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the guardian today Monday 27 Jun 2016 Top story More » Jeremy Corbyn to hold crisis talks as Labour MPs try to force him out Supporters rally round party leader after mass resignations from shadow cabinet in wake of UK vote to leave EU Editor's picks More » Singapore Airlines plane catches fire while making emergency landing Flight SQ368 from Changi to Milan turned back to Singapore two hours into journey after reported engine problem Racist incidents feared to be linked to Brexit result Spanish elections: initial results say renewed deadlock beckons Rollercoaster crash at Scottish theme park leaves 10 injured Edward Snowden lawyer vows new push for pardon from Obama Global air pollution crisis 'must not be left to private sector' Most viewed in last 24 hours More » Chile beat Argentina on penalties to win Copa América – as it happened Minute-by-minute report: Argentina's wait for a major title continues after they lost the Copa América final to Chile on penalties Firms plan to quit UK as City braces for more post-Brexit losses Boris Johnson breaks silence to set out leadership platform Parliamentary fightback against Brexit on cards Will article 50 ever be triggered? Brexit triggers Labour coup attempt as Corbyn stands firm – as it happened Sport More » England recall Raheem Sterling in six changes against Iceland England's Eddie Jones saddles up to learn from Tour but warns of burnout James Ward greets Novak Djokovic draw with mixture of joy and trepidation Comment is free More » Corbyn sabotaged Labour's remain campaign. He must resign | Phil Wilson Jeremy Corbyn has made his point. Now it's time for Labour to move on | Zoe Williams Labour mutineers are betraying our national interest | Len McCluskey Culture More » Glastonbury 2016: Sunday night as it happened – Coldplay, a Bee Gee and Michael Eavis does Sinatra Glastonbury through the years: the mother of all festivals David Baddiel: 'I have no gene for shame. I just want to tell people the truth' Business More » Brexit is a rejection of globalisation Tata Steel near deal to save Port Talbot plant despite Brexit vote Technology More » British tech firms eye relocation after Brexit vote First successful ship-to-shore drone delivery takes place in New Jersey Travel More » Walking Hadrian's Wall: discovering the secrets of the landscape Clang! Sri Lanka's street food sounds as good as it tastes … Life and style More » Nigel Slater's hazelnut dukkah and beetroot garlic hummus recipes I'm cold and angry at my mother – how can I stop? | Mariella Frostrup Eyewitness picture of the day More » A vintage ship sails on the Neva river during the Scarlet Sails festival, which marks graduation day for Russian high school students AFP/Getty Images Football Comment is free Environment Get more Guardian emails

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[JAXA:0481] Trace of Itokawa's Four Billion Years of History Found on Particles

June 22, 2016 (JST)

Trace of Itokawa's Four Billion Years of History Found on Particles

A research team led by Aerospace Project Research Associate Toru Matsumoto of the Japan Aerospace Exploration Agency (JAXA) found that traces of more than four billion years of history up until now of the Asteroid "Itokawa" were recoded on the surface of particles that were recovered from Itokawa by the Asteroid Explorer "Hayabusa" to bring back to the Earth, and their surface patterns and marks were analyzed by the research team.

The particles analyzed this time were just over 10 micrometers in size, and their surface patterns and marks were merely in nanometers (one millionth of one micrometer). The research team observed the faint structure of the particle surface in details through X-ray microtomography (X-ray CT) and by scanning electron microscopes. As a result, the surface pattern that had been believed to be just one type was found to be at least four variations.

One of them was found to stem from Itokawa's parent body. Asteroid Itokawa was not in its current shape from the beginning. When it was born over four billion years ago, it was a parent body about 40 times bigger (than current Itokawawa). The parent body was destroyed in fragments once, and it is believed that those fragments were assembled again to form Itokawa because some particles analyzed this time retain the pattern that was thought to be made over four billion years ago.

In addition to the above, we also found some patterns that were formed due to long-time exposure to solar wind or caused by friction between particles. Those patterns are shaped in a time scale of one million to thousand years. In other words, we can track the asteroid history by observing the particle surface.

The research method this time can acquire a lot of information without hurting the precious particles. Therefore, this method will become an imperative first-step analysis skill when studying extraterrestrial objects.

[Publication]
Magazine: Geochimica et Cosmochimica Acta (dated August 15, 2016)
Thesis title: Nanomorphology of Itokawa regolith particles: Application to space-weathering processes affecting the Itokawa asteroid
Authors: Toru Matsumoto, Akira Tsuchiyama, Kentaro Uesugi, Tsukasa Nakano, Masayuki Uesugi, Junya Matsuno, Takashi Nagano, Akira Shimada, Akihisa Takeuchi, Yoshio Suzuki, Tomoki Nakamura, Michihiko Nakamura, Arnold Gucsik, Keita Nagaki, Tatsuhiro Sakaiya, Tadashi Kondo
DOI No.: 10.1016/j.gca.2016.05.011


URL:
http://global.jaxa.jp/press/2016/06/20160622_itokawa.html


National Research and Development Agency Japan Aerospace Exploration Agency (JAXA)

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Publisher :
 Public Affairs Department
 Japan Aerospace Exploration Agency (JAXA)
 Ochanomizu sola city,
 4-6 Kandasurugadai, Chiyoda-ku, Tokyo 101-8008 Japan
 TEL:+81-3-5289-3650

JAXA WEB SITE :
 http://global.jaxa.jp/

[JAXA:0480] Correction from JAXA

Correction from JAXA

We are sorry, but we had a typo in our last press release issued at 5:30 p.m. on June 24 titled "New Launch Date and Time of Soyuz Spacecraft (47S/MS-01) with Astronaut Takuya Onishi aboard for ISS Expedition 48/49 Long Stay Mission."
The year of launch date was announced "2015", but it should have been "2016."

The correct launch date is July 7, 2016.
We sincerely apologize for the error.

This page URL:
http://global.jaxa.jp/press/2016/06/20160624_47s.html

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Publisher :
 Public Affairs Department
 National Research and Development Agency
 Japan Aerospace Exploration Agency (JAXA)
 Ochanomizu sola city,
 4-6 Kandasurugadai, Chiyoda-ku, Tokyo 101-8008 Japan
 TEL:+81-3-5289-3650

JAXA WEB SITE :
 http://global.jaxa.jp/

The Guardian today - Australia edition

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Sign up to our Morning Mail Sign up now » A daily wrap of what's happening, stories we love and the latest news, sent early in the morning. Click here to sign up to our Morning Mail the guardian today - Australia edition Monday 27 Jun 2016 Editor's picks More » Australian election 2016: John Howard says Coalition hasn't ruled out more industrial relations reform – politics live Former prime minister also says Brexit affirmed his political adage: we decide who comes here and the circumstances in which they come. Follow all the day's developments live with Katharine Murphy From Julia Gillard to Hillary Clinton: online abuse of politicians around the world Malcolm Turnbull's attack on independents 'remarkably arrogant', say senators Singapore Airlines plane catches fire while making emergency landing Jeremy Corbyn to hold crisis talks as Labour MPs try to force him out National and electorate polling suggests Coalition victory – but not by much Sport More » No disgrace for Wallabies but lowered future expectations may be called for | Matt Cleary Australia secure 58-run win over West Indies in final of ODI tri-series Likable and watchable GWS Giants are becoming many AFL fans' second team | Craig Little Brett Morris keeping his options open over possible switch to England Ireland's unquenchable spirit burns fiercely until the end in lion's den Culture More » Mourning after the night before as Glastonbury dances away the blues Despite the lack of resources we need a commitment to the arts in schools that reflects their value | Stephanie Merritt Why grown-ups as well as kids are swimming to Finding Dory Comment is free More » Corbyn sabotaged Labour's remain campaign. He must resign | Phil Wilson Jeremy Corbyn has made his point. Now it's time for Labour to move on | Zoe Williams The Anyone But Boris campaign is up and running | Isabel Hardman Life and style More » The real reason you still shop at Ikea - and probably always will Boardman Road Pro Carbon: bike preview | Martin Love My royal family memorabilia: 'I think the Queen is wonderful' Technology More » British tech firms eye relocation after Brexit vote First successful ship-to-shore drone delivery takes place in New Jersey Science More » Juno probe closes in on Jupiter after five-year journey from Earth Brexit big blow to UK science, say top British scientists Environment More » Great Barrier Reef: scientists ask Malcolm Turnbull to curb fossil fuel use Mail-order wine pioneer becomes Australia's biggest environment donor Video More » Labor announces policy costings as Liberals hold official launch – video Malcolm Turnbull warns against voting for anyone but Coalition – video Julie Bishop on Anne Aly: 'We aren't funding her to give references to hate preachers' – video Most viewed in last 24 hours More » Argentina v Chile: Copa América 2016 final – live! Minute-by-minute report: Will Lionel Messi lead his team to their first Copa América title since 1993? Join Tom Lutz for the latest Brexit triggers Labour coup attempt as Corbyn stands firm – as it happened Brexit crisis won't end for years – and no one is taking responsibility Cracks deepen inside troubled marriage of Trump and Republican party Racist incidents feared to be linked to Brexit result Firms plan to quit UK as City braces for more post-Brexit losses Sport Culture Comment is free Get more Guardian emails Manage your email preferences One-click unsubscribe You are receiving this email because you are a Guardian Today - Australia edition subscriber. Guardian News & Media Limited - a member of Guardian Media Group PLC. Registered Office: Kings Place, 90 York Way, London, N1 9GU. Registered in England No. 908396