Its happening again, it seems.
Just a Drip
Losing air on a space station sounds perilous, but Roscosmos maintains that the crewmembers are safe and that the situation is under control. The leak is very small, it says, and backup systems are in place if needed.
Continue reading “New Leak May Force Russia to Ship Oxygen to Space Station” »
A long-gone dwarf planet-sized object likely produced unusual crystals that crashed into Earth.
CSIRO has made a detailed radio survey of the southern hemisphere, and discovered a million new galaxies.
Although radio astronomy has been around since the 1930s, it is only in recent years that astronomers have been able to make high-resolution maps of the radio sky. Sky maps are difficult for radio telescopes because radio antennas need to be focused on an extremely small patch of sky to capture images in high resolution. But with modern antennas and computer processing, we can now scan the sky quickly enough to map the heavens in a reasonable amount of time.
In the northern hemisphere, the most detailed radio sky maps have been done by the Very Large Array (VLA). In the 1990s the VLA made the first full-sky surveys of the northern sky. After its upgrade in the 2000s, the observatory began the VLA Sky Survey (VLASS), which has mapped nearly 10 million radio sources.
Continue reading “Australian Radio Telescopes Just Completed a map of the Universe” »
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Scientists unveiled the largest 3D map of the universe ever, showing its expansion rate over 11 billion years.
A generation after a NASA spacecraft’s probe found an unexpectedly hot and dense atmosphere at Jupiter, a newer agency mission may have some answers to the puzzle.
NASA’s Juno spacecraft discovered that these “hot spots” on the gas giant planet — which the Galileo spacecraft discovered in 1995 — are wider and deeper than previous models and observations suggest, according to results revealed Dec. 11 at the American Geophysical Union’s annual fall conference, held virtually this year due to the coronavirus pandemic.
A team of scientists at Freie Universität Berlin has developed an artificial intelligence (AI) method for calculating the ground state of the Schrödinger equation in quantum chemistry. The goal of quantum chemistry is to predict chemical and physical properties of molecules based solely on the arrangement of their atoms in space, avoiding the need for resource-intensive and time-consuming laboratory experiments. In principle, this can be achieved by solving the Schrödinger equation, but in practice this is extremely difficult.
Up to now, it has been impossible to find an exact solution for arbitrary molecules that can be efficiently computed. But the team at Freie Universität has developed a deep learning method that can achieve an unprecedented combination of accuracy and computational efficiency. AI has transformed many technological and scientific areas, from computer vision to materials science. “We believe that our approach may significantly impact the future of quantum chemistry,” says Professor Frank Noé, who led the team effort. The results were published in the reputed journal Nature Chemistry.
Central to both quantum chemistry and the Schrödinger equation is the wave function —a mathematical object that completely specifies the behavior of the electrons in a molecule. The wave function is a high-dimensional entity, and it is therefore extremely difficult to capture all the nuances that encode how the individual electrons affect each other. Many methods of quantum chemistry in fact give up on expressing the wave function altogether, instead attempting only to determine the energy of a given molecule. This however requires approximations to be made, limiting the prediction quality of such methods.
If you’ve ever heard someone refer to the idea of “working in space,” you’d be forgiven for thinking they were describing a science-fiction plot. But the number of humans actively working beyond Earth’s atmosphere — and living significant chunks of their lives there, too — is about to start growing at a potentially exponential rate. Given how small that population is now, the growth might look slow at first — but it’s happening soon, and plans are in place to help it start ramping up quickly.
The main company leading those plans in the near-term is Axiom Space, a private space station service provider, and eventual operator. Axiom is founded and led by people with International Space Station experience and expertise, and the company already operates R&D missions on behalf of private clients on the ISS with the help of NASA astronauts. It’s planning to begin shuttling entire flights of private astronauts to the station starting in 2021, and it’s also building a new, commercial space station to ultimately replace the ISS on orbit once that one is decommissioned.
Axiom Space’s Chief Business Office Amir Blachman joined us at TC Sessions: Space last week on a panel that included NASA Chief of Exploration and Mission Planning Nujoud Merancy, Sierra Nevada Corporation senior vice president and former astronaut Janet Kavandi, as well as Space Exploration Architecture (SEArch+) co-founder Melodie Yashar. The panel was focused on how public and private entities are preparing for a (relatively near) future in which humans spend more time off Earth — and further away from it, too.
O,.o.
Livescience.com | By LIVESCIENCE
Astronomers discover one of the longest filaments of the cosmic web. And it may help solve the puzzle of the universe’s missing matter.
Members of the US Space Force will be known as “guardians”, it was announced on the military service’s first birthday.
US Vice President Mike Pence said: It is my honour, on behalf of the president of the United States, to announce that henceforth the men and women of the United States Space Force will be known as guardians.
Mike Pence says soldiers, sailors, airmen, Marines and guardians will be defending our nation for generations to come.
Continue reading “‘Guardians’ of the galaxy: US Space Force members get a new name” »
