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Archive for the ‘space’ category: Page 208

Sep 5, 2022

Physicists discover new rule for orbital formation in chemical reactions

Posted by in categories: chemistry, energy, quantum physics, space

Squeaky, cloudy or spherical—electron orbitals show where and how electrons move around atomic nuclei and molecules. In modern chemistry and physics, they have proven to be a useful model for quantum mechanical description and prediction of chemical reactions. Only if the orbitals match in space and energy can they be combined—this is what happens when two substances react with each other chemically. In addition, there is another condition that must be met, as researchers at Forschungszentrum Jülich and the University of Graz have now discovered: The course of chemical reactions also appears to be dependent on the orbital distribution in momentum space. The results were published in the journal Nature Communications.

Chemical reactions are ultimately nothing more than the formation and breakdown of electron bonds, which can also be described as orbitals. The so-called molecular orbital theory thus makes it possible to predict the path of chemical reactions. Chemists Kenichi Fukui and Roald Hoffmann received the Nobel Prize in 1981 for greatly simplifying the method, which led to its widespread use and application.

“Usually, the energy and location of electrons are analyzed. However, using the photoemission tomography method, we looked at the momentum distribution of the orbitals,” explains Dr. Serguei Soubatch. Together with his colleagues at the Peter Grünberg Institute (PGI-3) in Jülich and the University of Graz in Austria, he adsorbed various types of molecules on in a series of experiments and mapped the measured momentum in the so-called momentum space.

Sep 5, 2022

You need to see the most elusive planet at opposition in the sky this month

Posted by in categories: mathematics, space

At opposition, and on surrounding nights, Neptune rises in the east around sunset and will be visible all night long, traveling along the ecliptic (the apparent path of the Sun and planets in Earth’s sky). Neptune can be seen in the constellation of Aquarius, below the “circlet” asterism of Pisces, and to the west of Jupiter.

The planet is in apparent retrograde motion (appearing to travel backwards in its orbit relative to Earth) from June 28 to December 3. Neptune will be at its closest to Earth the day before opposition, September 15, at only 2.7 billion miles (4.3 billion km) distance. At opposition, the Sun’s light will fully illuminate the planet’s surface, casting light directly onto Neptune from Earth’s point of view.

Since it is not visible to the naked eye, Neptune was unknown to astronomers until the 1800s, when it was the first planet to be discovered by mathematical prediction, rather than direct observation, owing to gravitational perturbation on the orbit of Uranus.

Sep 5, 2022

The stunning space phenomenon ‘diamond rain’ may be more common than once thought

Posted by in category: space

Diamonds are forever, but they might not be that rare.

Diamonds are forever, the saying goes. The precious stones may also be surprisingly abundant throughout the universe, a press statement reveals. Scientists have used common plastic to recreate the process that leads to diamond rain on Uranus and Neptune in the lab. They found that it is likely diamonds actually form in these planets’ atmospheres.

Previously, the consensus was that high pressure and temperature conditions deep below the surface of these ice giants turn hydrogen and carbon into solid diamonds.

Continue reading “The stunning space phenomenon ‘diamond rain’ may be more common than once thought” »

Sep 5, 2022

New polar ring galaxy discovered

Posted by in category: space

Japanese astronomers report the detection of a new polar ring galaxy using the data obtained with the Subaru Telescope as part of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP). The discovery was detailed in a paper published August 26 on the arXiv pre-print server.

The so-called polar ring (PRGs) are systems composed of an S0-like galaxy and a polar ring, which remain separate for billions of years. In general, these outer polar rings, composed of gas and stars, are aligned roughly in a perpendicular orientation with respect to the major axis of the central host galaxy.

However, although more than 400 PRG candidates have been discovered to date, only dozens of them have been confirmed as real polar ring galaxies by follow-up .

Sep 5, 2022

Anders Sandberg — Grand Futures — Thinking Truly Long Term

Posted by in categories: computing, mapping, space

Synopsis: How can we think rigorously about the far future, and use this to guide near-term projects? In this talk I will outline my “grand futures” project of mapping the limits of what advanced civilizations can achieve – in terms of survival, expanding in space, computation, mastery over matter and energy, and so on – and how this may interact with different theories about what truly has value.

For some fun background reading, see ‘What is the upper limit of value?‘which Anders Sandberg co-authored with David Manheim.

Continue reading “Anders Sandberg — Grand Futures — Thinking Truly Long Term” »

Sep 5, 2022

Artemis: NASA’s Moon rocket will need leak repair

Posted by in category: space

The launch of the American space agency’s big new Moon rocket is facing a potentially lengthy delay.

Sep 4, 2022

Cosmic Perspective: 50 Images That Will Make Your Reconsider Your Existence

Posted by in category: space

The universe is a beautiful yet mysterious place. Here are 50 stunning images that will make you reconsider your existence.

Sep 4, 2022

Scientists now know how likely you are to be killed by space junk

Posted by in category: space

A new study has estimated the chance of causalities from falling rocket parts over the next ten years.

Sep 4, 2022

Home Astronomy A ‘Dead’ Sunspot Just Exploded, Launching A Plasma Ball Straight Toward Earth

Posted by in categories: habitats, space

A ‘dead’ sunspot on the surface of the Sun has erupted, and as a result, a massive plasma ball has been blasted straight towards Earth.

Sep 4, 2022

Side-by-side Jupiter images show James Webb’s infrared prowess. It spots auroras, rings, and faint galaxies Hubble can’t see clearly

Posted by in category: space

While Hubble can spot Jupiter’s auroras when capturing ultraviolet light, Webb’s infrared image shows the auroras in greater detail.

“I’ve never seen anything like that before,” O’Donoghue said, adding, “I can’t quite believe we’ve got that shot from such a vast distance. It really speaks to how effective JWST is at picking up faint light.”

Webb’s new images of Jupiter show two of the planet’s moons, Amalthea and Adrastea, the smaller of the two, measures just 12 miles across, according to NASA. In comparison, Hubble’s image of Jupiter shows the planet’s ocean-filled moon, Europa, which measures 1,940 miles across.