The Watchers

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Garbage patches across the oceans - visualization experiment

The experts estimated about 70% of litter that ends up in the world's oceans, sinks to the bottom. The rest of the marine debris remains floating under the ocean surface and is carried around by the ocean currents. The floating debris mainly contains undegradable tiny plastic particles that can mix with larger items, such as fishing gear or shoes, and concentrates in parts of the ocean, gradually forming the so-called garbage patches, or marine trash vortices.

The Great Pacific Garbage Patch, is the largest collection of marine debris in the world. It spans waters from the West Coast of North America to Japan. Two other areas of high trash concentration are the garbage patches in the Atlantic and Indian ocean.

Greg Shirah and Horace Mitchell have published their garbage patch visualization experiment results online on August 10, 2015, in the NASA's Scientific Visualization Studio. Their animations were also presented on the SIGGRAPH 2015 conference.

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30 large whales found dead along the coast of Alaska, a cause remains unknown

30 dead large whales have been found since May 2015, along the Western Gulf of Alaska and southern shoreline of the Alaska Peninsula. Simultaneous increase in the number of large whale strandings in British Columbia, Canada, got the scientists on both ends to start an active investigation. The "Unusual Mortality Event" (UME) for large whales has been declared for the first time on Alaska. 

An unusually high number of large whale deaths has been reported across the Western Gulf of Alaska, in the regions around Kodiak Island, Afognak Island, Chirikof Island and the Semidi Islands, and along the southern shoreline of the Alaska Peninsula. 11 fin whales, 14 humpback whales, one gray whale and four unidentified whale species have been found dead in the Western Gulf of Alaska.

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A new computer simulation suggest our early Solar System was inhabited by a fifth giant planet

A new research, published on August 10, 2015, suggests a cluster of icy bodies located in the same areas as Pluto, might prove our early Solar System was inhabited by a fifth giant planet. During Neptune's migration, 4 billion years ago, the ice giant might have jumped into it's current orbit and scattered a cluster of it's satellites into the outer solar system, the Kuiper belt.

A cluster of about thousand icy rocks, the so-called "kernel" of the Kuiper belt, is an old mystery for astronomers. The rocks hover close to one another and never change it's moving direction from the same orbital plane as the planets, unlike other icy bodies that constitute the belt.

Previous research suggested the objects bound this way could have formed during a violent collision of bigger parent bodies. However, it turned out the collisional families would have to be stretched along the Kuiper belt, which proved the proposition invalid.

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Sakurajima's alert leved raised to second highest just days after nearby nuclear plant restarts

The Japan Meteorological Agency has raised the alert level of Sakurajima volcano to 4 out of 5 (prepare to evacuate) on August 15, 2015 after detecting a strong swarm of shallow volcanic earthquakes beneath the Showa crater.

The news comes just 4 days after Kyushu Electric Power Co. began bringing online the No 1. reactor at its Sendai nuclear power station on August 11. This, by the way, is the first nuclear facility to restart in Japan under new safety rules implemented following the 2011 Fukushima disaster. It is located just 50 km (31 miles) from Sakurajima.

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Geomagnetic storm reaching G3 (Strong) levels in progress, extreme conditions possible

During the last 24 hours, solar wind parameters, measured by the ACE spacecraft, were indicative of background solar wind conditions until 07:45 UTC on August 15, when a sudden impulse occurred due to the arrival of a co-rotating interaction region (CIR) ahead of a recurrent positive polarity coronal hole high speed stream (CH HSS), SWPC reported at 12:30 UTC today.

Solar wind speeds jumped from near 350 km/s to near 500 km/s. IMF total field strength jumped from 11 nT to as high as 28 nT, while the maximum southward deflection of the Bz component was -20 nT.

Geomagnetic storm reached G1 (Minor) conditions at 11:25, G2 (Moderate) at 11:32 and G3 (Strong) at 11:43 UTC.

Additionally, a partial halo Coronal Mass Ejection (CME) produced by the solar filament eruption at 13:32 UTC on August 12 is expected to arrive early August 16. This is expected to further contribute to the already enhanced conditions.

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Perseid meteor shower: year's greatest meteor show peaks on August 12 and 13

The peak of this year's Perseid meteor shower is just around the corner, forecasted during the overnight hours of August 12 and 13 in the absence of any or much moonlight.

Perseids originate in Comet 109P/Swift-Tuttle, which was discovered in 1862 by Lewis Swift and Horace Tuttle. This is a large comet with estimated size of nucleus about 26 km (16 miles).

This is one of the most plentiful showers, with 50 - 100 shooting stars seen per hour, visible from all over the northern hemisphere.

This meteor shower is known for its very fast and bright meteors which leave long wakes of light and color as they streak through the atmosphere. Fireballs, larger explosions of light and color that can persist longer than an average meteor streak, are also associated with this shower and you can expect an increase in fireball events around its peak.

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The largest structure of the observable universe found - a ring of galaxies five million light years across

A Hungarian-US team of astronomers have found what may be the largest structure in the observable universe, a circular ring of nine gamma ray bursts and hence nine galaxies that stretches five billion light years across.

Gamma-ray bursts (GRBs) are the most luminous events in the observable universe. These events occur when massive stars in a galaxy collapse into black holes. Astronomers have used these GRBs to locate and map the locations of their distant host galaxies. Such bursts are cataloged in the Gamma Ray Burst Online Index, a precise listing of burst distances and locations, creating a cosmic map.

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Japanese scientists find signs of radiation poisoning in 17 dead dolphins near Fukushima

Seventeen dolphins found mysteriously beached near the site of the crippled Fukushima Daiichi nuclear power plant may have died from radiation-induced heart damage, a scientific analysis has suggested.

In March 2011, a massive earthquake and tsunami triggered meltdowns at three of the Fukushima reactors. The ensuing explosions ejected massive amounts of radiation into the air, most of which later settled into the Pacific Ocean. Since then, groundwater has continued to leak into the failed reactors, becoming radioactive from contact with the nuclear material there. Much of this water has made it back to the sea, either accidentally or through deliberate releases by plant operator Tokyo Electric Power Company (TEPCO).

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Night sky guide for August 2015

Every year, sky watchers in northern hemisphere enjoy in one of the best meteor showers of the year - Perseids. This year, Perseids will peak on the night of August 12 and the morning of August 13. This meteor shower is known for its very fast and bright meteors which leave long wakes of light and color as they streak through the atmosphere. Fireballs, larger explosions of light and color that can persist longer than an average meteor streak, are also associated with this shower and you can expect an increase in fireball events around its peak.

The thin crescent moon will be no match for the bright Perseids this year so be prepared for a great show.

The best time of the month to observe faint objects such as galaxies and star clusters - New Moon - is scheduled for August 14.

Planet Venus will reach inferior solar conjunction on August 15 and will be totally unobservable for several weeks. This marks the end of its apparition in the evening sky and its transition to become a morning object over the next few weeks.

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Unusual red arcs spotted on the surface of Saturn's icy moon Tethys

New enhanced-color images from NASA's Cassini spacecraft revealed unexplained arc-shaped, reddish streaks on the surface of Saturn's icy moon Tethys.

The red arcs are narrow, curved lines on the moon's surface, and are among the most unusual color features on Saturn's moons to be revealed by Cassini's cameras.

Images taken using clear, green, infrared and ultraviolet spectral filters were combined to create the enhanced-color views, which highlight subtle color differences across the icy moon's surface at wavelengths not visible to human eyes.

A few of the red arcs can be seen faintly in observations made earlier in the Cassini mission, which has been in orbit at Saturn since 2004. But the color images for this observation, obtained in April 2015, are the first to show large northern areas of Tethys under the illumination and viewing conditions necessary to see the arcs clearly...

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