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These asteroid particles may be our most 'pristine' sample of the outer solar system

Aug 16 (sciencealert.com) - Rubble retrieved from an asteroid in near-Earth solar orbit could be the most 'pristine' sample of cosmic rock we've had our primate paws on yet.

According to a new, in-depth analysis of the material delivered to Earth from the asteroid Ryugu, the samples of rocks and dust are among the most uncontaminated Solar System materials we've ever had the opportunity to study – and their composition suggests that they incorporate chemistry from the outer reaches of the system.

This not only gives us a unique tool for understanding the Solar System and its formation, it gives us new context in which to interpret other space rocks that have been contaminated by coming into contact with Earth.

"Ryugu particles," wrote a team led by cosmochemist Motoo Ito of the Japan Agency for Marine-Earth Science Technology (JAMSTEC) in Japan, "are the most uncontaminated and unfractionated extraterrestrial materials studied so far, and provide the best available match to the bulk Solar System composition."

It has been around 4.6 billion years since the Sun formed, and the Solar System around it. Obviously that's a very long time, and a lot of things have changed since then; but we do have time capsules that allow us to study the chemistry of the early Solar System in order to understand how it all came together. These are chunks of rock, such as comets and asteroids, that have been drifting about in space more or less unchanged since they formed. ...continue reading

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The activity of the weather front is expected to intensify due to Typhoon No. 1, leading to widespread rainfall from May 27th, with heavy rain warnings from Kyushu to Kanto by May 28th.

Princess Kako, the second daughter of Prince Akishino and Princess Kiko, arrived in Greece on May 26th, marking her third official overseas engagement. This visit commemorates the 125th anniversary of diplomatic relations between Japan and Greece.

In December 2023, the body of a man was discovered inside a suitcase along the banks of the Tamagawa River in Kawasaki City, Kanagawa Prefecture. Police have arrested five individuals, including the man's ex-girlfriend and her family, on suspicion of abandoning the body.

In an incident that has shocked the local community, a mother and her three children were found dead on May 23 in their home in Shinagawa, Tokyo. The father, who was also found at the scene with neck injuries, had finalized a divorce from the mother just three days prior.

The historic "Soma Nomaoi" event, which boasts over a thousand years of tradition and features armored horsemen parading in a scene reminiscent of the Sengoku period, commenced on May 25 in Fukushima's coastal region. Traditionally held in July, the event was rescheduled to May this year to avoid the severe summer heat after a horse died from heatstroke last year.

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A research group at Tokyo University of Marine Science and Technology has successfully produced King Salmon using Rainbow Trout, which can spawn multiple times unlike King Salmon that die after spawning once.

JR Central has announced that it will commence full-scale tunnel excavation for a section of the Linear Chuo Shinkansen in Kanagawa Prefecture starting on the 27th. This marks the first time a tunnel will be fully excavated at great depth between Tokyo and Nagoya.

NTT has unveiled Japan's first technology aimed at improving the power efficiency of data centers, which are known for their high heat generation and substantial power consumption.

A new facial recognition system, set to be widely used at next year's Osaka-Kansai Expo, has been unveiled.

Professor Kenjiro Kimura of Kobe University, who also serves as the CEO of Integral Geometry Science, has made a groundbreaking discovery in applied mathematics by solving an unsolved problem and inventing the world's first 'through-object visualization technology.'

Tokyo-based startup Innovative Space Carrier Inc. will develop a reusable satellite launch rocket in partnership with a U.S rocket engine maker, aiming for commercial use by around 2030. (Kyodo)

A next-generation vertical take-off and landing aircraft took to the skies of Tokyo for the first time on Friday. (NHK)

An event allowing visitors to experience life in 2050 has launched in Tokyo, including an elevator which enables transportation to space via a cable extending from a satellite to Earth.