Wake Me Up Before You Go-Go

The dreaded Monday morning alarm clock takes on an extra dimension tomorrow when it will rouse a slumbering spacecraft that is hurtling back towards our Sun from the darkest reaches of the solar system. 

ESA’s Rosetta probe is chasing comet 67P/Churyumov–Gerasimenko at intergalactic speeds and later this year will close in for a high speed rendezvous with the comet before ejecting a lander called Philae towards its surface.

Since its launch in 2004, Rosetta has made three flybys of Earth and one of Mars to build up enough speed and get on a trajectory towards the comet. It has also encountered asteroids Steins and Lutetia along the way.

Operating on solar energy alone, the spacecraft was placed into a deep space hibernation in mid-2011 as it cruised far from the Sun and out towards the orbit of Jupiter. 

To prepare for its long sleep, Rosetta was oriented so that its solar arrays faced the Sun and put into a once per minute spin for stability. The only devices left running were its computer and several heaters.

Thirty-one months later, Rosetta’s orbit has brought it back to within ‘only’ 673 million km of the Sun where there is finally just enough solar energy to power the spacecraft fully again. It is time to wake up.

Tomorrow morning Rosetta’s computer is programmed to carry out a sequence of events to re-establish contact with Earth, starting with an ‘alarm clock’ at 10:00 GMT. Immediately afterwards, the spacecraft’s star trackers will begin to warm up, taking around six hours.

Then its thrusters will fire to stop the slow rotation and a slight adjustment will be made to Rosetta’s orientation to ensure that the solar arrays are still facing directly towards the Sun, before the star trackers are switched on to determine the spacecraft’s attitude.

Once Rosetta has regained its bearings the spacecraft will turn directly towards Earth, switch on its transmitter and point its high-gain antenna to send a signal to announce that it is awake.

Because of Rosetta’s vast distance – just over 807 million km from Earth – it will take 45 minutes for that signal to reach ground stations so the first opportunity for receiving a signal on Earth is expected between 17:30 and 18:30 GMT.

Once mission controllers have verified Rosetta’s health, each of its scientific instruments will be switched back on and checked, an effort that will take several months as the spacecraft continues to eat up the remaining 9 million km separating it from the comet.

During May the spacecraft must pull off a tricky braking manoeuvre to slow its approach relative to the speed comet to walking speed - and if that goes to plan it will cruise alongside in August.

Once alongside the 4 km wide comet, Rosetta will steer itself into an orbit that takes it within 20 km of the surface. From here, its cameras will map the surface and search for a landing spot for Philae.

With gravity too weak to hold it on the surface, the sophisticated box of electronics and sensors attached to spindly legs will cling to its interplanetary roller coaster with an explosive metal harpoon.

Comets like 67P/Churyumov–Gerasimenko probably formed some 4.6 billion years ago and are considered to be the primitive building blocks of the Solar System that may have helped ‘seed’ Earth with water.

In a spectacular series of firsts for space exploration, Rosetta will become the first space mission to rendezvous with a comet, the first to attempt a landing, and the first to follow a comet as it swings close to the Sun.

Many fundamental questions about these enigmatic and ancient objects of the solar system remain - but first there is that all important wake-up call.

A note on the title of this report - ‘Wake Me Up Before You Go-Go’ was a two-million-selling  pop song from the early 1980s by the English pop duo Wham! Written and produced by George Michael, it became the group’s first number one hit in both America and the UK.

Space Station top ten

The Obama administration has given NASA the go-ahead to operate the International Space Station (ISS) until at least 2024 but many of its scientific achievements to date remain largely unsung to the population at large. 

The US decision means partner agencies, US government establishments and private-sector researchers from around the world can now count on at least another decade of orbital operations.

Bill Gerstenmaier, chief of space operations at NASA Headquarters, said the expanded lifetime will encourage increased commercial use of the lab complex, solidify the commercial launch market and provide critical insights into technology development and human physiology needed for eventual flights to deep space targets like Mars.

But what of the scientific value of such a challenging, and ultimately costly, enterprise like the International Space Station?

In September at the 64th International Astronautical Congress (IAC) in Beijing, China, delegates were treated to an inspiring presentation by NASA’s Dr Julie Robinson, International Space Station Program Scientist at the Johnson Space Center (JSC).

Dr Robinson, who coordinates the International Space Station (ISS) science programme and is author of ‘ISS Benefits for Humanity’ (published by NASA in 2012) spoke on the ‘Top 10 Research Results from Space Station’.

She provided historical context to her personal choice by stating the fundamental reason humans explore is not being motivated  by the advancement of science.

“Early explorers travelled the world to exploit economic opportunities not to inspire their children about it,” she said. “Explorers are responsible for pushing the boundaries and the scientists follow behind.”

Dr Robinson described the ISS as “the most complex machine ever built by humans” and told delegates that it was easy to be “uniformed” about some of the great results coming from the Space Station.

“The Space Station is unique in that it supports almost every scientific discipline in some way,” she explained.

“Ultimately it will be judged on its engineering achievements, international achievements and science achievements. We are now in the research stage and this is very important to our stakeholders - 69 countries have participated in ISS utilisation so far.” 

In selecting a personal ‘top 10',  Dr Robinson took into account a variety of criteria - scientific journal quality, comments and reviews by other scientists, cases where novel information was presented, and benefits to humankind - all of which she described as important considerations in terms of research legacy.

Number 10 - preventing loss of bone mass in space through diet and exercise; if astronauts do the right set of exercises, have the correct amount of vitamin D and calories in their diet then they come home okay. Resistive exercise now helps treat osteoporosis cases on Earth.

Number 9 - understanding the mechanism of osteoporosis and developing new drugs to treat it. The first new drugs for treating muscle waste are now on the market as a result of research in microgravity.

Number 8 - Hyper-spectral imaging for water quality in coastal bays. A ‘gold standard’, according to Dr Robinson, which also allows scientists to distinguish between sediment pollution on satellite imagery.

Number 7 - Colloid self-assembly using electron fields for nano particles, a process which is impacting manufacturing processes on Earth.

Number 6 - New process of cool flame combustion - an unexpected and novel result. In microgravity, flames burn differently forming flaming spheres that turn out to be mini-labs for combustion research. Unlike flames on Earth, which expand greedily when they need more fuel, flame balls let the oxygen come to them.

Number 5 - A pathway for bacterial pathogens to become virulent; bacteria can become more virulent in space. Studying this helps develop new treatments and is an example of where biological science can make a significant advance by going into a different environment.

Number 4 - educational outreach, with 43 million students from all over the globe.

Number 3 - Dark matter is still out there according to the first data gathered from the ISS Alpha Magnetic Spectrometer (AMS) the most sophisticated detector of gamma cosmic rays that has ever been built.

Number 2 - Robotic assistance for brain surgery - the technology that went into developing neuroArm, the world’s first robot capable of performing surgery inside magnetic resonance machines, was born of the Canadarm.

Number 1 - A new targeted method of chemotherapy drug delivery with medical trials now underway as a result of ISS medical developments. It involves a single step process forming tiny liquid-filled, biodegradable micro-balloons containing various drug solutions (a process called microgravity micro-encapsulation) that can provide better drug delivery for tumours.

Dr Robinson concluded: “The benefits I have selected serve as examples of the Space Station’s potential as a ground-breaking scientific research facility. 

“The ISS advances the state of scientific knowledge of our planet, looking after our health, and providing a space platform that inspires and educates the science and technology leaders of tomorrow.

“These benefits will drive the legacy of the ISS as its research strengthens economies and enhances the quality of life here on Earth for all people.”

The above article is based on one of a series of daily reports from the International Astronautical Congress 2013 held in Beijing, China, written by Clive Simpson for the Paris-based International Astronautical Association (IAF) and first appearing on the IAF website

Maximum benefit

Over the past year the Lighthouse Keeper has been following the writings and posts of fellow blogger Joshua Becker on his excellent Becoming Minimalist website.

It’s been an illuminating journey, contrasting the commercialism of modern life with an approach of de-cluttering life in general and owning less.

Becker describes minimalist living as “counter-cultural” because it is contrary to every magazine, newspaper of TV advertisement and because society prides itself on the accumulation of possessions.

“But there is far more joy to be found in the pursuit of fewer possessions than can ever be discovered in the pursuit of more,” he says.

The first month of any year is often a time when we look back on the past 12 months and evaluate the direction of our lives – maybe changing, adopting new habits, or making some healthy changes – and in his New Year post Becker asks us to consider ‘11 Resolutions for a Better You - Proven by Science’.

His key points are summarised below but if it’s wetted your appetite for more you can catch the full version, or browse the Becoming Minimalist website, by clicking here.

Exercise
Most of us recognise the benefits of physical exercise - healthy bodies, healthy minds and healthy confidence. Some studies indicate exercise contributes to a positive body image even prior to any body weight or shape change - with as little as two weeks of regular exercise.

Less television
Those seeking intentionality realise the negative influence television has on their mind - it impacts our worldview, encourages consumerism, oversimplifies life and results in less life satisfaction. Deciding to cut back in the coming year may be one of the best decisions you could ever make.

Go outside
According to recent studies published in the Journal of Environmental Psychology, simply spending time outside with nature contributes to increased energy, wards off feelings of exhaustion and results in a heightened sense of well-being.

Read fiction
Researchers have discovered that reading results in heightened connectivity and brain activity - sometimes even up to five days after the book has been completed.

Give
Numerous studies show charitable giving boosts happiness and reduce stress - especially when the generosity promotes positive social connection. If you don’t already, find a cause or person you believe in and offer consistent monthly support. They will benefit. You will benefit. And the world will be a better place.

Serve
Volunteering provides great value for our lives and the lives of those we choose to enrich. Volunteers often feel like they have more time and are more efficient, as well as feeling better about themselves, experiencing lower stress levels, and developing a deeper connection with others.

Buy less
Research suggests that buying life experiences rather than material possessions leads to greater happiness for both the consumer and those around them. Decide today to spend less money this year on possessions and more money on meaningful, memorable experiences.

Display gratitude
Psychologists state that one of the greatest contributing factors to overall happiness in your life is how much gratitude you show. Getting started is so easy and beneficial. It could be the easiest decision you make all year.

Practice smiling
A study conducted at the Michigan State Business School found that customer service professionals who fake a smile throughout the day worsen their mood. But people who smile as a result of cultivating positive thoughts improve their mood and withdraw less.

Stop and play
Our world is becoming increasingly busy and the temptation to measure our worth by external factors continues to grow. As a result, taking time to slow down and just play is becoming increasingly rare. But play is fun and enjoyable. Play enriches the lives of children by exercising their mind and body. And it has the same positive effect on adults.

Be happy
Two experimental studies published in The Journal of Positive Psychology this past year offer ground-breaking research on the cultivation of happiness. Based on the experiments, participants who listened to ‘happy’ or uplifting music and actively tried to feel happier reported the highest level of positive mood afterwards - more so than those who simply listened to the music. In other words, determining to be happy is a productive decision towards achieving it.

Of course, changing everything at once is a recipe for failure so Becker suggests choosing just one or two - and giving them a month-long try out.

The Lighthouse Keeper, having heartily digested the recommendations over a cup of strong early New Year coffee and a leftover Christmas mince pie or two, can definitely see life-changing merit in all 11 resolutions – but which ones to pick?

I'm also tempted to complete the list by adding a couple of my own. Drink more water to keep the body well hydrated at all times and don’t neglect your spiritual side. Both bring untold and life-transforming benefits.

Thank you, Mr Becker, for a year of inspiring and thought-provoking reads. Here’s to 2014 – toasted, of course, with a glass of H20!
 

The End of Night

The bright lights of Europe spilling into the night as seen from the Space Station.

Night is no longer as dark as it used to be. Street lamps, neon signs, ‘security' lights and the rest all contribute to an ever-present glow that has transformed the natural world and turned modern life into a wash of artificial light.

It is a theme the Lighthouse Keeper has looked at in several blog essays this autumn, partly inspired by one of this summer's best-selling books ‘The End of Night', written by US-based journalist Paul Bogard.

Light pollution around the world has expanded exponentially in recent decades and now it is reckoned that the vast majority people across Western Europe and the United States no longer experience a truly dark night.

Night's natural darkness is invaluable for our spiritual health and the health of the natural world and as a consequence every living creature, including ourselves, suffers from its loss.

Like the advancement of technology it is one of those things that changes subtly against the backdrop of busy lives – and almost without noticing we become accustomed to a new ‘normal'.
 

The Bortle scale, which classifies the darkness of skies from point of view of an astronomer, 
was originally published in Sky & Telescope magazine in 2001 and is an apt illustration for Bogard’s theme.

 
In his book, Bogard investigates the meaning of darkness and travels to some of the world's intensely lit cities - from Paris, the ‘city of light' to glittering Las Vegas and to still gas-lit streets of London's Westminster district, meeting an inimitable range of characters along the way.

Bogard contrasts the skies above our cities and urban populations to some of the most remote and darkest places on the globe, like the great national parks in America and the Island of Sark off the British coast.

He discusses how light is negatively affecting the natural world, how our well-being is significantly influenced by darkness or its lack, and how it's not a matter of using light at night or not, but rather when and where, how and how much.

Travelling the world looking for dark skies, Bogard considers our affinity for artificial light, the false sense of security it provides, and its implications.

He covers such broadly diverse issues as the health impacts of working the night-shift to the persecution of bats, and urges the reader to weigh the ramifications of light pollution and our failure to address them.  

The growth of light piollution across the United States, including
a projection for the year 2025.

 
"We think that because of television, the internet, or jet travel we see a lot of the planet," says Bogard.

"But the only chance we really have to retain our sense of the scale in the real universe is by looking at the night sky."

As we approach the winter solstice when the dark nights of the northern hemisphere reach their longest, what better time to delve into such a book?

Bogard's evocation of the night blends environmental and cultural history to make reading about light pollution a surprising pleasure.

By reclaiming the night we stand only to gain. Not least in decreased energy costs and redressing the balance of life but also in that other fast-disappearing phenomenon - wonder.

Bogard draws attention to the naturally dark night as a landscape in its own right - a separate, incredibly valuable environment that we overlook and destroy at our own peril.

‘The End of Night’ by Paul Bogard
is published by Fourth Estate and
is available at your local bookshop
or from Amazon.

Polar ice melt

Three major glaciers in West Antarctica (Pine Island, Thwaites and Smith) are melting into the Amundsen Sea faster than previously thought.

ESA’s Cryosat polar orbiting spacecraft possesses the capability to observe features in more detail than previous missions and has revealed that the region is now losing more than 150 cubic km of ice into the sea every year.

Cryosat was launched in 2010 with a radar specifically designed to measure the shape of ice surfaces - and its latest results indicate the loss appears to be accelerating

The data, presented at the recent American Geophysical Union (AGU) in San Francisco, show that the loss of ice equates to a 15 percent increase in West Antarctica's contribution to global sea level rise.

Prior to Cryosat, scientists concluded that ice losses from West Antarctica had pushed up global sea levels by some 0.28 mm a year between 2005 and 2010. The new Cryosat data starts from the end of that period.

Scientists say that ice at the Pine Island, Thwaites and Smith glacier ‘grounding lines’ - the places where the ice blocks split from the land and begin to float out over the ocean - is now thinning by between four and eight metres per year.


Three years of CryoSat measurements show that
the West Antarctic Ice Sheet is losing over
150 cubic kilometres of ice each year.

Launched in 2010, CryoSat carries a radar altimeter that can ‘see’ through clouds and in the dark, providing continuous measurements over areas like Antarctica that are prone to bad weather and long periods of darkness.

The radar can measure the surface height variation of ice in high resolution, allowing scientists to calculate its volume accurately.

Prof Andrew Shepherd of Leeds University, who led the West Antarctica study, said that part of the increase of ice loss could be due to faster thinning and part may also be down to CryoSat’s capacity to observe previously unseen terrain.

The mission has also provided three consecutive years of accurate Arctic sea ice thickness measurements, which show that ice covering Earth’s north polar region continues to thin.

Prof Shepherd added: "CryoSat continues to provide clear evidence of diminishing Arctic sea ice.

"From the satellite’s measurements we can see that some parts of the ice pack ice have thinned more rapidly than others, but there has been a decrease in the volume of winter and summer ice over the past three years.

"The volume of the sea ice at the end of last winter was less than 15 000 cubic km, which is lower than any other year going into summer and indicates less winter growth than usual."

Sleeping satellite

If all goes to plan China’s Chang'e 3 probe will land on the Moon at the end of next week and open up a new era of lunar exploration.

The mission is a symbol of China's power and prowess. But look behind the political smokescreen and there is a sharp commercial edge to the country’s space ambitions.

Forty plus years ago it was the United States that inspired a generation growing up in the 1960s by making the ‘giant leap’ from Earth to the Moon.

Capitalism proved it could be first but it was more of a means to an end and became politically unsustainable even before the last men left the Moon in 1972.

How fortunes have changed. Communist China is now the world’s leading and most buoyant economy and has its sights set firmly on the opportunities presented by our nearest planetary neighbour.

Chang'e 3 is scheduled to land on 14 December in a region known as Bay of Rainbows, or Sinus Iridum, located on the upper-left part of the full Moon as viewed from Earth.

The mission blasted off from Xichang in the south of the country at 17.30 GMT on Sunday (1 December) and the spacecraft’s landing module includes a six-wheeled robotic rover called Yutu (translated as Jade Rabbit).

It will be China's first lunar rover as well as becoming the first spacecraft since the Soviet Luna 24 mission in 1976 to make a soft landing on the Moon,

According to information released by its design company the Shanghai Aerospace Systems Engineering Research Institute, the 120 kg Jade Rabbit rover can climb slopes of up to 30 degrees and travel at 200 m per hour.

Its name - chosen in an online poll of 3.4 million voters - derives from an ancient Chinese myth about a rabbit living on the Moon as the pet of the lunar goddess Chang'e.

Both the rover and lander are powered by solar panels but some sources suggest they also carry radioisotope heating units (RHUs) containing plutonium-238 to keep them ‘warm’ during the cold lunar night.

The mission - which will explore the Moon's surface and search for evidence of natural resources such as rare metals - carries a sophisticated payload, including ground-penetrating radar which will gather measurements of the lunar soil and crust.

It marks a milestone in China's ambitious long-term space exploration programme, which includes establishing a permanent space station in Earth orbit.

Future planned launches include a flight to bring back samples of lunar soil to Earth and ultimately sending Chinese nationals to the Moon, in what would likely be the first manned lunar missions since the US Apollo programme in the late 1960s and 1970s.

China knows the Moon is full of plunder that is there for the taking - mainly rare earth elements like titanium and uranium that Earth is really short of. And one day these valuable resources can be mined without limitation.

With NASA currently lacking even its own rocket and relying on the Russians to transport its astronauts to the International Space Station (ISS) it seems, in the words of the chart-topping song ‘Sleeping Satellite’, that the West may have ‘peaked too soon’.

It was the debut single by the British singer-songwriter Tasmin Archer and, in the light of China’s Moon mission and ambitious plans, the lyrics are more poignant than when it was released in 1992.

I blame you for the moonlit sky and the dream that died with the eagles' flight; I blame you for the moonlit nights when I wonder why are the seas still dry? Don't blame this sleeping satellite.
Did we fly to the moon too soon; did we squander the chance in the rush of the race; the reason we chase is lost in romance; and still we try to justify the waste for a taste of man's greatest adventure.

"It's not intended as anti-space travel," says Archer. "It's just the opposite and bemoans the fact that at the time of the anniversary the initiative had not been progressed from the original achievement."

The US may never quite catch up again and will probably one day rue the decision made by its politicians not to re-visit our ‘Sleeping Satellite’ sooner. Perhaps Archer is right and they did peak too soon - and lost a collective sense of adventure in the process.

Tasmin Archer performing 'Sleeping Satellite' at the
SECC in Glasgow in 2008.

Upping the tempo

New figures released by two climate research bodies confirm that ‘greenhouse gases’ continue to build in Earth’s atmosphere and that average global temperatures made September 2013 the fourth warmest on record.

According to the World Meteorological Organisation’s (WMO) annual greenhouse gas bulletin, published this month, the levels of gases in the atmosphere that are driving climate change increased to a record high in 2012.

Atmospheric carbon dioxide (CO2) grew more rapidly in the year than its average rise over the past decade - and concentrations of methane and nitrous oxide also broke previous records.

The WMO has produced an annual greenhouse gas bulletin for the past nine years and says the warming effect on our climate as a result of carbon dioxide and other gases has increased by almost a third since 1990.

Carbon dioxide is the most important of the gases WMO tracks but only about half of the CO2 that is emitted by human activities remains in the atmosphere, with the rest being absorbed by the plants, trees, the land and the oceans.

Since the start of the industrial era in 1750,global average levels of atmospheric CO2 have increased by 141 percent.

"The observations highlight yet again how heat-trapping gases from human activities have upset the natural balance of our atmosphere and are a major contribution to climate change," said WMO Secretary-General Michel Jarraud.

"It is a worry - the more we delay action the bigger the risk we cannot stay under the 2C limit that countries have agreed," he added.

While the daily measurement of carbon dioxide in the atmosphere exceeded the symbolic 400ppm mark in May this year, the global annual average CO2 concentration will cross this point in 2015 or 2016, says the WMO.

Levels of methane also reached record highs in 2012 maintaining an upward trend since 2007 which has followed a period when they appeared to be levelling off.

Recent research indicates that the rate of increase in emissions might be slowing down - but even so the gases can continue to concentrate in the atmosphere and exert a climate influence for hundreds if not thousands of years.

Scientists suggest that the new data indicates that, after a slowdown in the rate of temperature increases over the past 14 years, global warming is returning with a vengeance.

"For the past decade or so the oceans have been sucking up this extra heat, meaning that surface temperatures have only increased slowly," said Prof Piers Forster of Leeds University.

"Don't expect this state of affairs to continue though - the extra heat will eventually come out and bite us, so there will be strong warming over the coming decades."

Should we be surprised? Not really. In September the UN's climate science panel, the IPCC, said that atmospheric CO2 concentrations were at levels ‘unprecedented in at least the last 800,000 years’.

The last time so much greenhouse gas was in the air was several million years ago, when the Arctic was ice-free, savannah spread across the Sahara desert and sea levels were up to 40 metres higher than today.

But, as the WMO points out, the amount of CO2 in the atmosphere is only half of the picture as much of the CO2 is being absorbed by the oceans.

Annual worldwide emissions from power plants, cars and other human activities are currently several billion tonnes too high to keep global temperature rises below 2C and show no sign of stopping.

Other figures released recently by NOAA’s National Climatic Data Center under its ‘State of the Climate: Global Analysis for September 2013' show the combined average temperature over global land and ocean surfaces for September 2013 tied with 2003 as the fourth highest for September on record - at 0.64C above the 20th century average of 15.0C.

The global land surface temperature was 0.89C above the 20th century average of 12.0C, marking the sixth warmest September on record.

For the ocean, the September global sea surface temperature was 0.54C above the 20th Century average of 16.2C, tying with 2006 as the fourth highest for September on record.

The combined global land and ocean average surface temperature for January to September was 0.6C above the 20th century average of 14.1C, tying with 2003 as the sixth warmest such period on record.