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Category: space

Squeezed between two pieces of man-made diamond in the laboratory, hydrogen has finally been transformed into a metallic form that is believed to exist inside planets such as Jupiter, scientists revealed last Thursday.

Metallic hydrogen, deemed the rarest and potentially among the most valuable on Earth, was theorized almost a century ago. If certain theoretical predictions hold true, the hydrogen could turn into a solid metal that can remain solid once crushing pressure is removed. It could also serve as a room-temperature superconductor, conducting electricity sans resistance.

“This is the holy grail of high-pressure physics,” said Harvard physics professor Isaac Silvera, who created the material along with postdoctoral fellow Ranga Dias.

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Particle physics is an interesting and complicated field of study. Its theoretical framework, the Standard Model, was developed during the second half of the twentieth century and it opened he possibility to explaining the behavior of the basic blocks of the Universe. It also classified all the particles, from the electron (discovered in 1897) to the Higgs Boson (found in 2012). It is not pretentious to claim that it is one of the most successful theories in Science.

Unfortunately, the Standard Model is also a very difficult theory to handle. By using an analytic approach many problems cannot be solved and computational methods require a huge computational power. Most of the simulations about this theory are performed in supercomputers and they have severe limitations. For instance, the mass of the proton can be calculated by the use of a technique called Lattice Quantum Chromodynamics (lattice QCD), but even using a supercomputer of the Blue Gene type the error was around 2% . This is a huge achievement that shows the utility of the theory, but it is also a signal about the necessity of developing new numerical tools to handle this kind of calculations.

One potential solution to this problem is to use quantum systems in order to perform the simulations. This idea is at the core of the field of quantum computing and it was first proposed by one of the pioneers in the study of particle physics, Richard Feynman . Feynman’s idea is easy to explain. Quantum systems are very difficult to simulate by the use of ordinary classical computers but by using quantum systems we can simulate different quantum systems. If we have a quantum system that we cannot control but we can mimic its dynamics to a friendly quantum system we have solved the problem. We can just manipulate the second system and infer the results to the first one.

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The inner edge of the habitable zone is the dividing line between peaches and cream and all out hell. Venus has likely seen both. The study of exo-solar systems like Wolf 1061 is key to understanding our own Venus.

New observations of the nearby star Wolf 1061, some 14 light years distant in Ophiuchus — already known to harbor three super-earths — should help planetary scientists better understand what went wrong with our own Venus.

Turns out hellishly-hot Venus-like worlds are quite common and early in the history of any given planetary system, such close-in terrestrial mass planets might even sport liquid water. But as their host stars evolve, the perilous inner edge of these extrasolar planetary systems’ habitable zones move decidedly outward.

As a star’s luminosity grows over time, such tenuous habitable zones can cause what might have been a promising climate to turn into a runaway greenhouse of the sort we see on Venus. With no liquid water at its surface, Venus is the very definition of inhospitable. That’s in contrast to a habitable clime where given the right atmospheric pressure and temperatures terrestrial mass planets can host temperate liquid water on their surfaces.

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More than 80 years after it was first predicted, physicists have created metallic hydrogen — a mysterious form of hydrogen that could be capable of superconducting electricity without resistance at room temperature.

Scientists have long suspected that hydrogen could exist as a metal in certain parts of the Universe, but this is the first time metallic hydrogen has ever been created on Earth, and the material is even stranger and more fascinating than scientists imagined.

“This is the holy grail of high-pressure physics,” says lead researcher Isaac F. Silvera from Harvard University. “It’s the first-ever sample of metallic hydrogen on Earth, so when you’re looking at it, you’re looking at something that’s never existed before.”

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https://youtube.com/watch?v=DnYUNQVcVnI

Technology giant IBM is known for of making bold predictions about the future, and it’s just announced its latest “5 in 5” list, highlighting the five innovations that they think will have the biggest impact on our lives over the next five years.

According to the company, in only a few years, we’re set to see huge developments in artificial intelligence (AI), ultra-powerful telescopes, smart sensors, and medical devices — with benefits ranging from healthcare and the environment, to our understanding of Earth and the Universe itself.

Of course, all these predictions are based on technology and research developments that are happening right now — there’s no way of knowing what else might crop up in the next five years.

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