Inside an asteroid

April 10, 2018 by Michelle Wheeler, Particle

Why Perth scientists are hoping to score asteroid fragments brought back to Earth by an ambitious space mission.

When Japanese space mission Hayabusa2 lands on the asteroid Ryugu mid-year, Associate Professor Fred Jourdan will be watching very closely.

The Curtin University earth and planetary scientist saw the mission launch live in Japan in 2014 and is hoping to score pieces of the asteroid when Hayabusa2 returns to Earth.

He wants to shoot the asteroid samples with a laser beam and vaporise them.

It's all in the name of discovering more about our Solar System.


If Hayabusa2 is successful in collecting fragments from Ryugu, they will be among the most valuable dust particles on the planet.

But Fred and his colleagues have good reason to believe they might be awarded access.

In 2012, the team successfully bid for two grains from the asteroid Itokawa collected by the Japanese space agency (JAXA) mission.

These precious samples—the first and only particles ever collected from an asteroid—were analysed by Fred using specialised equipment at the John de Laeter Centre in Bentley.

"We proposed to date the samples, but because they were so small, there were very few—if any— other labs in the world that could do that," he said.

"The samples—they are the width of the human hair, they were less than 100 microns, which is very, very challenging."


Itokawa is more of a peanut-shaped pile of rubble than a traditional boulder asteroid, and it has a violent past.

Fred's research, published last year, showed that the asteroid was likely battered by a series of collisions that caused it to internally fragment.

One final impact caused the asteroid to shatter.

Fred's success meant he was awarded four more samples from Itokawa, despite the fact that he destroyed the first two.

"The argon-argon technique, which dates the sample, needs to completely vaporise and fuse the sample to release the gas that is trapped inside," he said.

"So those two grains, they've been lasered to oblivion, but JAXA were OK with that. It's not like we didn't tell them."


JAXA says Hayabusa2 has a lofty goal to "elucidate the secrets of the creation of life and the birth of the Solar System".

(No pressure Fred.)

But it will be a couple of years before we know if the to Ryugu is successful, with the return samples due back on Earth at the end of 2020.

Fred is also hoping a collaboration with China might mean he can get his hands on new samples from the Moon.

In the meantime though, he'll have to entertain himself with more earthly dust fragments.

"I'm very interested by volcanoes and eruptions and lava flows, so I have Ph.D. students working in different volcanic provinces around the world," Fred says.

"We're working on the relation between in the past and previous mass extinctions."

Explore further: Samples brought back from asteroid reveal 'rubble pile' had a violent past

Related Stories

Recommended for you

Blazar's brightness cycle confirmed by NASA's Fermi mission

October 18, 2018

A two-year cycle in the gamma-ray brightness of a blazar, a galaxy powered by a supermassive black hole, has been confirmed by 10 years of observations from NASA's Fermi Gamma-ray Space Telescope. The findings were announced ...

Astronomers find a cosmic Titan in the early universe

October 17, 2018

An international team of astronomers has discovered a titanic structure in the early Universe, just two billion years after the Big Bang. This galaxy proto-supercluster, nicknamed Hyperion, is the largest and most massive ...

Double dust ring test could spot migrating planets

October 17, 2018

New research by a team led by an astrophysicist at the University of Warwick has a way of finally telling whether newly forming planets are migrating within the disc of dust and gas that typically surrounds stars or whether ...

Magnetic fields may be the key to black hole activity

October 17, 2018

Collimated jets provide astronomers with some of the most powerful evidence that a supermassive black hole lurks in the heart of most galaxies. Some of these black holes appear to be active, gobbling up material from their ...

Researchers investigate the peculiar radio source IC 1531

October 17, 2018

An international team of researchers has investigated a peculiar extragalactic radio source known as IC 1531. The new study analyzes the nature of IC 1531's high-energy emission, suggesting that the source is a radio galaxy. ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.