ocean, the diversity of life saw a huge uptick that resulted in the development of amphibians, reptiles, and mammals.
First came the development of fish and other invertebrates in the ocean. Eventually, certain fish species moved to the land. these first fish species to make their way onto the land are the ancestors of every land-dwelling eukaryote since, humans included. The first vertebrate land animals were amphibians who began to populate the continent of Gondwana. Around this time, the first arthropods and insects also emerged.
During this time, large plant species flourished on land and contributed to the accumulation of oxygen. Major shifts in the Earth’s climate contributed to the destruction of theses forests resulting in an event called the Carboniferous Rainforest Collapse. The compacting of the forest formed the majority of coal deposits in the world and the collapse of the forests dominating the land cleared the space for the development of reptiles.
The Paleozoic Era ended with the Permian-Triassic extinction event which killed off 96% of marine life and 70% of terrestrial life. The dominant theory on the nature of the Permian-Triassic extinction event is that a giant meteor struck Earth, which caused long term climate damage and volcanic eruptions.”
According to my post #33, you are a genius. 😇
later
Looking at this got me to thinking...
The emptiness of the local bubble means we are less likely to get smashed by space debris while learning how to navigate the stars.
It’s as if “someone” wanted us to have a chill and quiet place to develop our skills...
God?
How far are the twin Suns of Tatooine?
No one has ever seen a star form.
We only witness them exploding via a Nova or Supernova...
This is just more junk science...
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