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A team of astronomers led by the Harvard & Smithsonian Center for Astrophysics (CfA) has now mapped the Local Bubble with the highest precision yet – and found that the Local Bubble was likely carved out of the interstellar medium by a series of supernova explosions millions of years ago.
This is consistent with previous studies, with an additional sting in the tail: the still-expanding Local Bubble is responsible for regions of heightened star formation at its perimeter.
"This is really an origin story; for the first time we can explain how all nearby star formation began," says astronomer Catherine Zucker of the Space Telescope Science Institute, who conducted the research while at the CfA.
The Local Bubble was only discovered relatively recently, in the 1970s and 1980s, through a combination of optical, radio, and X-ray astronomy. Gradually, these surveys and observations revealed a huge region about 10 times less dense than the average interstellar medium in the Milky Way galaxy.
Since we know supernovae can carve out cavities in space, sweeping up gas and dust as they expand outwards, this seemed a reasonable explanation for the Local Bubble.
www.sciencealert.com...
So why is the Solar System in the middle? Well, that's purely coincidence.
"When the first supernovae that created the Local Bubble went off, our Sun was far away from the action," says physicist and astronomer João Alves of the University of Vienna in Austria.
"But about five million years ago, the Sun's path through the galaxy took it right into the bubble, and now the Sun sits – just by luck – almost right in the Bubble's center."
According to the researchers, this suggests that the Milky Way is likely full of similar bubbles, since the likelihood of this happening is very low if the bubbles are rare. The idea evokes a Milky Way structured similarly to a sea sponge, or perhaps a flattened wheel of Swiss cheese.
www.sciencealert.com...
originally posted by: putnam6
It sounds sort of like how everybody tries to avoid Cleveland.
It certainly fits with the theories earth is on the proverbially other side of the tracks, it's the garbage dump of the universe, perhaps even the cosmic "Australia". The dumping grounds for eons of all the galactic refuse and scoundrels and malcontents.
or perhaps we have already been quarantined as the universal "Typhoid Mary"
In an infinite universe, everything is possible.
originally posted by: andy06shake
a reply to: just4fun
I think the 12 men who have walked on the moon may somewhat disagree with you there.
originally posted by: IAMALLYETALLIAM
originally posted by: putnam6
It sounds sort of like how everybody tries to avoid Cleveland.
It certainly fits with the theories earth is on the proverbially other side of the tracks, it's the garbage dump of the universe, perhaps even the cosmic "Australia". The dumping grounds for eons of all the galactic refuse and scoundrels and malcontents.
or perhaps we have already been quarantined as the universal "Typhoid Mary"
Clearly you haven’t been here but please keep spreading that message so people stop coming here.
I like being sparsely populated in a beautiful, unique environment where people aren’t ready to kill each other based on whether you wear a silly little red hat or vote for a hair sniffing’ brain donor.
I see a lot of projection coming from people in the states.
originally posted by: putnam6
originally posted by: IAMALLYETALLIAM
originally posted by: putnam6
It sounds sort of like how everybody tries to avoid Cleveland.
It certainly fits with the theories earth is on the proverbially other side of the tracks, it's the garbage dump of the universe, perhaps even the cosmic "Australia". The dumping grounds for eons of all the galactic refuse and scoundrels and malcontents.
or perhaps we have already been quarantined as the universal "Typhoid Mary"
Clearly you haven’t been here but please keep spreading that message so people stop coming here.
I like being sparsely populated in a beautiful, unique environment where people aren’t ready to kill each other based on whether you wear a silly little red hat or vote for a hair sniffing’ brain donor.
I see a lot of projection coming from people in the states.
Come on let's not act like the "Aussies' don't give America crap as well,that said what is wrong with this historical account of Australia. Not to mention your current government sounds rather penal according to its definitions.
Britain decided to use its new outpost as a penal colony; the First Fleet of 11 ships carried about 1500 people—half of them convicts. The fleet arrived in Sydney Harbour on 26 January 1788, and it is on this day every year that Australia Day is celebrated.
In all, about 160 000 men and women were brought to Australia as convicts from 1788 until penal transportation ended in 1868. The convicts were joined by free immigrants from the early 1790s. The wool industry and the gold rushes of the 1850s provided an impetus for free settlers to come to Australia.
penal
pē′nəl
adjective
Of, relating to, or prescribing punishment, as for breaking the law.
Subject to punishment; legally punishable.
Serving as or constituting a means or place of punishment.
originally posted by: IAMALLYETALLIAM
originally posted by: putnam6
originally posted by: IAMALLYETALLIAM
originally posted by: putnam6
It sounds sort of like how everybody tries to avoid Cleveland.
It certainly fits with the theories earth is on the proverbially other side of the tracks, it's the garbage dump of the universe, perhaps even the cosmic "Australia". The dumping grounds for eons of all the galactic refuse and scoundrels and malcontents.
or perhaps we have already been quarantined as the universal "Typhoid Mary"
Clearly you haven’t been here but please keep spreading that message so people stop coming here.
I like being sparsely populated in a beautiful, unique environment where people aren’t ready to kill each other based on whether you wear a silly little red hat or vote for a hair sniffing’ brain donor.
I see a lot of projection coming from people in the states.
Come on let's not act like the "Aussies' don't give America crap as well,that said what is wrong with this historical account of Australia. Not to mention your current government sounds rather penal according to its definitions.
Britain decided to use its new outpost as a penal colony; the First Fleet of 11 ships carried about 1500 people—half of them convicts. The fleet arrived in Sydney Harbour on 26 January 1788, and it is on this day every year that Australia Day is celebrated.
In all, about 160 000 men and women were brought to Australia as convicts from 1788 until penal transportation ended in 1868. The convicts were joined by free immigrants from the early 1790s. The wool industry and the gold rushes of the 1850s provided an impetus for free settlers to come to Australia.
penal
pē′nəl
adjective
Of, relating to, or prescribing punishment, as for breaking the law.
Subject to punishment; legally punishable.
Serving as or constituting a means or place of punishment.
What!? Convicts!? In Australia!?
Well, this changes everything! I was until your post completely unaware that our fore-fathers were sent here in chains by the ever so gracious royals.
Whilst there were certainly some bad characters among them many were sent here for such minor crimes as stealing bread to feed their families in the impoverished industrial wastelands of London and elsewhere in the UK, espousing Irish nationalistic sentiments and whatever other arbitrary minor infractions the crown deemed because they needed a free source of labour in the new colony.
You speak about it like we should be ashamed but we’re not.
And yes our government sucks. So does yours and basically everyone else’s.
What’s your obsession with Australia? I already had to correct you in another thread when you claimed we don’t have guns and now you claim it’s a garbage dump. Take the advice again from someone who actually lives here