A new report warns that UK government debt is likely to see a major increase this century. The 50-year projections are based on a world of increasing risk, alongside demographic, economic, technological, and other trends.
A first-of-its-kind quantum simulator could lead to the creation of never-before-seen materials powered by quantum phenomena.
Today we look at the subject of Interstellar Colonization, from the ship concepts and propulsion methods all the way to intergalactic colonization.
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Black Holes are often considered the greatest dangers to spaceships in science fiction, but they may turn out to be the perfect power source for future spaceships.
Check out PBS Spacetime’s episode on Hawking Radiation: https://www.youtube.com/watch?v=qPKj0YnKANw.
Toth’s Black Hole Calculator: https://www.vttoth.com/CMS/physics-notes/311-hawking-radiation-calculator.
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Hart outlines the differences between contemporary analytic styles of theistic thought and classical theism.
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We can model the motions of planets in the Solar System quite accurately using Newton’s laws of physics. But in the early 1970s, scientists noticed that this didn’t work for disk galaxies —stars at their outer edges, far from the gravitational force of all the matter at their center—were moving much faster than Newton’s theory predicted.
This made physicists propose that an invisible substance called “dark matter” was providing extra gravitational pull, causing the stars to speed up—a theory that’s become hugely popular. However, in a recent review my colleagues and I suggest that observations across a vast range of scales are much better explained in an alternative theory of gravity proposed by Israeli physicist Mordehai Milgrom in 1982 called Milgromian dynamics or Mond —requiring no invisible matter.
Mond’s main postulate is that when gravity becomes very weak, as occurs at the edge of galaxies, it starts behaving differently from Newtonian physics. In this way, it is possible to explain why stars, planets and gas in the outskirts of over 150 galaxies rotate faster than expected based on just their visible mass. But Mond doesn’t merely explain such rotation curves, in many cases, it predicts them.
