Quotulatiousness

May 25, 2012

Grabbing the Dragon‘s tail

Filed under: Space, Technology, USA — Tags: , , , — Nicholas @ 11:20

Brid-Aine Parnell at The Register on today’s successful rendezvous with the ISS:

Elon Musk’s SpaceX has just made history with the first ever commercial cargoship to be captured by the International Space Station’s robotic arm.


Image from NASA TV

Flying above northwestern Australia, flight engineer Don Pettit aboard the ISS reached out with the Canadarm and grabbed the Dragon at 9.56am EDT, 14.56 GMT.

Reg staff are not sure if astronauts are given cheesy lines to say at these big moments, but Pettit had a great one ready.

“Looks like we’ve got a dragon by the tail,” he announced to Mission Control Centre in Houston.

“Looks like this sim went really well, we’re ready to turn it around and do it for real,” he joked.

May 24, 2012

Next step in Dragon/ISS drill: close fly-by

Filed under: Space, Technology, USA — Tags: , , , — Nicholas @ 10:53

Lewis Page at The Register on the successful Dragon fly-by of the ISS:

It’s another moment of truth for upstart space startup SpaceX as once again the company attempts to do something that has only ever been accomplished to date by major government space agencies: docking one spacecraft to another in orbit and transferring cargo.

Having launched its new Dragon spacecraft on Tuesday — on only its second flight — SpaceX is now seeking to bring the ship to a docking with the International Space Station on Friday. Many boxes must be ticked before this can happen, however: but today the first was checked off as the Dragon made a close pass within 1.5 miles of the station, and ‘nauts aboard the orbiting outpost confirmed that their remote-control console was able to command the new ship. This was done by ordering the Dragon to illuminate its strobe lights as it flew by the Station.

In fact the station’s crew — the Dragon tests were handled by André Kuipers of the ESA and NASA’s Don Pettit — couldn’t see that the lights were on owing to bright sunlight illuminating the still quite distant Dragon. However telemetry confirmed that the capsule had received the radio command from the ISS and activated its lights, and viewers of NASA TV were treated to video of the Dragon as it gradually overhauled the station from beneath, passing above South Africa and the Indian Ocean as it did so.

May 22, 2012

SpaceX Dragon launches successfully

Filed under: Space, Technology, USA — Tags: , , , — Nicholas @ 09:10

Brid-Aine Parnell reports on today’s launch of the SpaceX Dragon:

History is just days away from being made as SpaceX’ Dragon cargoship finally blasted off successfully on its Falcon 9 rocket this morning on its way to a rendezvous with the International Space Station.

Elon Musk’s private space firm has had a number of setbacks with the latest test flight of the Dragon, delaying again and again to make sure the software that will put it within spitting distance of the ISS was working properly. And just when it seemed there was no stopping the takeoff last Saturday, the computer held the ship on the ground.

The engines were already firing when the computer “saw a parameter it didn’t like” and aborted the trip. SpaceX engineers later replaced a faulty pressure valve.

However this morning at 08:44 UK time (03:44 US Eastern) there were no problems and the Falcon 9 rocket lifted off on schedule to place the Dragon capsule into an orbit which will carry it to a rendezvous with the station on Friday if all goes to plan.

The first hurdle in the commercial company’s maiden berthing with the ISS has been jumped, with the Dragon out of Earth’s atmosphere, but there’s still a lot to prove before Houston will give the go to attempt a docking.

May 20, 2012

Reducing child mortality in Africa

Filed under: Africa, Health — Tags: , — Nicholas @ 10:08

An interesting post at The GiveWell Blog, looks at the claims for the Millennium Villages Project (MVP):

The evaluation argues that the MVP was responsible for a substantial drop in child mortality. However, we see a number of problems.

Summary

  • Even if the evaluation’s conclusions are taken at face value, insecticide-treated net distribution alone appears to account for 42% of the total effect on child mortality (though there is high uncertainty).
  • The MVP is much more expensive than insecticide-treated net distribution — around 45x on a per-person basis. Therefore, we believe that in order to make an argument that the MVP is the best available use of dollars, one must demonstrate effects far greater than those attained through distributing bednets. We believe the evaluation falls short on this front, and that the mortality averted by the MVP could have been averted at about 1/35th of the cost by simply distributing bednets. Note that the evaluation does not claim statistically significant impacts beyond health; all five of the reported statistically significant impacts are fairly closely connected to childhood mortality reduction.
  • There are a number of other issues with the evaluation, such that we believe the child mortality effect should not be taken at face value. We have substantial concerns about both selection bias and publication bias. In addition, a mathematical error, discovered by the World Bank’s Gabriel Demombynes and Espen Beer Prydz, overstates the reduction in child mortality, and the corrected effect appears similar to the reduction in child mortality for the countries as a whole that the MVP works in (though still greater than the reduction in mortality for the villages the MVP chose as comparisons for the evaluation). The MVP published a partial retraction with respect to this error (PDF) today.

We would guess that the MVP has some positive effects in the villages it works in — but for a project that costs as much per person as the MVP, that isn’t enough. We don’t believe the MVP has demonstrated cost-effective or sustainable benefits. We also don’t believe it has lived up (so far) to its hopes of being a “proof of concept” that can shed new light on debates over poverty.

H/T to Tim Harford for the link.

“If I were to lose 14 pounds, I’d have to part with both arms. And a foot.”

Filed under: Health, Media — Tags: , , , , — Nicholas @ 09:57

Scarlett Johansson at the Huffington Post on healthy living and healthy weight:

People come in all shapes and sizes and everyone has the capability to meet their maximum potential. Once filming is completed, I’ll no longer need to rehash the 50 ways to lift a dumbbell, but I’ll commit to working out at least 30 minutes a day and eating a balanced diet of fruit, vegetables and lean proteins. Pull ups, crunches, lunges, squats, jumping jacks, planks, walking, jogging and push ups are all exercises that can be performed without fancy trainers or gym memberships. I’ve realized through this process that no matter how busy my life may be, I feel better when I take a little time to focus on staying active. We can all pledge to have healthy bodies no matter how diverse our lifestyles may be.

Since dedicating myself to getting into “superhero shape,” several articles regarding my weight have been brought to my attention. Claims have been made that I’ve been on a strict workout routine regulated by co-stars, whipped into shape by trainers I’ve never met, eating sprouted grains I can’t pronounce and ultimately losing 14 pounds off my 5’3″ frame. Losing 14 pounds out of necessity in order to live a healthier life is a huge victory. I’m a petite person to begin with, so the idea of my losing this amount of weight is utter lunacy. If I were to lose 14 pounds, I’d have to part with both arms. And a foot. I’m frustrated with the irresponsibility of tabloid media who sell the public ideas about what we should look like and how we should get there.

Every time I pass a newsstand, the bold yellow font of tabloid and lifestyle magazines scream out at me: “Look Who’s Lost It!” “They Were Fabby and Now They’re Flabby!” “They Were Flabby and Now They’re Flat!” We’re all aware of the sagas these glossies create: “Look Who’s Still A Sea Cow After Giving Birth to Twins!” Or the equally perverse: “Slammin’ Post Baby Beach Bodies Just Four Days After Crowning!”

According to the National Eating Disorders Association (NEDA), as many as 10 million females and 1 million males living in the US are fighting a life and death battle with anorexia or bulimia. I’m someone who has always publicly advocated for a healthy body image and the idea that the media would maintain that I have lost an impossible amount of weight by some sort of “crash diet” or miracle workout is ludicrous. I believe it’s reckless and dangerous for these publications to sell the story that these are acceptable ways to looking like a “movie star.”

May 19, 2012

The politics of the school lunch

Filed under: Bureaucracy, Government, Health, USA — Tags: , , , , , — Nicholas @ 10:41

Baylen Linnekin examines the school lunch issue, and finds yet another example of experts and government officials trying to override parental input and childrens’ own wishes “for the children”, of course:

School food is always a hot topic, and is perhaps more so now than it’s ever been. From a publicity standpoint, school food has taken off as an issue largely due to the efforts of [British chef and food nuisance Jamie] Oliver and First Lady Michelle Obama. But viewed from the standpoint of edibility, cost, and healthiness, food served by public schools via the USDA’s National School Lunch Program was already an issue because that program and its food have a decades-long track record of sucking. And in spite of the best efforts of Oliver and Mrs. Obama, along with new rules set to take effect in the coming months, I’m not optimistic that the quality of school food is likely to change anytime soon. Why?

If you’re one of those who thought all this talk about the National School Lunch Program had translated into better food, think again. Contrary to any visions you may have of expensive reforms leading to school kitchens serving as virtual clearinghouses for fresh fruits and vegetables, that just isn’t the case. Expensive reforms? You bet. They crop up every few years. But schools are still serving kids nachos. And sometimes — as happened last week at a public school in Ohio — those nachos are full of ants.

Issues like ants in food are hardly rare. And other systemic problems persist.

I remember what kind of crap my middle and high school cafeterias offered … and if I’d forgotten to bring a sandwich with me that day, going hungry always seemed like the better choice. The food on offer always seemed to manage the difficult stunt of being visually unappealing (sometimes being actually disgusting to look at), nutritionally inadequate, and either utterly flavourless (the better choice) or actively nasty. No wonder the best sellers in the cafeteria were the milk cartons (especially the chocolate milk), pop cans, potato chips, chocolate bars, and Vachon cakes (all of which were pre-packaged and relatively invulnerable to further processing).

As a 12-year-old army cadet, my first experience of army cooking was a huge shock: it was actually good! I didn’t know that cafeteria-style cooking didn’t have to be bland, boring, or nauseating. Schools couldn’t seem to manage the trick, but the army could.

School lunches also neuter the ability of families to make dietary choices their children. Consider the pink slime controversy earlier this year. Whether you were up in arms over chemically treated meat or thought it was completely fine to eat, the truth is if you’re a public school parent whose child eats a school lunch you still have little say over whether or not your child eats pink slime — or genetically-modified foods, sugars, starches, and a whole host of other foods about which decent parents (and experts) disagree.

Another good example of how school lunches usurp family decision-making took place in Chicago last year, where a seventh grader named Fernando Dominguez helped lead a revolt against his school’s six-year-old policy that banned students from taking their own lunch to school. According to the Chicago Tribune, the principal argued that the policy was put in place “to protect students from their own unhealthful food choices.”

[. . .]

These anecdotes help illustrate the point that food served in public school cafeterias has — along with prison food — long been one of the best arguments against the singular notion that big, mean corporations are responsible for all of the food problems we face in America. After all, public-school lunches are government creations. They’re subsidized by government, provided by government, served by government, and paid for by government. And they’re often gross, unhealthy, and wasteful.

But supporters of the National School Lunch Program, not surprisingly, argue that what’s needed are reforms, improvements, rejiggering, and — of course — more money.

SpaceX Dragon launch aborted, rescheduled to Tuesday at the earliest

Filed under: Space, Technology, USA — Tags: , , , — Nicholas @ 09:13

Lewis Page at The Register on the scrubbed launch this morning:

The Falcon 9 rocket from private space company SpaceX, intended to launch this morning and send a Dragon capsule loaded with supplies to the International Space Station, has failed to take off. The rocket’s computer aborted the launch automatically at almost the final possible moment, when its engines had already ignited but the vehicle had not yet been released from the pad.

“The computer saw a parameter it didn’t like,” commented launch controllers after the abort, which saw the Falcon’s 9 main engines flare briefly into life as the countdown reached zero before cutting out again.

The rocket is not thought to have been damaged by the aborted launch, and controllers announced a provisional plan to check the craft, refuel it and make another launch attempt on Tuesday morning at 03:44 AM local time (08:44 UK time).

“Shared values” can only take you so far in the market

Filed under: Economics, Environment, Media — Tags: , — Nicholas @ 08:54

Tim Worstall responds to a short snippet from the Telegraph, lauding the “shared values” marketing approach exemplified by the Ben & Jerry’s ice cream firm:

But of course, this only works with those who share or desire those values that you are pushing. And there are some very different value systems out there. There is an, admittedly and thankfully very small, market out there for a company whose values include being beastly to Jews. I don’t think it will shock anyone at all to hear that there really are racists in our society who would respond to having their idiocy pandered to. Or sexists, capitalists, neoliberals and all sorts of groups that have slightly different value systems from those put forward by Ben and Jerry’s.

[. . .]

So, companies that appeal to the values of their potential customers: yup, great idea. Have fun and make money. But I’m afraid you cannot complain if some of them appeal to values you don’t share: for many will not share the values that you push.

Which leads then to the joy of this market thing. Companies that do define themselves by these values get to compete for the attentions of those who care about such things. Those catering to the rarer prejudices will either fail or stay small, those who cater to the mass ones successfully will prosper and grow fat. Which is excellent, isn’t it?

May 18, 2012

SpaceX Dragon smuggling secret cargo to ISS

Filed under: Space, Technology, USA — Tags: , , , — Nicholas @ 08:35

At The Register, Brid-Aine Parnell gets all conspiracy theorized:

Just to add some icing to the SpaceX Dragon launch cake, the cargoship may be carrying a secret payload that nobody knows about.

The first ever commercial spacecraft to dock with the International Space Station, due to go up tomorrow, will already be carrying nonessential food, student science projects, clothes and other supplies for the ISS crew, but Elon Musk’s firm has also hinted there could be something else aboard.

On the last test flight of the Dragon, the craft carried a Top Secret cargo SpaceX refused to reveal to anyone until after mission, which turned out to be a lovely big wheel of cheese in an homage to the classic Monty Python sketch in the cheese shop.

On a slightly more serious level, Jonathan Amos has this report at the BBC News site:

Although billed as a demonstration, the mission has major significance because it marks a big change in the way the US wants to conduct its space operations.

Both SpaceX and another private firm, Orbital Sciences Corp, have been given billion-dollar contracts to keep the space station stocked with food and equipment. Orbital hopes to make its first visit to the manned outpost with its Antares/Cygnus system in the coming year.

Lift-off for the Falcon is timed for 04:55 EDT (08:55 GMT; 09:55 BST). It is going up from Cape Canaveral Air Force Station.

The ascent phase should last a little under 10 minutes, with the Dragon capsule being ejected just over 300km (185 miles) above the Earth.

The conical spaceship will then deploy its solar panels and check out its guidance and navigation systems before firing its thrusters to chase down the station.

A practice rendezvous is planned for Monday when Dragon will move to within 2.5km (1.5 miles) of the station.

If Nasa and SpaceX are satisfied that the vehicle is performing well, it will be commanded to fly up and over the outpost in preparation for close-in manoeuvres on Tuesday.

May 17, 2012

Defining “sustainability”

Ben Pile explains what is really meant by the term “sustainability” and the real agenda of those who argue for it:

Another reason might be that the concepts of ‘global’ and ‘sustainability’ are at best nebulous. To what extent are ‘global problems’ really global? And to what extent can making and doing things ‘sustainably’ really address problems such as poverty and inequality? Poverty is not, in fact, a problem of too much exploitation of natural resources, but too little. And poverty is not a global problem, but a categorically local one, in which a population is isolated from the rest of the world.

We can only account for poverty and inequality in the terms preferred by environmentalists if we accept the limits-to-growth thesis and the zero-sum game that flows from it. In other words, that there are limits on what we can take from the planet and we can only solve poverty if we divide those limited resources more equitably. Such an argument for reducing and redistributing resources has the reactionary consequence of displacing the argument for creating more wealth.

But to date, the arguments that there exist limits to growth, an optimum relationship between people and the planet, and that industrial society is ‘unsustainable’, have not found support in reality. The neo-Malthusians’ predictions in the Sixties and Seventies were contradicted by growth in population and wealth. And now there is a growing recognition that the phenomenon most emphasised by environmentalists — climate change — has been overstated. [. . .]

‘Sustainability’ is not about delivering ‘what we want’ at all but, on the contrary, mediating our desires, both material and political. Accordingly, the object of the Rio meeting is not as much about finding a ‘sustainable’ relationship between humanity and the natural world as it is about finding a secure basis for the political establishment. The agenda for the Rio +20 conference is the discussion of ‘decent jobs, energy, sustainable cities, food security and sustainable agriculture, water, oceans and disaster readiness’. Again, noble aims, perhaps. But is the provision of life’s essentials, and the creation of opportunities for jobs and the design of cities, really a job for special forms of politics and supranational organisations?

The idea that there are too many people, or that the natural world is so fragile that these things are too difficult for normal, democratic politics to deliver, flies in the face of facts. It would be easier to take environmentalists and the UN’s environmental programmes more seriously if millions of people were marching under banners calling for ‘lower living standards’ and ‘less democracy’. Instead, just a tiny elite speaks for the sustainability agenda, and only a small section of that elite is allowed to debate what it even means to be ‘sustainable’. We are being asked to take at face value their claims to be serving the ‘common good’. But there is no difference between the constitutions of benevolent dictatorships and tyrannies.

Sustainability is a fickle concept. And its proponents are promiscuous with scientific evidence and ignorant of the context and the development of the sustainability agenda, believing it to be simply a matter of ‘science’ rather than politics. The truth of ‘sustainability’, and the meeting at Rio next month, is that it is not our relationship with the natural world that it wishes to control, but human desires, autonomy and sovereignty. That is why, in 1993, the Club of Rome published its report, The First Global Revolution, written by the club’s founder and president, Alexander King and Bertrand Schneider. The authors determined that, in order to overcome political failures, it was necessary to locate ‘a common enemy against whom we can unite’. But in fighting this enemy — ‘global warming, water shortages, famine and the like’ — the authors warned that we must not ‘mistake symptoms for causes’. ‘All these dangers are caused by human intervention in natural processes, and it is only through changed attitudes and behaviour that they can be overcome. The real enemy then is humanity itself.’

Official response to UN’s Special Rapporteur on the right to food

Filed under: Cancon, Government, Health, Politics — Tags: , , , , , — Nicholas @ 00:09

As you’ll know if you’ve been visiting the blog for a while, I’m not a cheerleader for the federal government and I often disagree with their policies and statements. However, I can’t find much to disagree with in this:

May 16, 2012 (OTTAWA, ON) — The Honourable Leona Aglukkaq, Minister of Health, and Minister of the Canadian Northern Economic Development Agency, today issued the following statement:

Today I met with Olivier De Schutter, the UN’s Special Rapporteur on the right to food.

As an aboriginal person from the North, I was insulted that Mr. Schutter chose to “study” us, but chose not to “visit” us.

In fact, Mr. De Schutter confirmed to me that he did not visit a single Arctic community in Canada during nearly two weeks of travel within Canada.

I asked him what stance he would take in his report on uninformed, international attacks on the seal and polar bear hunt that make it harder for aboriginal hunters to earn a livelihood. I told him that I would be reviewing his final report closely, to see if he makes any recommendations to activist groups to stop interfering in the hunting and gathering of traditional foods.

I was concerned that he had not been fully informed of the problems with the discontinued Food Mail program that subsidized the shipping of tires and skidoo parts, as opposed to Nutrition North, which improves access to nutritious and perishable foods.

He made several suggestions that would require the federal government to interfere in the jurisdiction of other levels of government. It was clear that he had little understanding of Canada’s division of powers between the federal, provincial and municipal levels of government despite his extensive briefings with technical officials from the Government of Canada.

Our government is surprised that this organization is focused on what appears to be a political agenda rather than on addressing food shortages in the developing world. By the United Nations’ own measure, Canada ranks sixth best of all the world’s countries on their human development index. Canadians donate significant funding to address poverty and hunger around the world, and we find it unacceptable that these resources are not being used to address food shortages in the countries that need the most help.

-30-

May 16, 2012

Scotland’s latest moral panic, soon to spread to England

Filed under: Britain, Government, Health, Liberty — Tags: , , , — Nicholas @ 09:00

A spectre is haunting Scotland: the spectre of cheap booze and binge drinkers. The most recent regulatory answer, raising the minimum price of alcohol, won’t solve the problem.

Scotland announced minimum pricing for alcohol this week, at 50p a unit; the price of the cheapest spirits will now rise by almost 50%. It will arrive in England soon, although possibly at the more timid rate of 40p per unit. It will only make a tiny difference, says the government, as it contemplates raising prices for a commodity almost all citizens enjoy (86% of the adult population drink alcohol), and at a time when prices are rising everywhere.

So why bother doing it? The government says it will save lives, even as it announces the speed limit on some motorways will be raised to 80mph, which will cost lives. I am not sure if the deaths created on the roads will be offset by the lives saved from gin, but it seems that more deaths on the roads are acceptable, but more deaths from alcohol are not. Do I smell snobbery? David Cameron says that alcohol “generates mayhem on our streets and spreads fear in our communities” — so I suppose I do.

Minimum pricing is a result of a national moral panic about alcohol, which follows on the trail of moral panics about tobacco and obesity, which are created by the tabloids and their beloved pictures of girls vomiting into gutters with their skirts hitched round their waists; there is a whole crocodile of moral panics, squeezing its way into Downing Street as more important issues are ignored.

[. . .]

Drinking is something that terrifies some but delights many. Drinkers can be ghastly, but so can politicians, and so can sober politicians. Minimum pricing comes from an ancient place – the desire for a neat society – and it expresses Cameron’s desire to appear to be doing something, while he does nothing elsewhere. Where one stands on minimum pricing depends entirely on whether you believe it is a person’s unalienable right to get shit-faced drunk at the market price, no matter what your income. When so many rights are threatened, who would dispute it?

Nanny knows best, part MCMLXII

Filed under: Britain, Health, Politics — Tags: , , , , — Nicholas @ 08:46

Chris Snowdon at the Adam Smith Institute blog:

When we scheduled the release of The Wages of Sin Taxes for 15th May, we did not guess that it would be sandwiched between the announcement of a 50p minimum price for alcohol in Scotland (Monday) and a new campaign for sin taxes on food and soft drinks (today). Writing in the British Medical Journal, two academics have just called for price hikes on sugar-sweetened beverages and ‘junk food’ as a way of dealing with Britain’s alleged obesity epidemic.

Obesity rates, like drinking rates, have not actually risen for ten years, but the same decade saw the medical profession gain an uncanny grip on the nation’s political process and they are in no mood to relinquish it. Taking a break from hassling smokers and drinkers, the mandarins of public health have taken the ‘next logical step’ and moved on to the general population.

“Economists generally agree,” they write, “that government intervention, including taxation, is justified when the market fails to provide the optimum amount of a good for society’s wellbeing.” Even if this dubious statement were true, there has never been a time when the market offered more choice in what we eat than drink than today. And, contrary to popular belief, it is much cheaper for a family to subsist on fresh fruit and vegetables than it is to eat out at McDonalds three times a day. For the spokespeople of public health, the problem is not that there is a lack of options, but that we plebs are not choosing the right ones.

Defining junk food is notoriously difficult. As Rob Lyons explains in his excellent book Panic on a Plate, a portion of McDonalds fries contains a quarter of an adult’s recommended intake of Vitamin C, while middle class favourites like olive oil, parmesan and pasta are rather fattening. A tax on “sugar sweetened beverages” will presumably leave apple juice and smoothies untouched, despite the fact that fruit juices are often sweeter and more calorific than Coca-Cola.

May 14, 2012

Scottish minimum alcohol pricing: “Health fascism is back with a vengeance”

Filed under: Britain, Bureaucracy, Government, Health, Liberty — Tags: , , , , — Nicholas @ 09:30

A released statement from Sam Bowman, Head of Research at the Adam Smith Institute, responding to Scotland’s minimum alcohol price decision:

“Minimum alcohol pricing is a miserable, Victorian-era measure that explicitly targets the poor and the frugal, leaving the more expensive drinks of the middle classes untouched. It’s regressive and paternalistic, treating people as if they’re children to be nannied by the government.

“To make things worse, all signs suggest that the minimum price will be successively raised once it’s in place. This is what happened in the UK with alcohol and tobacco taxes, which are now among the highest in the world. It’s like boiling a frog – bring in a low minimum price that only affects the most marginalized part of society, the poor, and raise it gradually every year without people noticing.

“The reality is that Britain does not have a drink problem. The definition of “binge drinking” has been redefined so that a grown man drinking more than two pints of lager is considered to be “binging”. The number of diseases defined as “alcohol-related” has tripled in the last twenty-five years. In fact, we drink less than we did ten years ago, less than we did one hundred years ago, and far less than we did in the 19th Century. Hysteria about drinking alcohol is a red herring invented by the health lobby. Health fascism is back with a vengeance, and minimum alcohol pricing is just another brick in the wall.”

Dragon flight now scheduled for May 19

Filed under: Space, Technology — Tags: , , — Nicholas @ 09:24

Brid-Aine Parnell at The Reg updates us on the SpaceX flight schedule:

The flight of the Falcon 9 has once more been rescheduled, with a new launch date of 19 May, as Elon Musk’s SpaceX decided to tweak the software one more time.

The first commercial craft to restock the International Space Station, a Dragon capsule strapped to a Falcon 9 rocket, has seen more than its fair share of push-backs for the test flight, but it will all pay off if the cargo ship can dock with the station.

SpaceX has already shown it can release and retrieve the Dragon, but getting it to motor alongside the fast-moving ISS and accurately berth with it is no mean feat and the firm has tested and retested the necessary software in the hopes it won’t end up with egg on its face.

[. . .]

Providing this test flight is successful, the Dragon will start to fulfil the contract for a minimum of 12 flights to resupply the ISS. Since the ship is reusable, it will be the only spacecraft capable of bringing cargo back with it as well. And, ultimately, SpaceX hopes that a version of the Dragon will be its first manned spaceship as well.

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