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Taking into account human spacecraft going up and cloaked alien ships coming down, is the Earth gaining or losing mass? The BBC asked Cambridge University scientists to account for all of the material leaving and arriving on Earth:
But overall, Dr Smith has calculated that the Earth – including the sea and the atmosphere – is losing mass. He points to a handful of reasons.
For instance, the Earth’s core is like a giant nuclear reactor that is gradually losing energy over time, and that loss in energy translates into a loss of mass.
But this is a tiny amount – he estimates no more than 16 tonnes a year.
And what about launching rockets and satellites into space, like Phobos-Grunt? Dr Smith discounts this as most of it will fall back down to Earth again.
But there is something else that is making the planet lose mass. Gases such as hydrogen are so light, they are escaping from the atmosphere.
Smith concluded that the Earth loses 50,000 metric tonnes each year.
Link -via @BrainPicker | Photo: NASA
NASA has released a high-definition image of the Earth it calls Blue Marble 2012.
A ‘Blue Marble’ image of the Earth taken from the VIIRS instrument aboard NASA’s most recently launched Earth-observing satellite – Suomi NPP. This composite image uses a number of swaths of the Earth’s surface taken on January 4, 2012. The NPP satellite was renamed ‘Suomi NPP’ on January 24, 2012 to honor the late Verner E. Suomi of the University of Wisconsin.
The original Blue Marble image was taken in 1972 by astronauts aboard Apollo 17. Until today, it was my desktop image. NASA has made the new image available for download in several sizes. Link to story. Link to image. -via Buzzfeed
(Image Credit: NASA/NOAA/GSFC/Suomi NPP/VIIRS/Norman Kuring)
Our world is filled with extreme climates, peaks and more. If you’ve ever been interested in these record-breaking locations, then don’t miss these ten most extreme places on earth including the largest vertical drop as you can see above.
Randall Munroe of xkcd presents a dozen different ways to project the earth onto a map, and analyzes the fans of each. My favorite (after the globe, of course) is the Robinson projection, which pegs my lifestyle pretty well. Link -via the Presurfer
The highest mountain on earth is Mt. Everest in Nepal at 29,029 feet above sea level. However, it not the point on earth that is farthest from the center of the planet. That honor belongs to the volcano called Chimborazo in Ecuador.
The summit of the Chimborazo is the fixed point on Earth which has the utmost distance from the center – because of the modified ball shape of the planet Earth which is “thicker” around the Equator than measured around the poles.[note 3] Chimborazo is one degree south of the Equator and the Earth’s diameter at the Equator is greater than at the latitude of Everest (8,848 m (29,029 ft) above sea level), nearly 28° north, with sea level also elevated. Despite being 2,580 m (8,465 ft) lower in elevation above sea level, it is 6,384.4 km (3,967.1 mi) from the Earth’s centre, 2,168 m (7,113 ft) or 2.168 km (1.347 mi) farther than the summit of Everest (6,382.3 km (3,965.8 mi) from the Earth’s center).[note 4] However, by the criterion of elevation above sea level, Chimborazo is not even the highest peak of the Andes.
Imagine that! Link -via reddit
This is a time-lapse video showing what it’d be like to fly over Earth, starting at the Pacific Ocean in the Northern Hemisphere and moving towards Antarctica. Add some epic John Williams! Yes, I did just spend a minute or two living vicariously as Super(wo)man.
Video link -via Discover
This whole-earth image was taken Friday morning by the NASA/NOAA GOES-13 satellite. It shows Hurricane Irene to be about 510 miles wide. NASA has more information and images at the website. Link -via Boing Boing
(Image credit: Flickr user NASA Goddard Photo and Video)
Do you dream of snuggling up at night with a heavenly body? Well, now you can with the Celestial Buddies from the NeatoShop. These fantastic plush toys are designed to look like the sun, earth, moon, and mars.
Be sure to check out the NeatoShop for more loveable Plush Toys.
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Our earth is a dynamic place that moves and changes with no regard to humans or anyone else. Every once in a while, those changes occur rapidly and powerfully. Cracked looks at five events that left behind some serious scars, like the 1883 explosion of Krakatoa.
The blast was the equivalent of 200 megatons of TNT. For perspective, the largest explosion ever made by humans was the detonation of a Russian hydrogen bomb, which was 50 megatons. That blast broke windows in buildings 560 miles away. Krakatoa was four times that; the cloud it generated wiped entire villages off the map 25 miles away and created a tsunami that traveled all the way to South Africa. That wasn’t all Krakatoa’s neighbors got for their birthday that year; giant pieces of rock and coral reef fell from the sky as well.
Now get this: Krakatoa is only number five on the list. Link
Comments Off Earth may be round, but not its gravitational field! After two years in orbit, the European Space Agency’s Gravity Field and Steady-State Ocean Circulation Explorer satellite has revealed the clearest picture of earth’s gravity-field map:
The geoid is the surface of an ideal global ocean in the absence of tides and currents, shaped only by gravity. It is a crucial reference for measuring ocean circulation, sea-level change and ice dynamics – all affected by climate change.
Hit play or go to Link [YouTube]
I knew this, but only because I recall the approximate the number of miles to the moon, and the circumference of the earth. Those near my age might also remember that a fast rocket ship takes three days to get to the moon. -via reddit
Isn’t this an adorable house? You almost expect to see Frodo coming out of it! Owen Geiger built this earthen dome in Thailand in 2007. The main component is bags of soil. You can build your own with his tutorial at Instructables. Link -via The Daily What
When we travel, we often want to stay in the best hotels money can buy, but really, what is the fun in that? The Hotel De Vrouwe van Stavoren Friesland in the Netherlands is built from huge 4,500 liter wine casks! It is just one of eight weird hotels in which you can book a room, but call ahead because some of these are very popular.
From the Upcoming 
ueue, submitted by 
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In the asteroid belt lies a 125 mile wide hunk of rock called 24-Themis that is covered in ice and organic material. Scientists discovered this by analyzing the reflected sunlight and finding that it is consistent with the properties of water and various other organic materials.
Finding ice on the surface of the asteroid was a surprise because it would have been expected to evaporate quickly.
‘This implies that ice is quite abundant in the interior of 24 Themis and perhaps many other asteroids,’ Dr Emery added.
‘This ice on asteroids may be the answer to the puzzle of where Earth’s water came from.’
From the Upcoming ueue, submitted by sshuggi.
The 8.8 magnitude earthquake in Chile apparently had some profound effects on this giant spinning rock we live on. NASA calculated that the figure axis, along which Earth’s mass is balanced, shifted by about eight centimeters.
Perhaps more impressive is how much the quake shifted Earth’s axis. Gross calculates the quake should have moved Earth’s figure axis (the axis about which Earth’s mass is balanced) by 2.7 milliarcseconds (about 8 centimeters, or 3 inches). Earth’s figure axis is not the same as its north-south axis; they are offset by about 10 meters (about 33 feet).
It also disrupted the Earth’s rotation, shortening each day by 1.26 microseconds. No worries, though, because at that rate we shouldn’t notice any real effects for a while, but in 500 (edit by Alex 3/3/10 – more like 25 million) years or so, sunrise will be around 10:30 PM. Link
From the Upcoming ueue, submitted by 
Dust storm approaching Stratford, Texas (1935) Photo: NOAA George E. Marsh Album
Dust may be an annoying facts of life to you and me, but it is endlessly fascinating to scientists. Indeed, dust actually play a big role in the planet’s ecology:
Dust can have a variety of impacts including fertilizing the ocean with iron, added Natalie Mahowald of Cornell University in Ithaca, N.Y.
"These particles can be carried for thousands of miles in the atmosphere, and during that time can interact with chemistry, clouds and radiation to modify climate," she said in prepared remarks.
Dust can be both good and bad, concluded Muhs, threatening health yet fertilizing land and ocean. It also affects the Earth’s radiation, which is currently undergoing a warming due to human-induced gases being added to the atmosphere.
Over dark surfaces that absorb heat from the sun dust can have a cooling effect by reflecting light, but it can also warm other areas.
Based on the Argentinian Political Advertisement, “The Truth” by RECREAR, “Lost Generation” was made by metroamv as an entry in AARP’s U@50 contest. It won second place.
If you’ve ever wondered what the financial or ecological costs of a bottle of water really are, then check out this great infographic detailing the facts of bottled water. Some of the things are really interesting, like the fact that 40% of all bottled water companies just get their water from tap water.
Photo by Carsten Peter
Perched above the lighted city of Catania, Italy, Mount Etna hurls a fountain of fire skyward as rivers of lava spill down its flanks. In spite of its dazzling displays, Mount Etna is a relatively safe volcano with rare, compact eruptions and slow-flowing lava that gives people a chance to escape. – National Geographic – {More Pics here!}
Lots of people live near a volcano. As for me, I live a relatively safe distance from Mt. St. Helens, but this region was severely affected by the eruption in 1980. I recently returned there, and it while it seems safe now, the devastation still shows. But The Geography Site cites four good reasons why society loves a lava-spewing mountain in their backyard.
Geothermal energy, minerals, fertile soil, and tourism. That last one is interesting, and many tourist attractions involve volcanic activity. And about that geothermal energy?
Countries such as Iceland make extensive use of geothermal power, with approximately two thirds of Iceland’s electricity coming from steam powered turbines. New Zealand and to a lesser extent, Japan, also make effective use of geothermal energy.
It makes sense that we’d be so close to that which can give us something powerful, while risking so much at the same time. Volcanoes rock.
This beautiful picture of Earth was taken by the European Space Agency’s Rosetta spacecraft. Rosetta is on a mission to intercept the comet 67P/Churyumov-Gerasimenko, which will happen in 2014. The brightest part of this picture is our South Pole. Link
(image credit: ESA)
A few months ago, photographer and environmentalist Yann Arthus-Bertrand and his non-profit organization GoodPlanet released the movie HOME, a documentary about life on Earth and the current environmental challenges of our planet (Arthus-Bertrand is famous for his aerial photography, and the movie is quite wonderfully shot - if you haven't seen it before, it's worth a look: HOME is available in full, free on YouTube).
As a companion to the movie, Arthus-Bertrand released a companion book
HOME:
A Hymn to the Planet and Humanity
It was hard to pick just a few segments from the book to excerpt - the whole book is interesting. And yes, undoubtedly there are many oversimplifications that is inherent in presenting complex problems in short vignettes - but Home: A Hymn to the Planet and Humanity is a good starting point for many of us in understanding the environmental problems of today.
Here are 5 short segments from the book, published on Neatorama with permission:
Blocks of flats on Seoul's south bank, South Korea
The world’s population quadrupled over the course of the 20th century and now stands at 6.7 billion. Since 2000 it has increased by 700 million, which is equivalent to the entire population rise in the 19th century. In the 18th century, it rose by a mere 200 million. As their numbers have grown, human beings have gravitated increasingly toward cities, which have also grown as a result. Since 2007, more than one in two of us live in a town or city.
There are more people in some of the bigger cities – such as Tokyo, with its population of 35 million – than in some countries as a whole. In developing countries, urban growth can occur at a rate that is simply mind-boggling. Dhaka, the capital of Bangladesh, had a population of 300,000 in 1950, whereas today the figure stands at more than 15 million: a fiftyfold increase in fifty years. Boom towns such as Dhaka face immense problems in terms of infrastructure including electricity, drinking water, and waste disposal.
Nevertheless, this demographic explosion and the urbanization linked to it seem also to hold part of the solution. Birth rates have been shown to be decreasing over a great many parts of the globe, particularly in urban areas. The current average stands at 2.6, with significant regional disparities. In many Western countries, it has even fallen below 2.1, the threshold for population increase. The world population is shrinking and ageing. Whereas earlier projections for the coming decades envisaged a global population of 12 billion, the estimate has fallen and it is now thought that the population should stabilize at around 9 billion by 2050.
This seems to be due to the fact that city-dwellers generally have better access to education. For many women, in particular, this signifies access to information and to methods of contraception. It also means that these women are often able to work in addition to having a family. Having children becomes a choice, to be balanced against a career, for example. Urban life, moreover, changes people’s behavior and living requirements: couples have fewer children than those living in the country since they no longer need help in the fields. This reduction in the birth rate responds to one of the major challenges of the century: that of population control as a means of successfully feeding the world and saving the planet.
Oil fields near Bakersfield, California, USA
Oil will not run out suddenly. It will be a slow, agonizing decline. As oil becomes scarcer its price will rise, and what used to be very cheap will become expensive. Society will be wholly transformed.
The reason for this is simple: a finite planet has finite resources. Once we have consumed all of our oil and other primary materials, there will be nothing left. Oil is not a renewable resource on any timescale comparable to its rate of consumption. The chemical reactions which led to its formation occurred over millions of years.
There are, undoubtedly, oil deposits that remain to be discovered. But the easiest have already been found and exploited. Each year, we consume more oil than we find. This is clearly going to cause problems.
It is not only a question of when oil will run out, but how society will change as it does. A world in which oil is much rarer – and therefore costlier – will be different from our own. The modern petrochemical industry will have to change dramatically: everything from lipsticks to fertilizers and plastics of all types will either be made differently or not at all. Transport will obviously become more expensive. This will spell the end of the West’s huge retail and supermarket networks, since these rely on road transportation and economies of scale. The price of imported products will rise, and international tourism will return to what it used to be in previous centuries: a luxury for the privileged few. Competition for access to the last remaining oil deposits will increase, and may lead to conflict.
These developments are inevitable, and will only be temporarily delayed by the current recession which is slowing down the global economy. Developing renewable forms of energy and reducing consumption are the two most basic measures we can take to prepare ourselves.
What is the current state of world fisheries?
How important is fish to the average diet?
Moshav (co-operative village) farm at Nahalal, Jezrael plain, Israel
Today a third of humanity is suffering from water scarcity. Specialists use the term “water stress” when the demand for water exceeds the available freshwater supply by 10%. Although 10% of renewable resource may not seem like much, we should not forget that before mankind’s invention, 100% of this water was used by ecosystems. This extra demand is enough to dry a water course, drain a spring, or prevent the replenishment of groundwater.
While the population of Canada and the Amazon or Congo basin have a plentiful water supply, the people of the Mediterranean basin, Central Asia and Mexico are at greater risk of scarcity. The particular problem with water is that it is difficult to transport in large quantities over great distances.
One solution is to use the same water several times. An increasing number of industries are reusing water, retreating it up to 30 times in some cases. Domestic washwater, known as “greywater,” can be reused to water a garden or flush a toilet, reserving drinkable water for human consumption, cooking, or washing. In countries where water is scarce, wastewater from cities is retreated for use in agriculture. In Israel, for example, where the average rainfall is 1 inch (25 mm) a year, 70% of wastewater is recycled, allowing 49,000 acres (20,000 hectares) of land to be watered.
There are many other ways of saving water, especially by being aware of how much of it we consume. Some of this water is invisible: it is used to make a product, but is not present in the product itself. This is called virtual water. One pound of grain means hundreds of gallons of irrigation water; a pair of cotton jeans require 2,860 gallons (10,850 liters) of water; a cup of coffee 9 gallons (35 liters); a sheet of paper 2.5 gallons (10 liters). A single tomato contains 3.5 gallons (13 liters) of virtual water, which is more than many people use in a day. Paradoxically, some countries that face water scarcity are actually exporting some of their limited water resources in the form of agricultural or manufactured products.
Volcano of Rano Kau, Easter Island, Chile
Sooner or later, societies disappear and are replaced by new ones. As our own society enters a critical phase, what lessons can be learned from those that preceded us? One example that has been extensively studied is Easter Island in the Pacific Ocean. The island was once home to a flourishing civilization, which reached its peak in around 1500, but it subsequently experienced a rapid decline, losing four fifths of its population in just one century. According to the American expert Jared Diamond, the explanation lies principally in the fact that the people deforested their entire land. Without trees, they were no longer able to build fishing boats, and crucially the soil was eroded. As the situation worsened, the people began fighting among themselves, and developed bizarre religious practices. In an effort to erect increasingly gigantic statutes, they cut down more and more trees, accelerating their demise.
Diamond also studied a number of other civilizations that vanished largely as a result of environmental factors, such as the Maya and Babylonians, who exhausted their land, and the Greenland Vikings, who could not adapt to the cooler climate. While these societies did not vanish because of environmental damage alone, it certainly weakened their economic and social structures and created vicious cycles that ultimately proved fatal. The same pattern could easily be applied to modern society.
In Diamond’s analysis, the factors leading to a society’s collapse seem to be quite clearly set out every time. But for political, religious, or social reasons, the society is incapable of reacting and taking adequate measures to ensure its survival. What would the Easter Islander who cut down the last tree have been thinking? Another expert in the history of civilizations, the British historian Arnold Toynbee, wrote that “civilizations die from suicide, not by murder” – in other words, from their inability to resolve their internal crises.
Today most people agree that we are facing an environmental catastrophe. We need to change the course in which our society is heading, and remove the obstacles to that change. It is too late to bury our heads in the sand. It is also too late to be pessimistic.
Yann
Arthus-Bertrand published more than 40 books, including the multimillion-copy
international bestseller Earth from Above
Links: HOME official website | Watch the movie at YouTube | The book at Amazon
This apple is in the portfolio of artist Kevin Van Aelst, along with quite a few other neat visual works. The only problem I have is that he forgot Madagascar.
This is the magnificent Cartwheel galaxy, a stellar structure which measures more than 100,000 light years across.
It was released to promote a 24-hour webcast from observatories around the world, marking the International Year of Astronomy.
The kaleidoscopic galaxy lies 500million light years from Earth, and its unusual shape is due to a catastrophic collision with one of the smaller galaxies on the lower left hundreds of millions of years ago.
The smaller galaxy produced compression waves in the gas of the Cartwheel as it plunged through it, which triggered bursts of star formation, lighting up the rim.
From the Upcoming ueue, submitted by sunnyspeaks.
Our fight against global warming is futile. Nature is going to equalize everything in the end.
Here is a cool animation about plate techtonics before and after our time.
From the Upcoming ueue, submitted by Christophe.
Back on December 24, 1968 the crew of the Apollo 8 space mission were to make history for two things. They were the first human beings to circle another celestial body in space and they were also to take one of the most iconic pictures of the Earth rising behind the Moon on Christmas Eve which can be seen here on the post Alex had put up: The First Earthrise. Here you’ll hear them wishing everyone a Merry Christmas and Peace to everyone.
Merry Christmas, Happy Hanukkah, Kwanzaa and any other holidays out there! Have a Happy New Year!
via – Wired
For the first time forty years ago yesterday, humans saw their first Earthrise. BBC has the story:
… on Christmas Eve 1968, none of the astronauts on board Apollo 8 were ready for the opportunity to witness their own Earthrise.
In all the months of training and preparation which had preceded the mission, no-one had thought to schedule an attempt for the crew to glimpse and record the most moving of sights, as their jewel of a home planet, suspended in the blackness of space, rose from behind the barren lunar horizon.
… as Apollo 8 nosed its way back from the far side of the Moon for the fourth time, it was Frank Borman who first spotted the view by chance from a window, his reaction captured by the on board tape recorder.
"Oh, my God! Look at that picture over there!" he exclaimed. "Isn’t that something…"
We all learned it growing up – The Earth’s crust is made up of three distinct layers: Core, mantle, and crust. Unfortunately, as with other simplistic theories like the tongue map, scientists have recently discovered that the real world is a bit more complicated:
One clue to the new thinking is that seismic waves traveling through the planet have long been measured to travel at inexplicably different speeds. Sharp speed changes suggest differing materials. On each side of the planet there are two big, chemically distinct, dense piles or blobs of material that are hundreds of kilometers thick – one beneath the Pacific and the other below the Atlantic and Africa, the researchers say.
“You can picture these piles like peanut butter,” McNamara said. “It is solid rock, but rock under very high pressures and temperatures becomes soft like peanut butter, so any stresses will cause it to flow.”
Hit the Link at LiveScience to find out more, or check out the full article at Science (subscription required)
