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Total solar eclipse could be seen in Australia in November 2012, the first of its kind in the region in 1300 years Photo: AFP

A rare solar eclipse can be followed in some states in the North and Northeast of Brazil and parts of Africa, Europe and the United States on Sunday, when the moon had covered the sun partially or totally, depending on the observer’s location. This should be the last solar eclipse of 2013, and can be seen in the country in the morning, between 9am and 11am (GMT).

See map of the path of the eclipse

The rounded shape of the earth, leaving some regions of the planet closest to the moon, explains why some viewers of western Africa will see a total eclipse, while those who are in Brazil, in the eastern United States or in southern Europe will only see the sun partially hidden. In any case, experts recommend not to look directly at the Sun during this unusual hybrid eclipse, unless you use a special glass or observe the phenomenon indirectly, using a filter. Sunglasses protect the eyes not common enough, warned.

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Most of the eclipse will take place at 10h37 Brasília in the Atlantic Ocean, 330 km southwest of Liberia, according to a NASA site on the internet that records eclipses. In Brazil, the annular eclipse can only be seen in its partial form – ie the size of the moon in the sky will not be enough to completely cover the Sun

In Gabon, West Africa, the total eclipse can be seen. At the peak of the phenomenon on Earth, in the central African country, around 11:50 Brasilia, the sun will be hidden for a minute or so. The solar eclipse will last for ten seconds in northern Kenya.

If weather conditions permit, the partial phases of the eclipse can be observed in southern Europe, including some parts of Spain, Italy and Greece. In the eastern United States, viewers will see a partial eclipse shortly after sunrise, as well as in Brazil, where the sunlight must escape around the moon

With information from AFP.

Moon occult Venus; see images of astronomical phenomenon

Earth

Nearly 90 people “on the verge of losing” their housing allowance will benefit from the rent created by the Municipal Chamber of Lisbon. The expectation of Councillor for Housing, Paula Marques, is the first monthly allowance to be delivered during the month of November.

Applications to this support program, created during the previous municipal mandate began on 2 September and ended on Thursday. During this period there were 953 people on the Internet, but only 390 eventually formalize the application, which could only be done online .

According

said Councilwoman Housing Publico, 88 applications received by the Lisbon City are able to be approved. Paula Marques adds that the City’s Rent Subsidy has “a range of very large extent”, addressing the essential people “on the verge of losing their homes for various reasons.”

Among these reasons include the existence of liens of the Tax and Customs Authority on houses or eviction actions, reductions in household incomes greater than or equal to 35% unemployment by one of its elements. Could also apply to grant municipal tenants who have seen the income from your home to increase under the new law of rents and have no “solvency capacity.”

Paula Marques admits that some of the authors of the 302 applications that were formalized but not validated by the local authority might, in future, to benefit from this grant the lease, if the files are successfully completed.

This

support of the Lisbon is awarded for one year and covers a third of the monthly income, this income can not exceed 826 euros. Thus, the local authority, which in 2013 funding amounting to € 2.5 million for this program, will pay a maximum of 275 euros per month for each beneficiary.

An image resembling a sketch of Jesus and Mary is all the rage in social networks. The image was found on Google Earth program, which shows images of the Earth.

In a three-dimensional image captured is what many say is the pictures of Jesus and Mary in the skies of Switzerland, near the town of Walensee.

The picture is unclear and appears to show two figures. On the right, smaller would be that of Mary, and the left, with what appears to be a dark cloak, that of Jesus.

The pictures are the talk and many social networks that ensure it is a paranormal phenomenon. Urged by the Morning Post to comment, a source confirmed the existence of Google’s image but declined to comment further.

The register must be captured result of pareidolia effect, which allows the human brain to identify when subject to certain stimuli such as images or sounds, certain objects that are known. It is this effect that allows, for example, look at the clouds and see images of faces or other objects.

Physics

studies the LUX detector searched for evidence of the existence of dark matter. During the first three months of operation of the equipment, the scientists found nothing – which is not necessarily bad

U.S. researchers announced the end of the first phase of operation of the Large Underground Xenon Detector (LUX, its acronym in English), the largest experiment ever conducted to find dark matter, mysterious kind of matter whose composition is unknown by scientists . The news released by researchers on Wednesday is that nothing has been found so far – which is not necessarily a bad outcome.

Located underground in the state of South Dakota, in the Midwest of the United States, the LUX experiment was created by the U.S. government in partnership with seventeen universities only to check for this type of matter. During the first three months of operation, the researchers calibrated their instruments and looked for three types of particles that had been found in previous research and were regarded as possible candidates for dark matter components. With the current results, these three particles can be discarded, leaving scientists with a wide field of research open to be explored.

Thus, the fact that nothing has been found by researchers was celebrated – in science, often a loss can be as important as a positive. “We show that the LUX is already producing the best results in the world and decreasing the space to find a particle of dark matter,” said Matthew Szydagis, researcher at the University of California, and responsible for coordinating the analysis of data among team members LUX.

Matter invisible – Dark matter is an invisible type of matter, whose existence can only be inferred by the researchers, but not directly detected. Since it does not emit or reflect light, scientists have no way of observing it from Earth. She is known only by the gravitational effects it has on the movement of stars in galaxies and clusters of galaxies.

Despite its mysterious nature, it is much more abundant in the cosmos than normal matter, whose existence can be observed. Physicists believe that dark matter accounts for 26.8% of mass and energy density of the universe, compared to 4.9% of ordinary matter. All the rest – 68.3% – is composed of dark energy, a component even more mysterious to which is attributed the expansion of the Universe.

Researchers do not know exactly what the composition of dark matter, but they have some suspicions. The main candidates are called Weak Interaction Massive Particles (WIMPs, its acronym in English), so named because they interact weakly with ordinary matter. The LUX is designed to be the instrument with greater sensitivity to detect WIMPs already done.

Probing the Invisible – Scientists theorize that collisions between WIMPs and normal matter are extremely rare and difficult to detect. “To get an idea of ??how small this probability, imagine shooting a dark matter particle toward a lead block. To get a 50% chance of the interaction between the particle and the lead case, the block would need about 200 light-years long. Therefore, an interaction is incredibly rare, “says Richard Gaitskell, a researcher at Brown University who participated in the study.

If

find WIMPs would already be difficult in ideal research conditions, the task becomes much more complicated in a “polluted” like Earth, which is the target of a steady rain of particles from space – cosmic rays. These particles can produce interactions similar to dark matter and confuse the results obtained by the researchers.

Therefore, the LUX is housed in an abandoned gold mine located about 1.5 km from the surface of the United States, where few foreign matter may enter. To further enhance the isolation, the detector is protected from radiation by immersion in a tank of water.

Read also:
Scientists find evidence of dark matter in space
Study shows more detailed map of the early universe

Eliminating candidates – In the center of this whole mechanism, titanium is a tank containing about 300 pounds of liquid xenon, cooled to – 100 degrees Celsius. If a WIMP achieve a xenon atom, it will be folded down and emit electrons and photons. The electron will be attracted by the electric field at the top of the tank, where it will interact with another layer of xenon gas, releasing more photons.

The apparatus is equipped with light detectors at the top and bottom of the tank, which are capable of detecting the action of a single photon. So, if by chance one WIMP reach the equipment, will be detected immediately, with the precision of a few millimeters. During the first three months of operation of the equipment, however, nothing was found.

The researchers sought specifically for three types of low-mass WIMPs, which had been detected in previous experiments. If they exist, however, have produced more than 1 600 interactions during operation of the detector LUX – or every 80 minutes. The result indicates that the data obtained in other experiments were probably the result of background radiation, not dark matter.

initial experience LUX complete, the team now must make some adjustments to fine tune the sensitivity of the device and start a new experiment in early 2014, with an estimated duration of 300 days. “This is just the beginning for LUX”, said Dan McKinsey, Yale University physicist who worked on the project. “Now that we understand the instrument, we will continue to collect data, testing for other candidates to increasingly elusive dark matter.” If at the end of its operation, the machine has not helped scientists figure out what dark matter is, it will at least have shown that it is not. For physics this is also important.

electricity consumption rose in October for the fourth consecutive month, reducing the slump since January to 0.2%, fueled and renewable production this year 57% of domestic consumption, according to data from REN.

According to the data of REN – Redes National Energy, the electricity consumption recorded in October, an increase of 1.2% over the same month of 2012, which is limited to 0 , 9% correction of the effects of temperature and number of days.

Between January and October this year, consumption showed a downward trend of 0.4% over the same period of 2012, or 0.2% with correction for temperature effects and days.

By the end of October, 57% of national electricity consumption was fueled by renewable sources: hydro 28%, wind 23%, 6% biomass photovoltaic and 1%.

Since coal plants fueled 22% of consumption and natural gas plants 14%.

Note also for the fact that in the early morning of 22 October, wind generation has reached its highest level ever: 3840 Megawatt (MW).

In October, the trend importer who has registered in recent months remained, with annual import balance equivalent at the end of the month, 6% of total consumption.

international experience, which includes six researchers from Coimbra, reached “a sensitivity to particles, believed to constitute dark matter, two times better” than any other test, today announced the University of Coimbra.

“The dark matter [so called not emit or absorb any type of radiation] is essential to explain the universe, and it is expected to account for over 80% of its mass,” explains the institution.

Research Large Underground Xenon (LUX) is “the world’s most sensitive experiment for the detection of dark matter, reaching a sensitivity to particles thought to constitute the dark matter (Wimps) twice better than any other experience already held ‘ says, in a note released today, the University of Coimbra (UC).

Wimps is the acronym for Weakly Interacting Massive Particles, designating that results to be extremely reduced the probability of those particles interact directly with the matter we call normal (non-dark), which makes their detection particularly difficult in technological terms.

The first results of the experience resulting from the collaboration of 17 research groups from universities and laboratories in the United States , the UK and Portugal, “announced recently from Sanford Underground Research Facility, Lead, South Dakota” (USA), where the experience is installed since 2012, indicate precisely that sense, underlines the UC.

The results of LUX

were “awaited with great expectation ‘as revealed’ the recent news of the prestigious journal Nature,” says the same note.

Experience LUX collected for three months, data the observations of the signals due to interactions between dark matter and normal matter, using “the largest detector ever built for this purpose, installed in the underground laboratory of Sanford,” about 1,500 feet deep.

A LUX uses a detector 350 kg of liquified xenon at a negative temperature of 100 degrees centigrade, and installed such that depth is not receiving ‘the great majority of cosmic rays “, which are absorbed by the rock.

This circumstance makes the probability of the rays arriving at the detector to be “ten million times lower than the surface, not disturbing thus the observation of signs of interaction of the xenon with Wimps detector”, explain the specialists Coimbra involved in the investigation.

The participation of six researchers from the Laboratory of Instrumentation and Experimental Particle Physics and Department of Physics at UC LUX is’ fundamental ‘in project’ both engineering (being responsible for subsystems associated with the detector and having been involved in all stages of installation in underground laboratory) as the analysis and processing of data, “says UC.

The LUX will soon start a new search period dark matter with this detector with an expected duration of one year.

However, ‘are already underway preparations for the construction of a new detector to succeed LUX, using the same technology. Housed in the same laboratory, but with a mass of xenon seven tons and a sensitivity about 200 times better, ‘says UC.

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