Cargo Ship Launches to the Station

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Although Atlantis is getting ready for its trip back to the International Space Station, it won’t be the only visitor. An unmanned Progress cargo ship blasted off from the Baikonur Cosmodrome in Kazakhstan today, bringing fresh supplies to the International Space Station. The Americans call it Progress 28, while the Russians have designated it M-63.

Let’s pick a designation and call it Progress M-63. The spacecraft lifted off at 4:03 p.m. local time, carrying a load of oxygen, water and food for the crew: US astronauts Peggy Whitson and Daniel Tani and Russian cosmonaut Yiri Malenchenko. It’s also carrying scientific equipment and experiments.

To make room for the inbound cargo ship, the previous Progress M-62 undocked from the station on Monday. It had been docked to the station since December 26, 2007. It will now spend the next few weeks performing a series of autonomous tests.

And in late February, another cargo ship, M-60 will be discarded into the Pacific Ocean, 3,000 km from New Zealand.

Original Source: NASA News Release

Mars in Thrilling 3-D!

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I know this is going to sound like an advertisement for a B-movie, but you can see Mars in 3-dimensions, thanks to a new set of data released by the European Space Agency. The images were captured by its Mars Express spacecraft using special techniques so they could later be stitched together into 3-dimensional images. Next up, Smell-O-Vision?

ESA announced the release to the Internet of their new Digital Terrain Model data set today. When you’re looking at bird’s eye images of terrain, it’s hard to get a sense of elevation, or features of the surrounding topography. These models recreate a 3-dimensional view of the terrain so that scientists can virtually “stand” on a planetary surface and look around.

The image associated with this story is of Olympus Mons, the tallest mountain in the Solar System. The different colours are associated with different elevations.

To build these kinds of images in the past, you needed a spacecraft to make multiple passes over terrain. This is just like how you can construct a 3-dimensional model in your brain. Because you use two eyes, the multiple images can be stitched together to give a stereo view.

But Mars Express is different. Its High Resolution Stereo Camera can build up 3-D images in just a single pass. It has 9 individual scan lines that point ahead, behind, and straight down. It can then gather everything it needs by passing over terrain. Scientists back on Earth can stitch the images together on computer to create the 3-dimensional view.

It’s also equipped with a laser altimeter instrument that allows it to measure the height to every point it sees. This helps build up a topographical map of the terrain.

One of the best ways to look at the images coming back from Mars is with the HRSC Image viewing tool. Check it out.

Original Source: ESA News Release

Hubble Sees an Ancient Elliptical Galaxy

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As galaxies come together through successive mergers they take on the splendid spiral shape like our own Milky Way. Keep merging those larger galaxies, though, and you’ll eventually get an elliptical galaxy – a gigantic diffuse cloud of ancient stars with little structure. Such a galaxy, NGC 1132, was recently photographed by the Hubble Space Telescope.

The elliptical galaxy NGC 1132 belongs in this class of galaxies called “giant ellipticals”. And the galaxy, with its constellation of dwarf galaxies is known as a “fossil group”. They’re the remnants and wreckage from past collisions between large galaxies.

In visible light, NGC 1132 looks like a single, isolated galaxy. But using a technique called gravitational lensing to map out the surrounding dark matter, astronomers found that it resides in a huge cloud of the stuff. In fact, NGC 1132 has as much dark matter as you might find in a group of tens or even hundreds of galaxies.

And once again, in visible light, its stars extend 120,000 light years from its centre. But in the X-ray spectrum, the glow extends 10 times as far – again, similar to a group of galaxies.

So where do fossil groups like this come from? Astronomers think they’re the end product of cosmic collisions, where a single large galaxy consumes all of its neighbors. It’s also possible they’re the result of a strange process, where something stopped moderate galaxies from forming, and only a single large galaxy came together in that region of space.

By analyzing galaxies like this, astronomers will get a better sense of galaxy evolution. It’ll help predict what’s going to happen when the Milky Way and Andromeda collide billions of years in the future.

Original Source: ESA/Hubble News Release

Book Review: Astronautics

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Who would not be chastened at the impish pleasures shown by Icharus. He let his vision beguile him ever higher until the environment of space ruined his aspirations. Perhaps this was the beginning of humankind’s venture into space, it just took awhile to bear fruit. Nevertheless, most people begin our space age with the successful launch of Sputnik. Ted Spitzmiller uses this event to begin his two volume book-set, Astronautics – A Historical Perspective of Mankind’s Efforts to Conquer the Cosmos. Within it, he chronicles 50 years of the technical progress that put reality into so many dreams of yesteryears.

Astronautics refers to events of human derivation that occur at greater than 100 kilometres above the Earth’s surface. People, rockets, probes, missiles, debris have all achieved this arbitrary yet wondrous height. For at that lofty elevation, the Earth’s gravity becomes less an issue while the harsh and empty vastness of the remainder of space prevails upon the senses. Yet, our space age began as a technical race and has remained fairly solidly ensconced in the domain of the technophile. Passion could not raise a rocket off Earth, but liquid hydrogen, bell shaped thrust chambers and turbo pumps could. Such a technical bent thus accompanies any perspective of humankind and space.

Spiztmiller’s books do cover the 50 years of humankind in space. And, they do so from the direct perspective favoured by the technically inclined. For within the books, loads of facts and figures draw the reader ever further into rocketry, its difficulties and its achievements. And, being an historical perspective, there’s no surprises. Book 1 provides the standard, brief accolade to the early visionaries such as Jules Verne, Tsiolkovsky and Goddard. Then, it leaps to the European practitioners, particularly, Von Braun and the German war effort. This flows into the space race and the book ends with the USA vainly trying to catch up via the Mercury program. Book 2 picks right up from there, continuing on with the race, then transitioning through Skylab and into the era of the Space Shuttle and the International Space Station. It wraps up with brief chapters on envisioned expendable launchers and Hubble replacements. Its been a busy 50 years and Spitzmiller’s book describes much of it.

As well as following the common route of space development, Spitzmiller includes some perhaps lesser known endeavours. For example, the Convair MX-774 and the French Veronique get mention. But, the focus remains on the well known, principally USA programs. And for each program, the books follow a standard pattern. A brief historical view relays the program’s purpose, political or social impacts get mentioned, technical novelties and equipment specifications follow in a list, and, last, the program’s achievements get summarized. With this, there’s little need of an author’s added value and nearly none is present. Being mostly a regurgitation of facts, these two books skip from one program to the next. The books’ chapters each describe a significant step along our space journey. The chapter’s contents are chronologically ordered and the chapters themselves are roughly chronological in order however a particular event or program may re-occur multiple times. Its been a busy time and these books well show the many advances we’ve achieved along the way.

There’s no surprise that a historical perspective of 50 years of humankind’s space history needs more than one volume. Actually, tens of volumes might still be inadequate. Hence, Spitzmiller acknowledges that his books attempt to simplify and clarify technology so as not to overwhelm the reader. And while he does achieve a reasonable balance between detail and readability, the balance also defines the audience likely to benefit. Specialist and space aficionados will find little or nothing new. Those just starting to look for an historical basis for our current space capability will find clearly delineated chapters and plenty of detail in these two books. And, though the astronautics theme is broad enough, Spitzmiller extends it further. He includes the effects of patents, the problems with bureaucracy, the impact of politics and slightly related quips such as the origination of the bionic man. Interesting it certainly is, but perhaps a little too broad in scope.

Most puzzling in these books is the lack of illustrations. A paltry quantity of pictures and sketches accompany innumerable paragraphs that include data and numbers. This may leave the reader with the feeling that spreadsheets or data tables somehow fell through a word grinder and ended up as paragraphs. For those who prefer reading data in this format, these books will be a pleasure. Others, however may find themselves skipping long expanses. In a different format, these books might have been condensible into one practical volume.

As well, Spitzmiller has fallen into the trap of being a lazy historian. That is, he compiles the information but doesn’t draw from it. After over four hundred and seventy pages of data, he provides two pages on what this might portray for the future. His consideration of the impact and value of astronautics to humankind is sorely lacking. Further, using a subtitle claiming that efforts are ‘to conquer the cosmos’ makes for a nice image but a less than accurate reflection of humankind’s efforts or the books contents. Thus, these volumes make for a ready reference for the hobbyist or general enthusiast who want encouragement that humankind can accomplish greatness, if they have the will.

Having a dream separates the visionaries from the masses. Humankind’s advances have relied upon these people with great foresight who picture a better future and then make it happen. Thus, humankind has blossomed from simple agrarians to flyers in space. Ted Spitzmiller’s two volume book-set entitled, Astronautics – A Historical Perspective of Mankind’s Efforts to Conquer the Cosmos recounts fifty years, 1957 to 2007, during which humankind began placing objects into space and living a dream that extends beyond the surface of Earth.

Read more reviews or purchase a copy online from Amazon.com

Earth’s climate will slip past “tipping point” within 100 years

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Nine key geographical factors have been highlighted as Earth’s critical climate controllers most at risk of slipping past their “tipping points”. This means that once damage reaches a certain point, there can be no recovery; the damage will continue in a downward spiral, amplifying global warming and environmental damage on historic scales. And as if climate news couldn’t get any worse, one such tipping point is only a year away… 

You can’t move these days for articles about climate change, global warming and environmental disasters. All this talk about impending doom and gloom can often lull you into a detached reverie thinking “what the hell can I do about it anyway?” Although sometimes the outlook seems hopeless, scientists are stepping up a gear to understand what is happening and why humans are having such an impact on our world. In the quest to understand the effects we are having on the planet, new research has drawn up a list of nine key factors and processes likely to change the Earth’s climate most dramatically. It is hoped that once we understand how these processes work, and how long we have until the point of no return, action could be taken to allow the climate to heal.

Prof. Tim Lenton from the University of East Anglia, UK, has identified when the tipping points are likely to occur for the nine key geological factors, and the next one is most likely going to be the collapse of the Indian summer monsoon, which is variable at best. The list is as follows (plus predicted time to tipping point):

  • Arctic sea-ice melt (approx 10 years)
  • Greenland ice sheet decay (more than 300 years)
  • West Antarctic ice sheet decay (more than 300 years)
  • Atlantic thermohaline circulation collapse (approx 100 years)
  • El Nino Southern Oscillation increase (approx 100 years)
  • Indian summer monsoon collapse (approx 1 year)
  • Sahara/Sahel greening and West African monsoon disruption (approx 10 years)
  • Amazon rainforest dieback (approx 50 years)
  • Boreal Forest dieback (approx 50 years)

Many of the factors seem obvious. The melting of the Arctic ice for instance will cause a global rise in sea levels and a loss of ice cover causing Earth’s albedo to decrease (reflectivity decreases), amplifying the greenhouse effect. Also, El Nino in the South Pacific will occur more often, causing rapid and extreme changes in the large-scale weather structure; hurricanes, flooding, droughts and unseasonal shifts in the jet stream will become more and more common.

Some of the factors are perhaps less obvious. For instance, the collapse of the Atlantic thermohaline circulation would have a counter-intuitive effect on the north Atlantic, actually cooling the waters around Europe, North America and the Arctic. The thermohaline drives the circulation of the oceans, so should the Atlantic thermohaline collapse, water from the equator will stop drifting north, providing the warmth at such high latitudes. This effect is unlikely to slow the melting of the Arctic ice-sheets, but it will have devastating effects on biodiversity in the region.

Society must not be lulled into a false sense of security by smooth projections of global change […] Our findings suggest that a variety of tipping elements could reach their critical point within this century under human-induced climate change. The greatest threats are tipping of the Arctic sea-ice and the Greenland ice sheet, and at least five other elements could surprise us by exhibiting a nearby tipping point.” – Prof Lenton

Although worrying, many of the tipping point projections could be averted should strong action be taken by the international community and individuals alike – after all, we can all contribute in some way.

Source: Telegraph.co.uk

Large Hadron Collider May Help Us Glimpse Into another Dimension

High energy collisions by the nearly-completed Large Hadron Collider (LHC) may be able to generate particles that are sensitive to dimensions beyond our four dimensional space-time. These exotic particles, called Kaluza-Klein gravitons, would be highly sensitive to the geometry of extra-dimensions, giving scientists an idea about what lies beyond our universe. If these particles are detected, and if their characteristics can be measured, then perhaps the extra dimensions predicted by string theory may be proven to exist…

How can you measure the size of a room without actually measuring it? Forget measuring the room, you can’t even see it! The room is invisible; it is outside your observational ability. But what if you could bounce sound off the walls? Even better, what if the walls of the invisible room were made up of resonant particles, producing their own sound? If the sound from these resonant particles could then be analyzed, the shape of the invisible room would be known.

According to string theory, there are many “invisible rooms” that we, as observers, cannot experience. We are confined to our three dimensions of space and one dimension of time (although this may not always be the case), otherwise known as four dimensional space-time. Elemental vibrating strings thread through our universe and predict that there may be six or seven extra dimensions coexisting. Although we cannot directly experience the dimensions beyond the normal four, can we measure the characteristics of string vibrations travelling from these extra dimensions into our observable universe?

In new research published by Gary Shiu, Bret Underwood, Kathryn Zurek at UW-Madison and Devin Walker at UC-Berkeley, quantum particles have been theorized to have the ability to resonate with dimensions beyond our universe; beyond the 4th dimension, considered to be time. From this resonance, signatures from extra-dimensions could pass through our four dimensional space-time to be measured. From this analysis, the “shape” of the extra dimensions may then be understood. This is not purely out of curiosity, according to string theory the shape of extra dimensions influences everything in our universe:

The shape of the dimensions is crucial because, in string theory, the way the string vibrates determines the pattern of particle masses and the forces that we feel.” – UW-Madison physics professor, Gary Shiu.

The team predict particles carrying extra-dimensional signatures could be generated by the Large Hadron Collider at CERN (nr. Geneva, Switzerland). At very high energies, Kaluza-Klein (KK) gravitons may be created for a brief moment, carrying the signatures with them. Unfortunately KK gravitons will decay very quickly, but from this decay a shower of lower energy, detectable particles will be created. By analyzing the resulting shower, a fingerprint of the KK particle’s signature may be constructed. Any slight changes in the geometry of the detected particles may indicate a particular dimension, and many signatures may be mixed, so complex computer simulations are required to understand the results coming from the LHC.

Source: Science Daily

Venus Express Detects Water Vapour in Low Altitude Clouds

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There’s a real advantage to having a spacecraft orbit a planet for days, months and even years. You have lots and lots of time to really pull in the science. And now, almost 2 years into its visit at our evil twin planet, ESA’s Venus Express has been able to map the planet’s atmosphere at lower altitudes, searching for chemicals that will help scientists understand the planet’s global climate and weather systems.

The planet’s clouds block the visible light from escaping the surface, but other wavelengths, such as infrared, do escape. Since temperatures can reach 200 degrees C at an altitude of 35 km, and more than 450 C at the surface, infrared – or heat – pours out, going right through the clouds. This radiation can then be analyzed to see the chemicals present.

ESA’s Venus Express spacecraft is equipped with a special instrument called the VIRTIS spectrometer, which can measure the atmosphere at various altitudes. It’s already mapped the high altitude clouds, and now VIRTIS has spent the last few orbits mapping the lower atmosphere.

Of course, like the rest of Venus’ atmosphere, the lower altitude clouds are dominated by carbon dioxide – the greenhouse gas that traps the heat in, raising temperatures. VIRTIS also detected carbon monoxide, a chemical that scientists weren’t expecting to see at such low altitudes.

Since carbon monoxide is so rare, scientists can use this as a way to trace global winds that cycle across the planet – sort of like dropping ink into water to study turbulence. VIRTIS was able to determine the large-scale circulation of winds as they rise at the equator and then move north and south towards the poles. Once at the poles, the winds lose altitude again, and circulate back to the beginning.

Venus Express has also detected and mapped the amount of water vapour in the lower atmosphere with high resolution. Since this molecule is so difficult to detect, this has ended a scientific debate about how much there is on Venus.

Original Source: ESA News Release

Observatory Installed on the Coldest, Driest Place on Earth

If you can’t afford to send a telescope to space, you’ll want the next best thing; a location on Earth which is cold, dry and at a high altitude. Perhaps the best place on Earth is “Dome A”, a high altitude region in Antarctica – the coldest and driest place on Earth. A team of astronomers recently climbed the summit of Dome A, and installed a new robotic observatory that should see some amazingly clear skies.

The team of scientists that made the journey represents 6 international institutions, including Texas A&M University and the Polar Research Institute of China. They arrived at Dome A on January 11th, in the middle of the southern Summer, and completed the facility installation on Saturday.

The installation is called the PLATeau Observatory, or PLATO, and was built by the University of New South Wales in Australia. PLATO is equipped with a suite of instruments that will let it measure the quality of the conditions, to confirm that it really has the best seeing on Earth. But if the calculations are correct, a 2 metre telescope here would be the equivalent of an 8-metre telescope built somewhere else. And an 8-metre telescope would rival the 30-metre supertelescopes in the works at various locations around the world.

One of the most important instruments is a set of four telescopes built at Purple Mountain Observatory in Nanjing. These are 4 telescopes with 14.5-centimetre apertures. Each one is equipped with a different filter to view the night sky at a different color or wavelength.

The facility is powered by six diesel engines that use aviation fuel in the Winter, and then it switches over to solar energy in the Summer. It will be completely autonomous, operated remotely over the low-bandwidth Iridium satellite service. Workers will then pick up the bulk of its research at the annual servicing visits.

Even in the dead of Winter, where temperatures plunge to -82 degrees Celsius, the facility will be working away gathering images. That’s because the weather around Dome A is very calm and stable. You don’t get the ferocious storms here that you see in other parts of Antarctica. It’s just cold and calm.

With PLATO installed, the team turned around and left the region on a convey of snow tractors. They’ll travel non-stop for 18 days to the coast of Antarctica, and then back to civilization.

Original Source: Texas A&M University News Release

Atlantis Will Fly, Despite Bent Hose

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On Wednesday I reported that NASA was looking into a bent coolant hose on the space shuttle Atlantis. They weren’t sure if this might cause a potential launch delay while it was repaired. Shuttle managers met over the weekend, and decided that it wasn’t enough of a problem to delay the launch.

The problem is with one of the shuttle’s four braided hoses that carry the coolant needed to dissipate heat generated while in space. During a routine inspection, workers noticed that this hose had a bit of a kink in it.

The worry is that the hose could be bent further, or even snapped when the shuttle’s payload bays are closed up Sunday night to prepare for next week’s launch. In order to prevent a problem, a worker will use a long pole with a hook to guide the hose into its retraction box with the bays are closed up. Assuming that goes as planned, the shuttle’s launch won’t be delayed.

And even if the hose does break while the shuttle’s in orbit, it’s not a huge problem, according to NASA. There are a total of 4 of these hoses on Atlantis, and it can get by with the remaining ones.

With that worry out of the way, Atlantis is still scheduled for its Thursday launch from Florida’s Cape Canaveral. The shuttle is carrying Europe’s main contribution to the International Space Station: the Columbus science lab. During their time in space, the astronauts will perform three spacewalks to install the laboratory and perform some experiments.

The astronaut crew arrived in Florida today, and the countdown is expected to begin later Monday afternoon. The weather might be a problem, however. Meteorologists are predicting that there’s only a 40% chance of suitable weather on launch day. Friday should be better, though. Even if rain and clouds hold back the launch, there’s an 80% chance the shuttle will be able to lift off at the end of the week.

NASA has already canceled two launch attempts back in December because of problems with the shuttle’s fuel tank sensors. With an already crowded launch schedule, this additional delay pushes back the rest of the shuttle launches.

Original Source: NASA Status Report

Podcast: Antimatter

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Sometimes, we don’t get to decide what our show’s about. So many threads come together at the same time driving the decision for us. This is one of those situations. We’ve gotten so many questions from listeners in just the last week about antimatter that our show had just been chosen for it. You command, we obey. Let’s talk about antimatter.

Click here to download the episode

Antimatter – Show notes and transcript

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