Every cosmic spectacle presents some stunning images and yesterday’s Lunar Eclipse was no different. Many people in the Indian sub-continent were left satisfied this time around, after the June eclipse (awesome pics here) was obscured by heavy cloud cover, leaving eclipse enthusiasts disheartened. We bring to you few photos from around the world.
Here is one of the earliest photos, circulated by Reuters, which shows the earliest phases of the eclipse.
Blood Red and Brilliant
Here’s a brilliant one taken by David Prosper. This is just one of the many he took from his backyard in Oakland, California.
Here’s a close-up of the moon, by now just an orange ghostly image. This one was taken by Charles R. Jones, who is a skywatcher. This is from Phoenix, Arizona.
This next one is an absolute beauty. It was taken at the Turret Arch at Arches National Park near Moab, Utah. The photo is taken from Hungeree, which has a few other gems in their kitty too.
The Final Goodbye and Hello Once again!
This one is by Kendra Lakkees, showing the end of the totality phase of the eclipse.
The last one is the end of the eclipse. Taken by yours truly, from Kolkata, India, this closes the article.
Hope you enjoyed. The next lunar eclipse is a long time away.
Montana State University’s Museum of the Rockies and the State Museum of Pennsylvania have made BIG news. The largest dinosaur to ever be discovered in North America has been found in New Mexico according to a publication of Acta Palaeontologica Polonica where MSU researcher, Denver Fowler along with Robert Sullivan, of Harrisburg PA, made the revelation of their massive find. Pictured below, you can see the badlands’ conditions of the Naashoibito beds in San Juan, New Mexico, where the discovery was made.
The bones were of a saurapod called the Alamosaurus. It was a long-necked dinosaur that lived in the Southwestern part of the U.S. about 69 million years ago. The Alamosaurus isn’t new to researchers however, the sheer size of this particular specimen is what sets it apart from the pack.
“We used to think that a fully grown Alamosaurus measured around 60 feet long and weighed about 30 tons; but a 2009 study by another MSU researcher, Dr. Holly Woodward, found that a femur thought to belong to an adult was still growing,” Fowler said. “This told us thatAlamosaurus got even bigger, but we didn’t imagine that it could get quite this big.”
Now that they have compared the fragmentary remains to that of its South American cousin, the Argentinosaurus, it is estimated that this heavy hitter could have been as much as 70 tons! The team collected two vertebrae and a femur. Just to give you an idea of how enormous this find was, it took most of a day for the team to carry the collection 1.2 miles back to camp. In the image below, you can see a reconstructed vertebrae and how large in scale this creature was in comparison to humans.
One thing this discovery reveals is the importance of continued research. It is apparent now that many of the assumptions about the Alamosaurus were based on immature remains. Fowler and his team hope that they can get back to New Mexico in hopes of finding a more complete specimen. Unfortunately, to date there have only been fragmentary discoveries of the Alamosaurus. Fowler said. “Our findings show that Alamosaurus was originally described based on immature material, and this is a problem as characteristics that define a species are typically only fully gained at adult size. This means that we might be misinterpreting the relationships of Alamosaurus and possibly other sauropod dinosaurs too.” Though Fowler’s teams have made significant discoveries, a big challenge they have is to try to make super size discoveries with a small team of two or three people.
Another Lunar Eclipse is upon us and this one can be seen by more than half the world’s population. In fact this will only be missed by people living in South America. The sight will also be missed by a handful of people in Antarctica. It will be clearest for people living in Central and East Asia. Places like New Zealand will also get a great show, but will miss out on the last bit of the eclipse.
The full duration of the eclipse will be visible from most of Russia, with the western part missing out on a bit, Kazakhstan, central Asian countries like Mongolia and China, eastern and south-eastern countries like India, Bangladesh, Nepal, Thailand, Myanmar, Vietnam and the Phillippines. All the countries in this region, not mentioned here, will also get a great show. These countries will experience a 51 to 57 minute long eclipse, including the spectacular blood-red moon total eclipse.
Even countries as far east as Australia will get the full eclipse show. New Zealand will be just about unlucky to miss out on the last part of the eclipse. The moon will have set before the penumbral shadow is fully removed. But, as eclipse enthusiasts know, is not such a big miss anyway.
It is worth mentioning that for the Indian sub-continent and south-east Asian countries, this will be the last lunar eclipse till 2018. Try to catch this one!
Partial eclipse will be visible from most of Europe. Eastern Europe will get a longer show than the western part. The eclipse will start from moonrise and Europe will miss out on the initial penumbral phase. All of Europe will be able to see the eclipse totality. The same can be said about Africa.
The United States and Canada will be lucky enough to get almost the entire eclipse. It will also miss the initial penumbra. Alaska will the unlucky US state to be missing out.
The Important Timings
Here’s the list of the major times:
The penumbral phase (P1) begins from 11:33 GMT (or 05:33 EST or 17:03 IST).
The penumbral eclipse (U1) begins from 12: 45 GMT (06:45 EST or 18:15 IST)
Total eclipse (U2) begins from 14:06 GMT (08:06 EST or 19:36 IST)
Greatest eclipse occurs at 14:31 GMT (08:31 EST or 20:01 IST)
Total eclipse (U3) ends at 14:57 GMT (08:57 EST or 20:27 IST)
Partial eclipse ends (U4) at 16:17 GMT (10:17 EST or 21:47 IST)
Penumbral phase (P2) ends at 17:30 GMT ( 11:00 EST or 23:00 IST)
Here’s a small graphic summarizing the times. It also shows whether you’ll be able to see the eclipse or not, depending on where you are in the world.
The Red Moon
So there it is that’s all you need to know for the upcoming eclipse. We’ve told you everything except for the red moon.
At totality, the moon will appear red or even deep pink. This is because of the scattering of the little amount of light filtering through even during the eclipse by the dust particles in the atmosphere. The blood red moon is a sight to behold! Do not miss it for the world.
This is the strongest evidence of the presence of water yet, on the Red Planet. The Mars Rover, Opportunity, has discovered some sediments of a shiny mineral called gypsum, which most definitely was deposited by liquid water. When that sediment was deposited, is not quite known, but it is definitely millions (or even billions) of years old.
Gypsum is an extremely common mineral on Earth and is frequently processed to make Plaster of Paris.
We had earlier reported about evidence of possible flowing water here.
This discovery was made at the rim of the crater Endeavour, a 14 mile wide crater on Mars. The mineral veinwas found to be about 50 cm (or about 20 inches) long and about 3 cm wide. Opportunity studied this mineral deposit with both optical range camera as well as its X-Ray spectrometer. They concluded beyond doubt that this was gypsum, or moist calcium sulphate. The mineral vein is called “Homesteak” and NASA released an official photo of it in its press release.
There is really no second option, says Steve Squyres of Cornell University, attached to the Opportunity mission as its principal investigator. Why? He clarifies:
This tells a slam-dunk story that water flowed through underground fractures in the rock… There was a fracture in the rock, water flowed through it, gypsum precipitated from the water. End of story. There is no ambiguity about this, and this is what makes it so cool.
Here, both the chemistry, mineralogy, and the morphology just scream water. This is more solid than anything else that we’ve seen in the whole mission.
Why the excitement? Squyres obliges yet again:
This stuff is a fairly pure chemical deposit that formed in place right where we see it. That can’t be said for other gypsum seen on Mars or for other water-related minerals Opportunity has found. It’s not uncommon on Earth, but on Mars, it’s the kind of thing that makes geologists jump out of their chairs.
What is most interesting is the fact that gypsum forms in nearly neutral water, i.e. the water is neither acidic or alkaline. This is more suitable to the presence of Earth-like lifeforms. Earlier discoveries of minerals like Jarosite pointed to the presence of highly acidic water, which wasn’t all that conducive to life as we know it.
Scientists have long been trying to detect the presence of water on Mars. The new Mars Rover Curiosity’ will soon reach Mars (in August, 2012) and begin a more in-depth study. Spirit and Opportunity have been invaluable in this regard. Both are well past their proposed period of operation, and while Spirit has been declared dead earlier this year, Opportunity is still in great shape.
Please note that a direct evidence of water may be hard to find, but this is surely exciting. Even the possibility that Mars once harbored life is a tantalizing prospect!
The most prestigious prizes in the world of Science and Literature are to be given out on 10th of December and the program line-up starts from tomorrow, the 7th. You can check the complete list of winners here, including their Nobel Prize citations. There’s a live webcast link thrown in as well. We’ll give a short program line-up towards the end of this post, but before that we want to tell you how a Nobel Prize Medal is made, just so that you can make your own, if you wanted to!
The procedure to make the medals is documented at the Swedish Mint or Myntverket. They have made all the medals given out since 1901. Here’s a step-by-step rundown.
Step 1: Getting the Gold!
High purity gold is melted and rolled into sheets. The sheets are then flattened to proper thickness, which will become the thickness of the Nobel Prize medal. They are then cut into proper sizes.
The medals of proper sizes are then punched through. What we have now is a circular piece of highly pure gold of precise thickness and radius. Now for the heat treatment!
Step 2: Hot Foot And Cold Shower
The medal is now imprinted with the face of Nobel on one side. On the other side, is engraved the goddess Isis, who represents Nature. She is emerging from the clouds and the veil from her head is being slightly removed by the Genius of Science. The face of the Goddess is cold and austere and she holds a cornucopia in her hand.
This brilliant metaphorical image is underlined by the name of the recipient of the Nobel Prize. Below that is written REG. ACAD. SCIENT. SUEC.standing for The Royal Swedish Academy of Sciences. On the circumference is the inscription Inventas vitam juvat excoluisse per artes, which loosely translates to And they who bettered life on earth by their newly found mastery. This inscription is present on the Nobel Prizes for Physics, Chemistry, Physiology/Medicine and Literature. The design was conceived of by Erik Lindberg.
The Peace Nobel bears instead the inscription Pro pace et fraternitate gentium, which translates to For the peace and brotherhood of men. This design was conceived of by Gustav Vigeland.
The engraving of the name of the recipient is done later. After this heat treatment, the medal is cooled off underwater.
Step 3: Making it shine brighter
The medal is polished so that any dirt or metal oxides might be removed from the surface of the medal. This is a process done by hand and the polishing should be delicate enough to just remove the unwanted surface impurities, not damage the medal itself.
At each step the medal is constantly checked for any abrasions. The weight of the gold in the medal at this point is a precise 175 g and this is checked.
Step 4: Engraved for Eternity
Now, the crucial step of engraving the name of the recipient is undertaken. This is done by hand. At the end of the engraving session, the medal is polished slightly and checked for scratches again. It is then approved.
The grizzled Nobel, staring out from a large coin of gold, now honours another momentous human achievement.
The Nobel Prize Medal is ready!
Line-up for the Ceremony
Now, for the promised line-up of the program leading up to the Nobel Prize ceremony on the 10th of December:
7th December: Nobel Lectures in Physiology/Medicine and Literature. Starts at 1:00 PM CET (7:00 AM EST). The first one is at Karolinska Institutet, Stockholm, while the latter at Swedish Academy.
8th December: Nobel Lectures in Physics, Chemistry and Economic Sciences. Starts at 9:00 AM CET (3:00 AM CET).
9th December: Nothing
10th December: Nobel Peace Prize Ceremony at Oslo City Hall, at 1:00 PM CET (7:00 PM EST). Nobel Prize Ceremony starts at Stockholm Concert Hall, at 4:30 PM CET (10:30 AM EST).
Here’s the live video player (reused from nobelprize.org site)
There are monsters out there that are larger than anything we can imagine or know! This feeling was once again reaffirmed yesterday, when scientists published results that told them of two new supermassive blackholes that turn out to be bigger than any known so far. These two weigh in at an estimated 9.7 Billion Solar masses!
Supermassive blackholes are known to reside in the centers of galaxies. They are presumed to grow in size by gobbling up all matter and gases that come their way. The one at the center of our own Milky Way Galaxy is estimated at a million solar masses! If you think that is big, then be prepared to be blown away.
The largest known black hole was the Messier 87 black hole. This weighed in at a gigantic 6.3 billion solar masses. A new blackhole found in NGC 3842 in the Leo cluster is a gigantic 9.7 billion solar mass monster. This is located 320 million light years away from us. Another one has been found in NGC 4889, in the Coma cluster. This one is 335 million light years away and is similar in mass. The event horizon or the boundary beyond which nothing, not even light, can escape the gravitational force of the blackhole is bigger than the radius of the orbit of Pluto! Compare this to the Milky way blackhole, whose event horizon, by comparison, is a small one at just about one-fifth the size of the orbit of Mercury.
These blackholes are found by looking at the emission of the accretion disks. Matter falling in becomes so hot that it emits light in many wavelengths, including X-Ray and radio. Scientists know objects which are just about the size of a typical spiral galaxy, or even smaller, but emit radiation, which is unusually high. Such structures are called quasars’, shortened from Quasi-Stellar Objects. They are believed to be powered’ by a central blackhole engine!
The research is going to be published in Nature on 8th December.
Molybdenum disulphide, or MoS2, is found much more widely than Silicon. It has high flexibility and also good semi-conducting properties. The greatest advantage of Molybdenite is that it allows for drastic miniaturization. Silicon cannot be made less than 2 nm thick, since, on further thinning, it oxidizes and the surface properties are lost. Molybdenite can be made as thin as 3 atomic layers.
Molybdenite can even rival graphene. The main problem with Graphene is the lack of any natural bandgap. Silicon is extremely convenient in this respect with a 0.7 V bandgap at room temperature. Molybdenite has no such bandgap problems. Though electronic mobility for molybdenite is much less than that of Graphene, for normal circuitry (i.e. not RF circuits) Molybdenite can be easily implemented. The switching speed is much higher than silicon transistors, but less than Graphene. However, the on-off voltage ratio is much higher for molybdenite than for Graphene, making it a better switch, if the switching operations need not be very fast.
All of this coupled with the obvious amplification properties, make Molybdenite a good option for future electronics.
The flexibility of Molybdenite inspires flexible sheets of chips that can be strapped onto a human hand! How’s that for a futuristic vision?
The Universe may not be as dark as previously thought, if an Italian mathematician is to be believed. A. Carati, an Italian mathematician, has made a bold proposition if faraway matteris allowed to interact with galactic matter, it can be shown that their gravitational effects reproduce the galactic rotational curves extremely faithfully! This rules out the need for any non-luminous, or dark, matter.
The Inception of Dark Matter
The problem of dark matter in case of galactic rotation curves is stated as follows. Astronomers have made theoretical predictions (using Einstein’s General Relativity) about the speed of the different parts of the galaxy and their distance from the center. When the velocity is plotted against distance, what we get is called a velocity curve. The problem is that while you expect a certain curve given the amount of luminous matter in a galaxy, what is directly observed is that the velocity curve deviates significantly from this, especially as one goes away from the center. Astrophysicists invoked the presence of dark matter’ or non-luminous matter to save Einstein’s gravitational theory.
This is what a typical curve looks like.
Enter the mathematician
Now, what Carati claims is that if faraway matter is allowed to exert gravitational forces, which, of course, it does, then the rotation curves for spiral galaxies can be explained away. The effect of matter in faraway galaxies is generally neglected in all calculations, since the galaxies are assumed to be uniformly distributed throughout the Universe. (This is the principle of isotropy in space, which is a guiding principle for Cosmology.)
The idea that galaxies might be arranged according to a very complex fractal structure was originated by Sylos Labini in 1998. Carati took up from this point, and making a few simplifying assumptions about the de-correlation of matter at large distances, he showed that the forces that this matter might exert is of the order of 0.2 cH0, H0 being the Hubble’s constant.
The crucial point is that this force is good enough to explain the anomalous rotation curves! And the fit is amazingly accurate.
If seeing is believing, or, at least, suspending disbelief we present the rotation curves for two spiral galaxies NGC 3198 and NGC 2403. Look at the expected curve and how well the observed points fit it!
True, this is an outlandish idea, but so is dark matter. The fact that General Relativity can produce such stunning verification of the experimental data is quite satisfying.
We don’t have any word on how this will solve many of the other puzzles that dark matter solves, mainly the Cosmic Background radiation distribution (WMAP data) and the observed gravitational lensing effects.
The Higgs seems to be playing the game better than ever, peeking out once in a while, but not for long enough time! Initial analysis of the data from both ATLAS and CMS indicate an excess in the gamma-gamma channel for the Higgs at about 125-126 GeV. ATLAS detects this at a high 3.5 sigma confidence level and CMS comes in at a more tentative 2 sigma confidence level. This is good enough to tag it as a proper observation. None is good enough to warrant the tag of a discoveryof the Higgs, which requires 5 sigma confidence levels.
Both ATLAS and CMS observations are in the gamma-gamma or diphoton channel.
We had told you about the Higgs search coming to an end here and also that there is a joint seminar in CERN on the 13th of this month. The announcement at this seminar is expected to be the definitive on the Higgs search. It will make or break the Higgs, and, thus, a part of the Standard Model as well.
125 GeV Higgs more interesting than a 140 GeV one!
In a way, a 125-GeV Higgs would be awesome news for physicists, since this mass would require corrections to the Standard Model, since the vacuum becomes unstable at high energies. A 140 GeV Higgs would’ve been more mundane, and would’ve been the simplest of all the scenarios.
The situation is a bit ironic really. The Tevatron had almost eliminated the Higgs gamma-gamma channel decay process. Many scientists were convinced that the gamma-gamma channel was no good, and if the Higgs is found, it will be via the ZZ or WW channels. Though this is not incorrect, the gamma-gamma channel has given one of the strongest signals of the Higgs till date and right before the big announcement at the seminar.
It is unlikely that CERN will say anything about this before the 13th December announcement. Fingers crossed!
There is palpable tension at CERN for sure people might not sleep till Tuesday, the 13th. The premier particle physics laboratory is all set to hold a special seminar that day, possibly to announce latest in the search for the Higgs boson. The search is nearing an end and this is expected to be a landmark announcement, possibly one that can either confirm or rule out the Higgs boson.
The 13th December joint announcement might be the last one on the Higgs. We are hoping for either a confirmation or nullification.
We had covered a seminar given jointly by the ATLAS and CMS collaborations last month here and we had told you that the search was nearing an end.
The latest news yet!
The mass ranges for finding the Higgs has been narrowed down to just 30 GeV between 114 to 144 GeV, as per the simplest version of the Standard Model. The finding of the Higgs boson is a crucial step, as it would be the final confirmation of the tremendous success of the Standard Model.
The Standard Model
The Standard Model of particle physics is a framework based on very fundamental principles of physics. It describes the interaction between different particles and the three forces electromagnetism, weak and strong. Although there are a number of freely adjustable parameters, the Standard Model has been the most successful theory of physics ever. The progress of physics in this direction has been extremely rapid, especially in the 1950’s to the 1990’s. Each of the particles predicted by the Standard Model has been detected, giving both theorists and experimentalists enormous confidence that this is the correct model. Theory has always been immediately confirmed by experiments, and they have invariably confirmed the Standard Model predictions! All that remains is finding the Higgs and this one last piece is playing hard-to-get.
Many physicists are tensed about the prospect of there being no Higgs! Many others, among them notably Nobel Prize winner Steven Weinberg, feels that it would be exciting if the Standard Model Higgs is not found! There are many alternative models and these would then gain center stage.
All in all, it is safe to say that this one announcement may be the fork in the path for physics going forward. Higgs or no Higgs – that is the question. The answer comes on the 13th!