Hayabusa-2 on display at JAXA’s facility in Sagamihara, suburban Tokyo during its unveiling on 31 August, 2014. Photo: Getty Images
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Japan readies space probe for mission to chase asteroid and shoot it with a cannon

Following on from the mixed success of the ambitious Hayabusa-1 mission, Japanese space scientists are almost ready to try again at hunting an asteroid.

While most of the headlines may be going to the European Space Agency's Rosetta probe right now - it being the first craft to enter into orbit around a comet - there are some other impressive space missions in the pipeline which shouldn't be forgotten. One of these was unveiled this week by the Japanese space agency, Jaxa - the asteroid-hunting Hayabusa-2 probe.

When Hayabusa-2 launches in November or December of this year it will begin a near-four year voyage to asteroid 1999 JU3, where it will then spend 18 months surveying the surface and running a series of experiments. By far the most audacious of these will be the "explosively-formed penetrator", which is a sciencey way of saying that missions planners are going to fire a 30cm copper ball from an on-board cannon at the asteroid's surface. The "bullet" is planned to have a relative velocity of roughly 2km/s, or around six times faster than a bullet travels when fired from a handgun - though this explanatory video from Jaxa appears somewhat lethargic by comparison:

The reason scientists want to shoot an asteroid is quite simple - dust from the crater the bullet leaves will reach escape velocity, creating a cloud of debris that Hayabusa-2 can then float through and collect samples from. (Though, just to be safe, the probe will sneak around to the other side of the asteroid in the time it takes for the bullet to reach the surface, just to avoid any debris that comes up at a dangerous speed.) Hayabusa-2 will then return to Earth by 2020, where that dust - containing, it is hoped, carbon, water and other minerals - will be studied for clues as to the nature of the early Solar System, and how life on Earth may have originated.

Besides the cannon, Hayabusa-2 will also carry four different landers. One, the Mobile Asteroid Surface Scout (Mascot), has been built by the French and German space agencies, is essentially a small laboratory in a box which will be able to take measurements of the conditions on the asteroid's surface for 16 hours after landing. Rather wonderfully, it will be able to "hop" twice using small feet before its batteries run out, tripling the positions on the asteroid's surface it can gather data from. Hayabusa-2 will also carry three Micro/Nano Experimental Robot Vehicle for Asteroid (Minerva-II) landers, more primitive rovers that should also hop languidly across the asteroid's surface, beaming back video footage to Earth and taking measurements. There's something quite beautiful about the idea of a quartet of bouncing robots exploring the surface of a tiny alien world.

In this sense Hayabusa-2 is a bigger, more ambitious version of Hayabusa-1, which only carried one Minerva rover when it arrived at the asteroid Itokawa in 2005. That mission was the first to rendezvous with an asteroid, land, collect samples and then return to Earth, but it was a mission threatened multiple times with failure. Budget cuts pushed back its launch and meant that Nasa couldn't provide it with a lander, a solar flare damaged its solar panels, internal mechanical faults threatened its ability to steer, and at several points scientists lost contact with it. It very nearly didn't have the ability to return to Earth, and, perhaps most tragically, its Minerva hopper was released at the wrong time - it missed the asteroid, floating away into space.

However, the samples that Hayabusa-1 did manage to retrieve were of immense scientific importance (once they'd been recovered from the Australian outback) - and the mission was seen as a source of national pride in Japan, becoming the subject of movies and toys. Reporting on the unveiling this week, the Japan Times quotes mission leader Hitoshi Kuninaka as "grateful" that the new probe is finally complete, and hopeful that, this time, nothing goes wrong. “Of course, I hope things will go smoothly. We have had many difficulties in the process of developing the new asteroid probe. Space is never an easy place.”

Impactors like Hayabusa-2 are not new - Nasa's Deep Impact probe used a projectile in 2005 to stir up a cloud of debris it could then fly through and analyse - but the scale of the mission's ambition is uniquely large. It will briefly appear in the news again when it launches later this year, but the thing about probes like this - as we're seeing with Rosetta - is that they're investments which generate their own wonderful form of interest. Rosetta took ten years to reach its comet, making it almost as old as Hayabusa-1, but when it did remind of us of its lonely voyage it was with spectacular, gorgeous photographs. 2017 should hopefully bring us all another set of gifts.

Ian Steadman is a staff science and technology writer at the New Statesman. He is on Twitter as @iansteadman.

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Forget “digital detoxes”. Spring clean your online life instead

Step one: remove the app on your phone which takes up the most time. 

In 2006, news broke that broke me. The British Heart Foundation unveiled a poster of a blonde girl guzzling a gallon of cooking oil. “What goes into crisps goes into you,” it read, as the charity declared that eating one packet of crisps a day equated to drinking five litres of oil a year.

I gave up crisps that Lent (an admirable act that was somewhat mitigated by devouring a six-pack of McCoy’s on Easter Sunday). Still, despite my continuing pack-a-day habit, the BHF’s statistic has never left me: 365 packets of salt and vinegar crisps are equal to five bottles of Filippo Berio. But other bad habits are harder to comprehend. Last week, I “liked” 36 things on Facebook, wrote ten tweets, and posted five Instagram pictures (two of which were selfies). What effect, if any, has this had on my mental and physical health? How much metaphorical cooking oil am I pouring into my body?

“You really don’t need to worry about the volume of your own social media interactions, based on the average digital user,” the founder of the digital detox specialists Time To Log Off, Tanya Goodin, told me. Goodin says that we “tap, click and swipe” our devices over 2,617 times a day and that the average person will post 25,000 selfies in their life.

Though these statistics seem shocking, what do they mean? What does swiping thousands of times a day do to our minds – or, for that matter, our thumbs? The experts are divided. In 2015, national newspapers spread stories suggesting that using an iPad would damage a toddler’s brain but the research didn’t mention the term “brain damage” once. In fact, as the Guardian pointed out in its debunking, studies produce mixed results: some say iPads help improve child literacy, others say they are distracting.

The studies about adults’ screentime are similarly hard to decipher. Heavy Facebook usage has been linked to depression but there isn’t any apparent cause and effect. Do depressed people use Facebook more, or does Facebook make us depressed? “Internet addiction disorder” (IAD) was a term originally coined as a hoax, but many now see it as a real and treatable problem. Yet it does not feature in the Diagnostic and Statistical Manual of Mental Disorders, and experts still struggle to set diagnostic criteria for it. How much internet is too much?

These academic ambiguities haven’t stopped the idea of the “digital detox” taking off. Detoxers refrain from using any electronics for a period of time in the hope that this will improve their mental health and real-world relationships. At the time of writing, if you search for “digital detox” on Instagram, you’ll find 25,945 people talking about their personal attempts. There are pictures of bike rides, sunsets and children playing, each posted – apparently without irony – to extol the virtues of getting off social media and turning off your phone.

Digital detoxing is also big business. Goodin runs workshops, retreats and camps where no electronics are allowed and the daily schedule consists of yoga, walking, swimming and drinking smoothies. The next one, in Italy, costs from £870 per head for a week. A multitude of such camps exist, as well as books, websites and guides on how to detox by yourself. To connect, man, you have to disconnect, you know?

All of this has made me a digital detoxing cynic. I don’t believe I need to switch off my phone to “live” better, because I believe my phone itself contains life. On Reddit, I can speak to strangers living hundreds of thousands of miles away about their lives. On Twitter, I can keep up to date – in real time – with news and events. If I want to learn yoga or make a smoothie, where will I go to find my local gym or the correct strawberry-to-spinach ratio? Technology can even inspire us to “get out more”. Last summer, the gaming app Pokémon Go spurred people to walk 2,000 more steps a day, and I’m willing to bet that brunch sales figures have skyrocketed since the invention of Instagram.

Digital detoxing relies on the vague idea that tech is somehow toxic. Even without scientific studies to back this up, most of us know from our own, anecdotal evidence how spending too much time on our phones can make us feel. We get down if our latest status doesn’t have enough likes, or our eyes hurt after the sixth “EXTREME PIMPLE POPPING” YouTube video in a row. So, at core, digital detoxing isn’t “wrong”: it is merely misguided. Instead of trying to cut out all technology for a week, we should be curbing our existing habits; rather than a digital detox, we should have a digital spring clean.

Delete – or hide – anyone on your Facebook friends list that you wouldn’t talk to in real life. Remove your work email from your phone (or ask your boss for a separate work phone if you absolutely need access). Delete the app that takes up most of your time – be it Facebook, Twitter or YouTube – so that you are forced to get to it manually, through your browser, and therefore become instantly more aware of how many times a day you open it up. Tanya Goodin also advises me to use my phone less at night. Essentially: go mild turkey. If this is too much and you believe you are addicted to your smartphone or laptop, then, of course, you should seek help (speak to your doctor or call the Samaritans on 116 123).

But most of us just need to get smarter about our internet use. Even if scientists proved that technology was damaging our brains, a week-long detox wouldn’t be the cure. Rather, we should focus on our bad personal habits and try to curb them. Do you get into too many arguments online? Do you ignore your partner because you’re staring at a screen? Do you post opinions you regret because you don’t think them through first? These behaviours are problematic – the internet itself isn’t. To control our lives, we shouldn’t switch off: we should get more switched on.

Amelia Tait is a technology and digital culture writer at the New Statesman.

This article first appeared in the 06 April 2017 issue of the New Statesman, Spring Double Issue

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