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 ...
MMmmmm Ementaler = MC2
Swiss cheese? I like Swiss cheese. I like Swiss cheese on my sandwiches. I even like Swiss cheese nachos. Try it sometime. Get some Doritos, some Swiss cheese and top with jalapeños. A real tasty treat.
Ementaler = MmmmC2
SWISS?
Dang it...a nice provolone or parmigiano reggiano would be nice...
Swiss is so ....ordinary.
[ Swiss cheese? I like Swiss cheese. I like Swiss cheese on my sandwiches. I even like Swiss cheese nachos. Try it sometime. Get some Doritos, some Swiss cheese and top with jalapeños. A real tasty treat. ]
When re-heating pizza add some swiss cheese to it...
Very good
Are we all going to die or do we have to wait?
If you make home-made lasagna, adding thin slices of sharp Swiss cheese to the layering works very nicely as well.
We’re.....wait for it....”on the bubble.”
I thought it had been a while.
Oh no...we’re so screwed...
Yea, that’s it...
not if you stick bacon in the holes
Seriously. Just the right place for life to exist?
As usual, they point out the problem (no new stars for 14 million years) but don't offer any suggestions on how to deal with the problem.
Didn’t see that in the article. Maybe I read too fast.
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