Astronomers Find Rare 5-Star System


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An illustration of two contacting stars — part of the newly discovered bizarre five-star system.

Scientists have discovered an absolutely bizarre star system about 250 light years away, in the constellation Ursa Major.

The system (officially known as 1SWASP J093010.78+533859.5) features five stars that are all gravitationally bound together. Two orbit each other in what’s called a contact eclipsing binary, meaning they’re so close together that they actually share an atmosphere, with gases flowing between them.

Another two stars also orbit each other, but at a much greater distance — about 1.8 million miles, which is more than twice the diameter of the sun. Another star hangs out near that pair, but doesn’t appear to orbit them.

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Systems that include five stars gravitationally bound together are rare, though not unprecedented (astronomers have actually found systems that include as many as six stars). But this is the first one ever found that includes multiple pairs of stars orbiting each other.

The discoverers of the strange system — a team of astronomers from Open University in the UK and elsewhere — presented all these discoveries in a new paper published in the journal Astronomy & Astrophysics. Thanks to George Dvorsky at io9 for bringing it to our attention.

Source: vox.com

SpaceX’s rocket just exploded. Here’s why that’s such a big deal.


SpaceX’s unmanned Falcon 9 rocket launched from Cape Canaveral, Fla., on Sunday but exploded a few minutes after liftoff. It was on a mission to resupply the International Space Station. (NASA)

An unmanned SpaceX Falcon 9 rocket bound for the International Space Station exploded a couple of minutes after liftoff Sunday morning. It was the third cargo mission to the space station to be lost in recent months.

Elon Musk, SpaceX’s founder tweeted that “there was an overpressure event in the upper stage liquid oxygen tank.” He added: “That’s all we can say with confidence right now. Will have more to say following a thorough” analysis.

NASA officials said it was not clear what caused the explosion. During an afternoon press conference William Gerstenmaier, NASA’s associate administrator for human exploration and operations, said there was “no negligence here.”

The three failures from three different launch providers show “the challenges facing engineering and the challenges facing space flight in general.”

The rocket took off from Cape Canaveral, Fla., at 10:21 a.m., and everything seemed fine until 2 minutes at 19 seconds. Then video of the launch showed harrowing, if now familiar, images of a rocket exploding into a plume of smoke. The Falcon 9 was carrying more than 4,000 pounds of food and supplies to the space station, where American Scott Kelly is spending a year. There were no astronauts onboard.

The explosion also lost many student experiments and a water filtration system. Also onboard was a piece of hardware that would be used to help two new crew vehicles dock to the station.

Source : Wahshington Post

The Largest void in universe Discovered


Hubble image of MACS J0717

Astronomers have detected the universe’s largest known cosmological supervoid in the Southern constellation of Eridanus.  Spanning some 1.8 billion light years !!!!!!!

(1 Light Years ~ 9 Trillion Kilometer)

It might be the single largest structure ever in the universe, and the only sign of it is nothing – just empty space 1.8 billion light years across. That’s 18,000 times larger than our entire galaxy.

the team remains mainly baffled as to why such an extensive void — in which the “density of galaxies is much lower than in the known universe” — could have actually arisen.

“This supervoid is certainly rare,” Greg Aldering, a cosmologist at Lawrence Berkeley National Lab in California, told Forbes.  “Underdense by about 30 percent, it’s not completely empty.  But what’s rare is the [spatial] extent of this void itself.”

Source : Forbes

Hubble Space Telescope turns 25 and Here are some of the Most Amazing Pictures Taken by it


Hubble Space Telescope marks 25th anniversary in orbit this week. So, There are some  best images taken by Hubble Space Telescope during its 25 years journey. These Images are 100% real and contains no CGI

Hubble has traveled 3.4 billion miles, circling Earth nearly 137,000 times and making more than 1.2 million observations of more than 38,000 celestial objects, according to the Space Telescope Science Institute in Baltimore. The most distant objects spotted by Hubble — primitive galaxies — are some 13 billion light-years away and date to within 400 million or so years of the universe’s origin, known as the Big Bang.

Hubble provides an average of 829 gigabytes of archival data every month, according to the institute. Altogether, Hubble has produced more than 100 terabytes of data.

Some of the images have description about it. if anyone wants to read image description just click that image. and  Enjoy……

Image Credit : hubblesite.org

Source:Fox news

[Video] Space’s 10 Most Gigantic Disasters


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Here are the 10 Most Biggest Explosions and Impacts Ever Known in Space.

Enjoy the video…

Source : Hybrid Librarian (Video Uploader)

[Video] Humanity’s 5 Farthest Reaches Into Space


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Here are the Top 5 Humanity Farthest reaches into Space.

Enjoy the video….

Source : Dark5 (Video Uploader )

NASA and SpaceX targeting Dec. 19 for next Space Station Launch


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ISS under construction (Click Image to Download)

NASA and SpaceX are now targeting Dec. 19 as the launch date for the next unmanned cargo run to the International Space Station (ISS) under NASA’s Commercial Resupply Services contract.

The fifth SpaceX cargo mission was postponed from Dec. 16 to Dec. 19 to “allow SpaceX to take extra time to ensure they do everything possible on the ground to prepare for a successful launch,” according to a statement from NASA.

The Dragon spacecraft will launch atop a SpaceX Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida.

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A SpaceX Falcon 9 at Cape Canaveral launch pad 40 is slated to launch on Dec. 19, 2014 on the CRS-5 mission. Credit: Ken Kremer – kenkremer.com

Both the Falcon 9 rocket and its Dragon spacecraft are in good health, according to NASA.

The mission dubbed SpaceX CRS-5 is slated for liftoff at 1:20 p.m.

An on time liftoff will result in a rendezvous with the ISS on Sunday. The crew would grapple the Dragon with the stations 57 foot long robotic arm at about 6 a.m.

See more at : Universe Today

Isro to Test-Fly Heaviest Rocket, Crew Module on December 18


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India will test-fly its heaviest and upgraded rocket – the Geosynchronous Satellite Launch Vehicle (GSLV-Mark III) – on December 18, space agency Isro said Friday.

According to a tweet by the Indian Space Research Organisation (Isro), the 630-tonne rocket will be powered by liquid and solid fuel engines while the cryogenic stage/engine will be a passive one.

The rocket will also carry a crew module to test its re-entry characteristics.

“The main purpose of the mission is to test the atmospheric characteristics and stability of the rocket on its way up. We also decided to use this opportunity to test one component of the crew module – a human space mission that India may embark on at a later date,” M.Y.S Prasad, director of the Satish Dhawan Space Centre in Sriharikota, told reporters in a recent interaction.

The experimental mission will cost Rs. 155 crores and will not carry any satellite as the cryogenic engine needed for the purpose is still under development, he said.

“This will be India’s new launch vehicle. It is bigger and can carry satellites up to four tonnes,” said GSLV Mark III project director S. Somanath.

The main objective of the crew module is to demonstrate its re-entry flight and aero braking, and end-to-end parachute system validation.

The rocket will go up to 126km and the crew capsule will then detach and fall into the Bay of Bengal, 20 minutes after blast-off.

The descent speed of the crew module will be controlled on board motors for some distance and then by three parachutes.

The module will splash down 600km from Port Blair and 1,600km from the space centre. The capsule will be recovered by an Indian Coast Guard or Indian Navy ship.

Source : NDTV

ALMA Identifies Gas Spirals as a Nursery of Twin Stars


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With new Atacama Large Millimeter/submillimeter Array (ALMA) observations, astronomers led by Shigehisa Takakuwa, Associate Research Fellow at the Institute of Astronomy and Astrophysics, Academia Sinica (ASIAA), Taiwan, have found spiral arms of molecular gas and dust around “baby twin” stars. Gas motions supplying materials to the twin were also identified. These results unveil for the first time, the mechanism of the birth and growth of binary stars, which are ubiquitous throughout the Universe. The study was published on November 20 in The Astrophysical Journal.

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Fig 1. Gas and dust disks around L1551 NE spotted by ALMA. Credit: ALMA (ESO/NAOJ/NRAO) / Takakuwa et al.

Stars form in interstellar clouds of molecular gas and dust. Previous studies of star formation focused primarily on single stars like the Sun, and a standard picture of single star formation has been established. According to this picture, a dense gas condensation in an interstellar cloud collapses gravitationally to form a single protostar at the center. Previous observations have found such collapsing gas motions feeding material toward the central protostars.

Compared to single star formation, our understanding of binary star formation has been limited, even though more than half of stars with a mass similar to that of the Sun are known to be binaries. It is thus crucial to observe the physical mechanism of binary formation to obtain a more comprehensive understanding of star formation. Theory suggests that a disk surrounding a young binary will feed material to the central “baby twin” in order for them to grow. While recent observations have found such disks (known as “circumbinary disks”), it was not possible to image the structure and gas motions because of the insufficient imaging resolution and sensitivity.

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Fig 2. Comparison of the disks in simulation and observation. The right panel shows the disk image simulated with ATERUI, and the left panel the real ALMA image. Credit: ALMA (ESO/NAOJ/NRAO)/ Takakuwa et al.

Continue reading ALMA Identifies Gas Spirals as a Nursery of Twin Stars

Ancient Mars May Have Been More Habitable Than We Thought


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An artist’s impression of what ancient Mars may have looked like, based on geological data (Click Image to Download)

Data collected by the Curiosity Rover suggests Mars once featured a moderate climate capable of fostering lakes of liquid water and even a vast sea, and that this climate could have extended to many parts of the Red Planet.

NASA’s Curiosity Rover is currently investigating the lowest sedimentary layers of Mount Sharp, a section of rock 500 feet (150 meters) high known as the Murray formation. Observations taken by the robotic probe suggests the mountain was produced by sediments deposited in a large lake bed over tens of millions of years. The observation strongly suggests that ancient Mars maintained a long-lasting water-friendly climate.

According to NASA scientists, it’s an hypothesis that’s challenging the notion that warm and wet conditions were transient, local, or only underground. It now appears that Mars’ ancient, thicker atmosphere raised temperatures above freezing globally, but NASA scientists aren’t entirely sure how the atmosphere produced the required effects.

A Mountain in a Crater

Scientists have struggled to explain why the mountain sits inside a crater. Last year, a study suggested that the 3.5-mile-tall Mount Sharp formed as strong winds carried dust and sand into the crater in which it rests. It was actually bad news at the time because it suggested that the Gale Crater probably never contained a lake, which was one of the primary reasons why NASA sent Curiosity there in the first place.

But this new analysis has revived an older theory which suggests that Mount Sharp is the eroded remnant of sedimentary layers that once filled the crater — layers of silt that were originally deposited on a massive lakebed.

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Cross-bedding seen in the layers of this Martian rock is evidence of movement of water recorded by waves or ripples of loose sediment the water passed over. Image credit: NASA/JPL-Caltech/MSSS.

Thanks to on-the-ground observations made by Curiosity, NASA scientists have now caught a glimpse of Mount Sharp’s lower flanks, which feature hundreds of rock layers. These layers, which alternate between lake, river, and wind deposits, bear witness to the repeated filling and evaporation of a Martian lake. Rivers carried sand and silt to the lake, depositing the sediments at the mouth of the river to form deltas. It was a cycle that repeated over and over again.

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Cross-bedding seen in the layers of this Martian rock is evidence of movement of water recorded by waves or ripples of loose sediment the water passed over. Image credit: NASA/JPL-Caltech/MSSS.

“The great thing about a lake that occurs repeatedly, over and over, is that each time it comes back it is another experiment to tell you how the environment works,” noted Curiosity Project Scientist John Grotzinger in a NASA report. “As Curiosity climbs higher on Mount Sharp, we will have a series of experiments to show patterns in how the atmosphere and the water and the sediments interact. We may see how the chemistry changed in the lakes over time. This is a hypothesis supported by what we have observed so far, providing a framework for testing in the coming year.”fcc2setcjpg8el3rhq77

After the sediments hardened to rock, the resulting layers of sediment were sculpted over time into a mountainous shape by wind erosion that carved away the material between the crater perimeter and what’s now the edge of the mountain.

Greater Potential for Life?

The new discovery has major implications for our understanding of the Red Planet. It suggests Mars was far warmer and wetter in its first two billion years than previous assumed. It also suggests that Mars experienced a vigorous and dynamic global hydrological cycle that involved rains or snows to maintain such moderate conditions.

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A pic depicting a lake of water partially filling Mars’ Gale Crater, receiving runoff from snow melting on the crater’s northern rim. Image credit: NASA/JPL-Caltech.

Source : io9.com