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Japan team finds traces of one of largest craters in solar system

Jul 29, 2020 (Japan Times) - A Japanese research team has announced the discovery of traces of the largest impact craters in the solar system on a moon of Jupiter.

The group from Kobe University and National Institute of Technology, Oshima College analyzed images of Ganymede's surface taken by the Voyager and Galileo space probes of the United States.

It found that furrows, or troughs, on Ganymede, the largest moon of the fifth planet of the solar system, are distributed in a concentric pattern spanning some 7,800 kilometers in radius.

The team, including Kobe University associate professor Naoyuki Hirata, concluded that the tectonic structures are marks of a giant crater caused by a major collision, as similar features exist at 1,900-kilometer-radius Valhalla Crater on Callisto, another moon of Jupiter.

The group also studied the conditions for creating such a giant crater through computer simulations. An asteroid of around 150 kilometers in radius, mainly made of ice, may have crashed into Ganymede over 4 billion years ago, it said.

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A newly formed tropical depression near Taiwan on June 9th is expected to intensify the seasonal rain front lingering over southwestern Japan, raising the risk of warning-level rainfall across Okinawa and the Amami Islands through around June 11th.

Japan's national soccer team arrived in Nashville, Tennessee, on June 8th from Monterrey, Mexico, where it had been conducting a pre-World Cup training camp, and held its first practice session at its base camp for the FIFA World Cup in North America.

A prolonged eruption at Sakurajima on June 7th blanketed parts of Kagoshima City in volcanic ash, turning roads gray and prompting long lines of vehicles seeking car washes after a plume of smoke rose 1,300 meters above the crater.

A powerful earthquake struck off Mindanao Island in the southern Philippines at 8:38 a.m. (Japan time) on June 8th, generating tsunami waves across parts of the Pacific, causing building collapses and casualties near the epicenter, and prompting the Japan Meteorological Agency to issue tsunami advisories along a wide stretch of Japan's Pacific coastline before lifting all of them at 4:50 p.m.

A clinic director and a former Peruvian staff member have been referred to prosecutors after the man allegedly performed medical procedures without a license, including an external cephalic version—a procedure used to manually turn a baby into the correct position before birth—at an obstetrics and gynecology clinic in Fukuoka City, raising concerns about patient safety and oversight in maternity care.

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A bear that had been repeatedly spotted in commercial and residential areas of Utsunomiya, Tochigi Prefecture, was captured in a residential neighborhood at around 3:30 p.m. on June 9th after authorities used a tranquilizer gun, but the city remains on alert because police say they cannot rule out the possibility that another bear may still be roaming the area.

A man believed to be in his 50s or 60s was found dead with knives lodged in his left eye and abdomen inside a container at a company property in Kobe's Suma Ward on June 8th, prompting police to investigate the possibility of a criminal case.

The family of James "Weston" Higginbotham, a 20-year-old Auburn University student who disappeared during a family vacation in Japan, announced on June 7th that he has been found dead after a volunteer search-and-rescue team located his body in a mountainous area outside Kyoto, bringing a week-long multinational search to a tragic end.

A clinic director and a former Peruvian staff member have been referred to prosecutors after the man allegedly performed medical procedures without a license, including an external cephalic version—a procedure used to manually turn a baby into the correct position before birth—at an obstetrics and gynecology clinic in Fukuoka City, raising concerns about patient safety and oversight in maternity care.

A 14-year-old junior high school girl was arrested on suspicion of robbery resulting in injury after allegedly spraying a woman in her 60s in the face and stealing her wallet during a robbery attempt in Kasukabe, Saitama Prefecture.

One of Asia's largest LGBTQ+ events was held in Tokyo on June 7th, bringing together sexual minorities, supporters, businesses, and community organizations to celebrate diversity and call for greater equality and protections for LGBTQ+ people.

At Futamigaoka Farm, operated by Abashiri Prison in Hokkaido, the people caring for the cattle are not livestock farmers but inmates serving prison sentences. Through daily work raising cattle, they are learning responsibility, empathy, and the value of life as Japan marks one year since the introduction of a new correctional system that places greater emphasis on rehabilitation.

A medium poodle named Rokuta, a member of Hiroshima's Wanpato Squad neighborhood patrol program, and his owner, Eri Toya, have received a letter of appreciation after helping locate a missing elderly woman in Fuchu Town, Hiroshima Prefecture, while on a routine patrol walk.