Lifeboat Foundation

Now, in three papers that together exceed 150 pages, Guàrdia and two collaborators have proved for the first time that instability inevitably arises in a model of planets orbiting a sun.

“The result is really very spectacular,” said Gabriella Pinzari, a mathematical physicist at the University of Padua in Italy. “The authors proved a theorem that is one of the most beautiful theorems that one could prove.” It could also help explain why our solar system looks the way it does.

A highly unstable nucleus that decays by emitting five protons has been observed, offering an extreme case for testing nuclear models.

Researchers have found evidence of an extremely unstable nucleus for which more than half of the component particles are unbound, meaning that they are not tightly connected to the dense core of the nucleus [1]. The nucleus, nitrogen-9, is composed of a small helium-like core surrounded by five untethered protons that quickly escape after the nucleus’s formation. Previous experiments have seen at most four unbound protons in a nucleus. The research team had to carefully sift through a large volume of nuclear-collision data to identify the nitrogen-9 decays. This barely bound nucleus poses a unique challenge to theories of nuclear structure.

A nucleus with a large imbalance between its numbers of protons and neutrons is less stable than one in which the numbers are similar. In the extreme cases, these proton-or neutron-rich isotopes are unbound, meaning that one or more nucleons escape during decay. The boundaries between bound and unbound states—both on the proton-rich and on the neutron-rich sides of the nuclear landscape—are called drip lines. Researchers are interested in finding nuclei beyond the drip lines because they offer tests of models at the limits of nuclear existence. These exotic nuclei may also play a role in the formation of heavy elements in supernovae and in neutron star mergers.

Researchers have developed a new computer simulation of the early universe that closely aligns with observations made by the James Webb Space Telescope (JWST).

Initial JWST observations hinted that something may be amiss in our understanding of early galaxy formation. The first galaxies studied by JWST appeared to be brighter and more massive than theoretical expectations.

The findings, published in The Open Journal of Astrophysics, by researchers at Maynooth University, Ireland, with collaborators from US-based Georgia Institute of Technology, show that observations made by JWST do not contradict theoretical expectations. The so-called “Renaissance simulations” used by the team are a series of highly sophisticated computer simulations of galaxy formation in the early universe.

“There is this kind of power the images have. It really isn’t from us. We’re creating the context in which you can appreciate them, but we’re not forcing it,” Kahn said.

In the background, award-winning actress Michelle Williams narrates what we see, which, Kahn admits, was a bit of a deviation from his usual filmmaking blueprint.

“Many of my films are done just through putting together interviews with people or encounters with people,” he said. Or in other words, there is no doctored narrative.

In March of this year, astronomers detected a brilliant burst of gamma rays more than a million times more luminous than our entire galaxy. It was the second brightest gamma-ray burst (GRB) ever detected and lasted some 200 seconds.

A study published today in Nature reports that this object was a collision of neutron stars one million light-years distant. What’s more, thanks to the James Webb Space Telescope (JWST), astronomers were able to see that the blast also served as a cosmic chemical factory, forging some of the rarest chemicals found on Earth.

“The most robust evidence that the merger of two neutron stars caused this burst comes from its kilonova,” says lead author Andrew Levan of Radboud University in the Netherlands, referring to the optical and infrared light coming from the uber-sized explosion.

Scientists discovered a molten layer at the base of Mars’s mantle that affects its evolution and magnetic field.

A new study has revealed that Mars has a layer of molten silicates at the base of its mantle, above its metallic core. This finding challenges the previous estimates of the internal structure of the red planet, which were based on the first data from the InSight mission.

The InSight mission, which landed on Mars in 2018, deployed a seismometer to measure the seismic waves generated by quakes and meteorite impacts on the planet. By analyzing these waves, scientists could infer the size and density of Mars’s core, mantle, and crust in a series of papers published in 2021.

Scientists discover rare elements in a cosmic explosion of neutron star merger.

A spectacular cosmic explosion brighter than a million suns has revealed the secrets of how heavy elements are made in the universe.

Pitris/iStock.

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Intricate details within the human brain, faint signals in outer space, say cheese!

Researchers at the National Institute of Standards and Technology (NIST) and their collaborators revealed the creation of a superconducting camera in a statement.

Boasting an impressive 400,000 pixels, this innovative leap represents a four-hundred-fold increase in pixel count compared to any other device of its kind, revolutionizing the way scientists can capture faint light signals from the far reaches of space or explore intricate details within the human brain.

NASA astronauts Jasmin Moghbeli and Loral O’Hara are taking a spacewalk outside the International Space Station on Monday, Oct. 30, to remove electronics gea…