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On August 17, 2017, scientists made history with the first direct observation of a merger between two neutron stars. It was the first cosmic event detected in both gravitational waves and the entire spectrum of light, from gamma rays to radio emissions. The impact also created a kilonova -- a turbocharged explosion that instantly forged several hundred planets’ worth of gold and platinum. The observations provided the first compelling evidence that kilonovae produce large quantities of heavy metals, a finding long predicted by theory. Astronomers suspect that all of the gold and platinum on Earth formed as a result of ancient kilonovae created during neutron star collisions. Based on data from the 2017 event, first spotted by the Laser Interferometer Gravitational-wave Observatory (LIGO), astronomers began to adjust their assumptions of how a kilonova should appear to Earth-bound observers. A team of scientists reexamined data from a gamma-ray burst spotted in August 2016 and found new evidence for a kilonova that went unnoticed during the initial observations.

Image credit: NASA/ESA/E. Troja

Terzan 5, 19 000 light-years from Earth in the constellation of Sagittarius (the Archer) and in the direction of the galactic centre, has been classified as a globular cluster for the forty-odd years since its detection. Now, an Italian-led team of astronomers have discovered that Terzan 5 is like no other globular cluster known.

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An international team of astronomers using Hubble have been able to study stellar evolution in real time. Over a period of 30 years dramatic increases in the temperature of the star SAO 244567 have been observed. Now the star is cooling again, having been reborn into an earlier phase of stellar evolution. This makes it the first reborn star to have been observed during both the heating and cooling stages of rebirth.

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Baylis, Françoise, 1961- author

Tatooine, a desert planet in 'Star Wars,' may have a real-life analogue 1,000 light-years away.

A 'capped inversion' trapped air pollutants near the ground.

Lightning is more than just a stunning spectacle. Take our quiz to see how much you really know about this electrifying natural wonder.

The research reveals genetic clues about the insects' behavior, making it possible to target specific attributes.

Complete catalog for the corn gene will have far-reaching implications in the fight against hunger and disease.

In 'Kaibab Elegy,' filmmakers Gavin Heffernan and Harun Mehmedinović show us a full cloud inversion at Grand Canyon National Park.

Astronomers have found what may be the oldest stars in the Milky Way.

For the first time ever, astronomers have directly observed planets in the process of being born.

The unusually close trifecta of black holes will likely merge into one giant entity over the next several hundred million years.

Hoag's Object, a celestial doughnut that features a galaxy within a galaxy, is a beautiful enigma of the cosmos.

Research by these women has changed the way we think about space — from dark matter to the search for extraterrestrial intelligence.

The explosion detected in a galaxy 390 million light-years from Earth was 5 times more energetic than anything seen before, but it's no Big Bang.

Popularized in 2017, the windshield phenomenon is used to describe the lack of insects on a windshield after a drive, a sign of a dwindling bug population.

Fire-created thunderstorms, "ember attacks," high winds and fire clouds are all a part of the intense fires down under.

If you browse the web, you'll come across many websites that has one or more video clips embedded in it. News websites such as BBC and CNN fall in this category. But, what about a website that has only video clips and nothing else?

SETI, or Search for Extraterrestrial Intelligence, has been an ongoing endeavor for many decades. In the early days, it was expected to be a quick success, so much so that national governments even helped fund these projects.

This ground breaking partnership of the two largest organizations in Sleep Breathing Dysfunction (SBD) represents a huge step forward in industry cooperation.

Nostradamus expert thinks the famous prophecies provide a shortcut to alien contact.

Genomes - an organism's complete set of DNA, including all of its genes - of any two people are more than 99 per cent the same. Reference laboratory to be created by Pure Health in Middle East.

So in this article, we will interpret, analyze the COVID-19 DNA sequence data and try to get as many insights regarding the proteins that made it up. Later will compare COVID-19 DNA with MERS and SARS and we’ll understand the relationship among them.

Susanne Bruckmüller, research associate at the Universität Erlangen-Nürnberg and coauthor of the HBR article "How Women End Up on the 'Glass Cliff'."

CSIR's Institute of Genomics and Integrative Biology (IGIB), Delhi, Centre for Cellular and Molecular Biology (CCMB), Hyderabad and Institute of Microbial Technology, Chandigarh are currently sequencing the genomes of the novel coronavirus, he said. Other CSIR institutes are also expected to join the process.

The nineteenth annual Grand Canyon Star Party will be held from Saturday, June 13 through Saturday, June 20, 2009 on the South and North Rims of Grand Canyon National Park. https://www.nps.gov/grca/learn/news/news-2009-05-20-star.htm

The twenty-first annual Grand Canyon Star Party will be held from Saturday, June 18 through Saturday, June 25, 2011 on the South and North Rims of Grand Canyon National Park. https://www.nps.gov/grca/learn/news/2011-05-25_star.htm

The 23rd annual Grand Canyon Star Party will be held from Saturday, June 8 through Saturday, June 15, 2013 on the South and North rims of Grand Canyon National Park. This event is sponsored by the National Park Service, Tucson Amateur Astronomy Association (South Rim), and Saguaro Astronomy Club of Phoenix (North Rim), with funding from the Grand Canyon Association. https://www.nps.gov/grca/learn/news/astronomers-to-provide-free-telescope-viewing-at-grand-canyon-national-park-june-8-15-2013.htm

The twenty-fourth annual Grand Canyon Star Party will be held from Saturday, June 21 through Saturday, June 28, 2014 on the South and North Rims of Grand Canyon National Park. https://www.nps.gov/grca/learn/news/grand-canyon-national-park-hosting-24th-annual-star-party.htm

The twenty-fifth annual Grand Canyon Star Party will be held from Saturday, June 13 through Saturday, June 20, 2015 on the South and North rims of Grand Canyon National Park. https://www.nps.gov/grca/learn/news/free-telescope-viewing-at-grand-canyon-june-13-20.htm

The twenty-sixth annual Grand Canyon Star Party will be held from Saturday, June 4 through Saturday, June 11, 2016 on the South and North rims of Grand Canyon National Park. https://www.nps.gov/grca/learn/news/star-party-2016.htm

The 27th annual Grand Canyon Star Party will be held from Saturday, June 17 through Saturday, June 24, 2017 on the South and North Rims of Grand Canyon National Park. https://www.nps.gov/grca/learn/news/2017-star-party.htm

The 28th annual Grand Canyon Star Party will be held from Saturday, June 9 through Saturday, June 16, 2018 on the South and North Rims of Grand Canyon National Park. https://www.nps.gov/grca/learn/news/2018-star-party.htm

This invention relates to processes for the production of organometallic compounds represented by the formula M(L)3 wherein M is a Group VIII metal, e.g., ruthenium, and L is the same or different and represents a substituted or unsubstituted amidinato group or a substituted or unsubstituted amidinato-like group, which process comprises (i) reacting a substituted or unsubstituted metal source compound, e.g., ruthenium (II) compound, with a substituted or unsubstituted amidinate or amidinate-like compound in the presence of a solvent and under reaction conditions sufficient to produce a reaction mixture comprising said organometallic compound, e.g., ruthenium (III) compound, and (ii) separating said organometallic compound from said reaction mixture. The organometallic compounds are useful in semiconductor applications as chemical vapor or atomic layer deposition precursors for film depositions.

A composite material and method of making and using the same is described. In particular a dental (and preferably photocurable) composite material, and the use of a composite material according to the invention as a dental material and a method for preparation of a composite material according to the invention. Also disclosed are novel radically polymerizable monomers comprising at least one polyalicyclic structure element and certain ethylenic structure elements, which are particularly suitable for use in a composite material according to the invention.

A device may include a physical phenomenon detector. The physical phenomenon detector may detect a physical phenomenon related to the device. In response to detecting the physical phenomenon, the device may record audio data that includes speech. The speech may be transcribed with a speech recognition engine. The speech recognition engine may be included in the device, or may be included with a remote computing device with which the device may communicate.

The invention relates to a programmable electronic metronome, capable of registering all meter and speed characteristics of any musical work and of producing, when the musical work is to be performed, substantially sharp, perceivable, e.g. acoustic, signals representing said characteristics in the appropriate succession. The metronome comprises a keyboard for producing signals associated with at least three variables, which are bar number, speed and meter, and defining digital values for said variables, which values are stored in at least one volatile electronic memory, comprising segments severally correlated to each of said variables, to define digital data sequences. The metronome further comprises a reader for the data sequences, whereby to associate to each bar number digital values of speed and meter, and a transducer for transforming said values into electric impulses, which produce a corresponding succession of perceivable signals. Preferably a further transducer, having an inlet/outlet, is provided for transforming said data sequences into recording signals, which may be recorded onto and retrieved from a hard memory.

The invention relates to a process for preparing pentabromobenzyl acrylate through the reaction of pentahalobenzyl halide with a salt of acrylic acid in water-immiscible solvent, wherein said salt is in aqueous form and the reaction is carried out in the presence of a phase transfer catalyst. A process for polymerizing the pentabromobenzyl acrylate in halogenated aromatic solvent and the poly (pentabromobenzyl acrylate) obtained are also disclosed.

A method of continuously manufacturing organometallic compounds is provided where two or more reactants are conveyed to a reactor having a laminar flow contacting zone, a heat transfer zone, and a mixing zone having a turbulence-promoting device; and causing the reactants to form the organometallic compound.

Nanoparticle catalyst compositions and methods for preparation of same are described. The nanoparticle catalysts are platinum-free and are useful in effecting selective ring-opening reactions, for example in upgrading heavy oil. The catalyst may be of monometallic composition, or may comprise an alloyed or core-shell bimetallic composition. The nanoparticles are of controlled size and shape.

The present invention is directed to novel organometallic complexes as catalysts for the reaction of compounds with isocyanate and hydroxyl functional groups to form urethane and/or polyurethane and the process employing such catalysts. More particularly, the present invention is directed to novel complexes of zinc(II) with substituted amidines. These novel catalysts are useful for the production of urethanes and polyurethanes which are important in many industrial applications.

A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase in a reaction chamber, wherein the monomer solution is metered into the reaction chamber via at least one bore, and the diameter is from 210 to 290 μm per bore and the metering rate is from 0.9 to 5 kg/h per bore.

The present application relates to novel monomers comprising polycarbosiloxane monomers useful in certain specific embodiments in the manufacture of devices. More particularly, the present application relates to certain ethylenically unsaturated free radical polymerizable monomers comprising polycarbosiloxane monomers. Even more particularly, the present application pertains to monomers comprising polycarbosiloxane monomers which further comprise at least two ethylenically unsaturated free radical polymerizable groups.

The present invention provides polymerization processes utilizing an ansa-metallocene catalyst system for the production of olefin polymers. Polymers produced from the polymerization processes have properties that vary based upon the presence or the absence of hydrogen and/or comonomer in the polymerization process.

A process for the purification of organometallic compounds or heteroatomic organic compounds from oxygen, water and from the compounds deriving from the reaction of water and oxygen with the organometallic or heteroatomic compounds whose purification is sought, comprising the operation of contacting the organometallic or heteroatomic compound to be purified in the liquid state or in form of vapor, pure or in a carrier gas, with a hydrogenated getter alloy, and optionally also with one or more gas sorber materials selected among palladium on porous supports and a mixture of iron and manganese supported on zeolites.

Disclosed are ionomer compositions neutralized by a combination of cesium and potassium that have antistatic properties. Also disclosed are articles, including laminates and monolayer or multilayer structures comprising such compositions to which neither powders nor dusts easily adhere electrostatically.

A method of purifying crude organometallic compounds using a stripping column and a gas stream is provided. This method removes relatively more volatile impurities as compared to the organometallic compound.

The present invention relates generally to a semiconductor device and, more specifically, to optimizing the creep-age distance of the power semiconductor device and a preparation method thereof. The power semiconductor device includes a chip mounting unit with a die paddle and a plurality of leads arranged side by side located close to one side edge of the die paddle in a non-equidistant manner, a semiconductor chip attached on the die paddle, and a plastic packaging body covering the die paddle, the semiconductor chip, where the plastic packing body includes a plastic extension portion covering at least a part of a lead shoulder of a lead to obtain better electrical safety distance between the terminals of the semiconductor device, thus voltage creep-age distance of the device is increased.