Image of the Day…First View of Earth From Moon …

August 23, 1966. This photo reveals the first view of Earth from the moon, taken by Lunar Orbiter 1 on August 23, 1966. It’s shot from a distance of about 236,000 miles (380,000 kilometers) and shows half of Earth, from Istanbul to Cape Town and areas east, shrouded in night.

Photograph courtesy NASA/Lunar Orbiter 1 This photo reveals the first view of Earth from the moon, taken by Lunar Orbiter 1 on August 23, 1966. Shot from a distance of about 236,000 miles (380,000 kilometers), this image shows half of Earth, from Istanbul to Cape Town and areas east, shrouded in night.

First view of Earth from the moon, courtesy NASA/Lunar Orbiter 1.

Lunar Orbiter 1 was one of five Lunar Orbiters sent to the moon in the 1960s by NASA. This particular craft was primarily designed to take photographs, in order to serve as an Apollo landing site survey mission. Read more about NASA’s Lunar Orbiter missions, 1966-1967

Though the photo revealed no detail on Earth’s surface when it was taken in 1966, those on Earth who saw this photo must have been stunned by it.

In 2008, NASA released a newly restored version of the original 1966 image of Earth. Using refurbished machinery and modern digital technology, NASA produced the image at a much higher resolution than was possible when it was originally taken. You’ll see the restored image below. Read more about the restoration here.

First image of Earth from moon, taken via Lunar Orbiter I on August 23, 1966, restored in 2008 by NASA, using photographic techniques that were not available when the photo was originally acquired.  Read more about this photo from NASA.

First image of Earth from moon, taken via Lunar Orbiter 1 on August 23, 1966, restored in 2008 by NASA, using photographic techniques that were not available when that early spacecraft originally acquired this historic photo.Read more about this photo from NASA.

Source:::::Earth sky news

Natarajan

 

World”s Largest PAX Jet…. How it is Built …

 

It is the world’s largest passenger aircraft but it can be built from cockpit to wingtip in less than three months.

A  workforce of 800 people can assemble, install, test, paint, furnish and deliver an Emirates A380 in 65 to 80 days.

First the aircraft fuselage is produced in the Airbus Hamburg facility in Germany and then transported to the base in Toulouse for the first stage of final assembly.

The wing sections, produced in the UK are also shipped from Hamburg to Toulouse.

On the Emirates A380, passengers enjoy first-class finishing touches like showers.

On the Emirates A380, passengers enjoy first-class finishing touches like showers. Source: Supplied

Parts like the fuselage and wings are transferred through a transportation network that includes three specially-commissioned ships to carry the sections from production sites throughout Europe.

More than 10,000 bolts are used to connect the fuselage and more than 4000 for the wings.

The first part of the final assembly, produces an aircraft that is ready for its first ferry flight — minus the interior and paint.

Once assembly is complete and each of the five sections are tested by engineers, the aircraft returns to Hamburg for painting and cabin furnishing.

With a surface area the size of seven basketball courts, the A380’s paint job alone takes

With a surface area the size of seven basketball courts, the A380’s paint job alone takes about 10 days. Source:Supplied

It takes 30 people about 10 days to paint the A380 which has a surface area equivalent to seven basketball courts.

More than 500kg of paint is needed to give the aircraft its white colour.

The final stage of furnishing takes about 33 working days to complete.

This includes all seats, galleys, crew rest areas, the Emirates’ unique shower-spa and private suites in First Class, the on board lounge located at the back of Business Class and the in-flight entertainment system.

Emirates took delivery of 13 of the giant double-decker aircraft in the last year taking its fleet of A380s to 50.

The on-board lounge on an Emirates A380 flight. Picture: SDP Media

The on-board lounge on an Emirates A380 flight. Picture: SDP Media Source: Supplied

The airline has two A380 configurations which seat either 489 or 517 people, including 14 in First Class, 76 in Business and 399 or 427 in Economy.

Another 90 A380s are on order.

As well as the passengers and 30 crew, the aircraft generally carries 478 bottles of wine and 31 bottles of champagne.

About 515 main courses are served on a typical flight, 450 desserts and 650 bread rolls.

The A380 carries 2267 litres of water to facilitate the four-minute showers available to First Class passengers.

First-class dining on board the Emirates A380. Picture: Emirates

First-class dining on board the Emirates A380. Picture: Emirates Source: Supplied 

Source:::::news.com.au

Natarajan

Image of the Day…Curiosity Rover in Mars…

 

Curiosity rover is having wheel problems

Mission planners didn’t anticipate that Curiosity would be driving over an area on Mars that has sharp, pyramid-shaped rocks embedded in hard ground.

View larger. | Curiosity rover's left front wheel at Sol 713 - that is, 713 Martian days since the rover touched down on Mars in 2012.

Emily Lakdawala at the Planetary Society posted an in-depth report today (August 19, 2014) about the ongoing wheel problems of NASA’s Mars Curiosity rover, which has been exploring the surface of the Red Planet since its dramatic touchdown just two years ago this month. Lakdawala writes of:

… punctures, fissures, and ghastly tears. The holes in Curiosity’s wheels have become a major concern to the mission, affecting every day of mission operations and the choice of path to Mount Sharp. Yet mission managers say that, so far, the condition of the wheels has no effect on the rover’s ability to traverse Martian terrain.

The mission did expect some damage to the wheels – some dings and scratches over time – but mission managers did not realize the extent of the damage being done until a large puncture appeared on sol 411 (or 411 Martian days after touchdown). By sol 463, a large rip had opened. Testing back on Earth has revealed the cause of the damage, which appears twofold.

First, the wheels (which are made of a very thin metal) are subject to fatigue, the same mechanism that will cause a paperclip to break in two if you bend it over and over. On Mars, as Curiosity’s wheels drive over a very hard rock surface – one with no sand – as the rover makes its way to Mount Sharp, the central peak of the Gale crater on Mars, the thin skin of the wheels repeatedly bends and ultimately tears.

View larger. | A routine wheel survey on sol 631 found the right rear wheel perched atop a spike-shaped rock firmly embedded in the ground.

Second, mission managers did not anticipate the exact nature of the rocks in and around Curiosity’s landing site and route to (the ironically named?) Mount Sharp. This area has many pyramid-shaped rock – pointy on top – that are firmly embedded in the ground. Lakawalla writes:

It turns out that there are mechanical aspects of the mobility system that actively shove the wheels into pointy rocks. A wheel can resist the force of one-sixth of the rover’s weight pressing down on a pointy rock, but it can’t resist the rover’s weight plus the force imparted by five other wheels shoving the sixth wheel into a pointy rock. The forces are worse for the middle and front wheels than they are for the rear wheels …

Again, though, these forces were understood before Curiosity launched to Mars, and are not, on their own, enough to cause the large punctures. If the pointy rock can move, all that pushing force behind it will just shift the pointy rock to one side or another, or it can roll beneath the wheel, and the wheel will get over it without damage. The key to wheel punctures is immobile pointy rocks. If the pointy rock is stuck in place, partially buried, or if it is a pointy bit of intact bedrock, then there’s nowhere for it to go. At the landing anniversary event, rover driver Matt Heverly showed a video of a test where they had a sharpened metal spike embedded in the ground, and drove a wheel over it. The spike pierced the wheel like a can opener slices into a can. The entire audience sucked in its teeth.

No place we’ve ever been on Mars before has these kinds of embedded, pointy rocks.

Lakdawala emphasizes that Curiosity’s wheel problems will not end the mission, but they will slow the mission down, as mission managers look for the smoothest terrain possible for the rover. She says:

The biggest effect of the wheel damage problem is to slow the mission down. And that’s what will limit how much Curiosity accomplishes. By not traveling as fast, and by having to limit their path choices, the amount of exploration that they can do is necessarily less than if they could go gallivanting across the bedrock outcrops at will.

Curiosity’s wheel problems are also being taken very seriously by planners for the next rover, on the Mars 2020 mission.

Read Emily Lakdawalla’s complete coverage of Curiosity’s wheel problems

Bottom line: Mission managers didn’t anticipate that Curiosity would be driving over an area on Mars that has pyramid-shaped rocks embedded into hard ground, as it traverses Mars.

Source::::Earth sky news site

Natarajan

Image of the Day…Double Rainbow !!!

Intense rainbow over Northern Ireland

Glenn Miles sat in his truck and waited out a rainstorm, then captured the most intense rainbow he’d ever seen.

Glenn Miles Photography kindly contributed this beautiful photo.  See more photos by Glenn Miles

Glenn Miles captured this double rainbow over the north coast of N.Ireland. He wrote:

I have just read your article on seeing red rainbows and thought I would share my images of a rainbow I captured on August 8, 2014 over the north coast of N.Ireland. I sat in my Land rover for around 20 mins waiting for the heavy rain to stop before venturing out onto the beach. I knew from my many years of experience of photographing the landscape that a rainbow was sure to grace the black skies after the rain had stopped. I was not disappointed as after only a few minutes of walking barefoot on the beach, the most intense rainbow that I had ever seen arced high over the sky.

After a few minutes, a double rainbow appeared as did the rain. I walked along the beach for over an hour capturing this amazing rainbow in between wiping the rain off the camera lens. The images were captured about an hour before sunset; hence, the wonderful deep colors.

Here’s another one from this beautiful series, where you can see the rainbow as double:

Glenn Miles Photography kindly contributed this beautiful photo.  See more photos by Glenn Miles

August 8, 2014 rainbow over Northern Ireland coastline, by Glenn Miles Photography. See more photos by Glenn Miles

Source::::Earth sky news

Natarajan

Image of the Day… Great Venus and Jupiter Conjunction…

Venus and Jupiter are the brightest planets! Look east before dawn … closest planet-planet conjunction of 2014 August 18. Dazzling near moon August 22 and 23.

Venus and Jupiter as captured by EarthSky Facebook friend Stefano De Rosa on Isola d'Elba in Italy.

View larger. | Venus and Jupiter as captured by EarthSky Facebook friend Stefano De Rosa on Isola d’Elba in Italy.

The sky’s two brightest planets – Venus and Jupiter – staged 2014′s closest planet-planet conjunction before dawn on August 18. Central Europe had the best view of these two bright worlds less than a moon diameter apart, but they have beautiful from around the world for many days … and will stay beautiful for many days more. Don’t miss the planets onAugust 22 and August 23, when the waning crescent moon will be nearby.

Abhinav Singhai in Haryana, India caught the planets at their closest on August 18.  Thank you, Abhinav.

Abhinav Singhai in Haryana, India caught the planets at their closest on August 18.

Source::::Earth sky news

Natarajan

NASA and The BallPoint Pen ….

NASA and the Pen

ballpoint-penThe humble ballpoint pen is an item so ubiquitous the chances of you not having one near you right now are so low E.T could probably give you the percentage on his right hand. Few people realize just how much technology, craftsmanship and effort goes into creating a single pen- probably because you can buy 30 of them for a few dollars, only to mysteriously have them all disappear within a week.

As the name would suggest, ballpoint pens work by utilizing tiny metal ball bearings. In the case of the most famous ballpoint pens of all, Bic, the ball is commonly made from tungsten carbide, which is notably the same material often used to make armour piercing bullets. After the material has been shaped, it’s then highly polished in a machine that uses a paste made from diamonds. Yes, we’re still talking about those pens banks give away for free and you’ve lost three of already today.

The polished ball is then loaded into a  socket. Due to the fact that the space available between these two parts is supposed to be virtually, but not quite, nil, they need to be accurate to within a thousandth of a centimetre on the ball. If any flaws whatsoever are discovered in the ball bearings during production, it’s not uncommon for thousands of others of these balls that were created alongside the flawed one to be destroyed as well. In fact, to see any imperfections on a ballpoint pen’s ball bearing that makes it to market, you need an electron microscope.

So how does the ink even get out? Well, it works mostly via gravity. Gravity pulls the ink down onto the ball which transfers ink as it is dragged along or pressed against paper or a comparable surface. However, the ball bearing also creates a pressurised seal that prevents excess ink from escaping. The mechanism allows for a continuous flow of ink to be used, without risking the ink inside being exposed to air, and in turn drying out. This allows ballpoint pens to write around 100,000 words each. The long and short of it is, without gravity (or some sort of internal pressure source as in “space pens”), the ink won’t flow properly.

So this brings us to these space pens. As the story goes, when the space race was heating up, NASA invested millions (sometimes stated as billions) into developing a pen that would work in orbit. However, when the Russians went into space they just took pencils. It’s a famous story that is mostly false.

Although Soviet cosmonauts did use pencils in space for a time, so did the Americans.  However, it quickly became clear that pencils were  a very bad idea since they had a habit of breaking and sending tiny eye-seeking fragments of pencil lead and wood bits into the air. There were also some concerns over these fragments potentially damaging equipment, even perhaps causing a fire.

So there was a need for pens that could work in space. But, in fact, neither NASA nor the Russian’s invested any money into such a space device. Where NASA did waste money was, funny enough, on specially designed pencils, which further spurred the need to find a good alternative.  In 1965, they paid a whopping $4,382.50 ($31,949 today) for just 34 pencils made by Tycam Engineering Manufacturing Inc.  Needless to say, the public was not happy with the way their tax dollars were being spent in this instance. (And, in truth, contrary to what many seem to think today, investing tax dollars into the space race at all had tenuous public support at best in the U.S.)

At this point, you might be wondering, “If neither the Soviets nor NASA invested any money into the creation of a pen that could work in space, who did?”  Like Tang and Velcro (often incorrectly credited with having been invented by NASA, see: The Invention of Tang and The Accidental Invention of Velcro), the “space pen” was invented in the private sector and was simply popularized by NASA.

Specifically, the development of the space pen was undertaken solely by Paul C. Fisher and co. of the Fisher Pen Company. After investing over a million dollars of his own money in creating a pen that utilised pressurised nitrogen (35 psi) to force out a specialized unique gel-like ink Fisher formulated, by 1965 he was in possession of a patent and a pen that could work upside down,  underwater, at temperatures from -50 to 400 degrees Fahrenheit (-45 C to 204 C), and even, you guessed it, in space.

When Fisher brought his “AG-7″ pen to the attention of NASA, they tested it thoroughly and then thanked Fisher by buying four hundred pens from him. But he didn’t get the Tycam Engineering rate of $128.90 per writing device.  Rather, they asked for a bulk discount and Fisher ended up selling them the pens for just under $2.39 a piece ($17.42 today), approximately 40% off the normal consumer price at the time of $3.98. Then again, having NASA (and by 1969 the Soviet Union) use his product in space was great advertising; so he did OK and versions of the Fisher space pen are still available today (and write awesome, I might add).

This price of $2.39 for a pressurised space pen is not only notable for being 40% off the consumer price, but also notable because a mere two decades before, a standard ballpoint pen would cost you at its cheapest 5-10 times that, well over $100 when adjusting for inflation. This all changed thanks to one Marcel Bich in the mid-1950s.

But before we get to Bich, we must discuss a newspaper editor named László Bíró. While in Hungary in 1931, Bíró observed that the ink used in a printing press dried almost instantly.  He, like so many others, was also frustrated by the fact that fountain pen ink often smudged, among other annoyances. Thus, he attempted to create a pen that worked with this type of newspaper quick drying ink.  His early efforts using fountain pens with this ink failed, which led him to attempt a ballpoint style pen. But the ink still wasn’t quite working. Fast-forward to 1938- after working with his chemist brother, György, the two developed an ink that would dry near instantly, but still flow well. Bíró also perfected a semi-new system that would deliver that ink effectively. So it was that on June 15, 1938, Bíró patented the first commercially viable ballpoint pen.

As with most inventions, the system he came up with, the one involving a small precisely made ball and socket, wasn’t entirely unique. For instance, a near identical invention had been developed and patented some 50 years earlier in 1888 by John J. Loud. However, Loud developed the device as a means of marking and writing on leather (something fountain pens couldn’t do well). A lack of interest in his invention, as well as poor performance of the device due to flaws in the design, prevented it from becoming commercially successful and he never renewed his patent.  Many others came along in between Loud and Bíró with similar devices that were similarly failures for various reasons such as uneven ink-flow, clogging, and leakage.

In the end, Bíró’s pens were the first commercially viable ballpoint writing devices. Because of this, not only is he generally given credit for inventing the ballpoint pen, but the name by which many ballpoint pens are still known by in many parts of the world today is “biro”.

Of course, Bíró’s pens were ludicrously expensive compared to the ballpoint pens we can buy today. Despite this, they were considered hugely superior to other types of pens, mainly due to the fact that they required no external ink and that they worked in a variety of conditions. The British air force, in particular, were fond of biros produced by the Miles Martin Pen Company due to the fact they worked at varying pressures and altitudes. (Fountain pens were giving the British air force fits at high altitude.)

This all brings us back to Bich and how ballpoint pens finally became not only extremely popular, but ridiculously cheap given the precision required in their making.  Bich saved his money until he could afford to buy a rundown factory in France- a factory that would soon become the centre of his massive pen empire.  After acquiring the factory, Bich bought the rights to Bíró’s ballpoint pen patent and perfected the means of mass-production while maintaining quality.  He then started creating as many pens as he possibly could.

As he mass produced millions upon millions of them, Bich was able to undercut his biggest rivals and sell pens that were as much as one three hundredth of the then normal price. In addition, due to his exacting mass production methods, along with being hundreds of times cheaper, his pens were also better quality in terms of their utility- “Writes the first time, every time,” as the 1960s company advertising slogan went. Needless to say, sales, and the popularity of the ballpoint., skyrocketed and by the time Bich entered the American market, he was able to sell pens for mere pennies, instead of dollars. And the rest, as they say, is history.

Source::::Today i foundout.com

Natarajan

Image of the Day…View From ISS…

Awesomeness from the International Space Station

What would it be like to view the Earth and the sky from the vantage point of the International Space Station? These three photos from ISS tell the tale.

First, the Plough or Big Dipper as seen from the International Space Station. A much clear view as from space, because there's no atmospheric blurring.

First, the Plough or Big Dipper as seen from the International Space Station. You’d get a much clearer view from space, because there’s no atmospheric blurring.

Second, the southern half of Orion the Hunter with the three belt blue supergiant stars Alnitak, Alnilam and Mintaka visible in the Earth's atmosphere. The blue supergiants Saiph and Rigel.  Below the constellation of Lepus the Hare. To the lower left, the constellation of Canis Major, the Great Dog, with the bight stars, Sirius (the brightest object and one of the closest outside of our solar system), powerful blue giant Mirzam, blue supergiant, Adhara (one of the most powerful stars visible from Earth), the huge immensely powerful yellow supergiant Wezen (another one of the most powerful stars visible from Earth) and the blue supergiant Aludra.

Second, you could see stars ascending above the wide curve of the whole Earth. In this case, refraction due to Earth’s thin shell of atmosphere would often be an added bonus. Here is the southern half of Orion the Hunter with the three belt blue supergiant stars Alnitak, Alnilam and Mintaka visible in the Earth’s atmosphere. The blue supergiants Saiph and Rigel. Below the constellation of Lepus the Hare. To the lower left, the constellation of Canis Major, the Great Dog, with the bight stars, Sirius (the brightest object and one of the closest outside of our solar system), powerful blue giant Mirzam, blue supergiant, Adhara (one of the most powerful stars visible from Earth), the huge immensely powerful yellow supergiant Wezen (another one of the most powerful stars visible from Earth) and the blue supergiant Aludra

Finally, for all of you drowned out by the moon at the 2014 Perseid meteoer shower, an August 13, 20111 view of a Persied meteor below the ISS. The ISS was approximately five times higher above sea level than the Perseid. The dying orange giant star Arcturus is visible through the atmosphere on the Earth's limb (edge), and the rest of the constellation of Bootes the Herdsman, along with Corona Borealis the Northern Crown and Serpens Caput the Serpent's Head, are also visible to the left.

Third, you could see meteors from above. For all of you drowned out by the moon at the 2014 Perseid meteor shower, here is an August 17, 2011 view of a Perseid below the ISS. The ISS was approximately five times higher above sea level than the meteor. The dying orange giant star Arcturus is visible through the atmosphere on the Earth’s limb (edge), and the rest of the constellation of Bootes the Herdsman, along with Corona Borealis the Northern Crown and Serpens Caput the Serpent’s Head, are also visible to the left.

Bottom line: What would it be like to view the Earth and the sky from the vantage point of the International Space Station? These three photos from ISS tell the tale.

Source::::Earth skynews

Natarajan

Image of the Day…Pemaquid Point Lighthouse…

Pemaquid Point lighthouse and Milky Way

The historic Maine lighthouse against the gorgeous backdrop of the Milky Way, by Manish Mamtani Photography.

Photo credit: Manish Mamtani

John Quincy Adams commissioned the Pemaquid Point lighthouse in Bristol, Maine in 1827. The lighthouse was built that same year. Due to poor workmanship (salt water in the mortar mix), the lighthouse began to crumble and was replaced in 1835. Today, it’s a popular spot for photographers and sightseers.

Source::::::Earth sky news

Natarajan

See more photos by Manish Mamtani Photography.

Joke of the Day…” Can we send Ours …” ?

For his entire working life, a dedicated and hardworking Astrophysicist tried in all earnest to find the existence of other being somewhere in the universe. After 58 years of constant effort, he finally receives a response from a planet 30 billion light years away.

“What is your planet like?” groaned the extraterrestrial from the other side of the Galaxy.

“It is 12,756 Kilometers in diameter, is 93,000,000 miles from the nearest star, our sun, has an average temperature of 72 degrees F. We breathe oxygen, live about 75 years, and have both men and women” answered the Physicist.

“Do the you get along with the women on your planet?” the extraterrestrial asked slowly.

Puzzled by the question, but not wanting to insult the female Physicists near by, he answered “Why yes. We get along quite well here.”

The extraterrestrial perked up “Can we send you ours?”

Source::::joke a day.com

Natarajan