The means by which scary black holes at the centers of most galaxies suck up gas from their surroundings by overcoming centrifugal force has now been pinned down by astronomers.
The means by which scary black holes at the centers of most galaxies suck up gas from their surroundings by overcoming centrifugal force has now been pinned down by astronomers. Two researchers found that stars take swirling gases towards a galaxy’s central point, bringing them close enough for the black hole to gobble them up. "Although supermassive black holes wield an enormous tug on their immediate surroundings, astronomers have been uncertain how these astrophysical beasts manage to pull in the large amounts of gas they absorb from their host galaxies. A key problem is that gas swirling rapidly around a black hole has enormous angular momentum, which creates a centrifugal force that can slow or halt the material from edging toward the abyss. Generally, black holes easily swallow up gas that approaches to less than a third of a light-year from the galactic center, because the black hole’s own magnetic field acts like a brake, slowing down the rotational motion of the gas and causing it to fall in."
Upvote/downvote each of the videos below!
As you vote, keep in mind that we are looking for a winner with the most engaging social venture pitch - an idea you would want to invest in.
- What distinguishes humans is social learning — and teaching.
- Crucial to learning and teaching is the value of free expression.
- And we need political leaders who support environments of social peace and cooperation.
We're talking Ghost in the Shell type of stuff.
Maybe you watched Ghost in the Shell and maybe afterwards you and your friend had a conversation about whether or not you would opt in for some bionic upgrades if that was possible - like a liver that could let you drink unlimitedly or an eye that could give you superhuman vision. And maybe you had differing opinions but you concluded that it's irrelevant because the time to make such choices is far in the future. Well, it turns out, it's two years away.
Tragedy in art, from Ancient Greece to Breaking Bad, resists all our efforts to tie reality up in a neat bow, to draw some edifying lesson from it. Instead it confronts us with our own limitations, leaving us scrabbling in the rubble of certainty to figure out what's next.
- Why democracy has been unpopular with philosophers
- Tragedy's reminder that the past isn't finished with us
- …and why we need art in the first place
SMARTER FASTER trademarks owned by The Big Think, Inc. All rights reserved.