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| Meteor (32) | |
| Meteor shower (21) | |
| Meteorite (36) | |
| Meteoroid (6) | |
The discovery reported in the journal Science lends weight to the idea that biologically crucial molecules like amino acids that are commonly found in meteorites are produced early in the process of star formation even before planets such as Earth are formed.
#Russian meteor was a wake-up call University of California Davis rightoriginal Studyposted by Andy Fell-UC Davis on November 18 2013consumer video cameras
and advanced laboratory techniques gave scientists an unprecedented opportunity to study the meteor that exploded over Chelyabinsk Russia in February. f humanity does not want to go the way of the dinosaurs we need to study an event like this in detailsays Qing-zhu Yin professor
and planetary sciences at University of California Davis. Saying it was a ake-up callyin says the Chelyabinsk meteorite the largest strike
since the Tunguska event of 1908 belongs to the most common type of meteorite an rdinary chondrite. f a catastrophic meteorite strike were to occur in the future it would most likely
be an object of this type. ur goal was to understand all circumstances that resulted in the damaging shock wave that sent over 1200 people to hospitals in the Chelyabinsk Oblast area that daysays Peter Jenniskens meteor astronomer at SETI Institute.
The explosion was equivalent to about 600 thousand tons of TNT 150 times bigger than the 2012 Sutter s Mill meteorite in California.
Based on viewing angles from videos of the fireball researchers calculated that the meteoroid entered Earth s atmosphere at just over 19 kilometers per second slightly faster than had previously been reported. ur meteoroid entry modeling showed that the impact was caused by a 20-meter sized
A meteoroid is the original object; a meteor is the hooting starin the sky; and a meteorite is the object that reaches the ground.
The meteor s brightness peaked at an altitude of 29.7 km (18.5 miles) as the object exploded.
For nearby observers it briefly appeared brighter than the sun and caused some severe sunburns.
The team estimated that about three-quarters of the meteoroid evaporated at that point. Most of the rest converted to dust
and only a small fraction (4000 to 6000 kilograms or less than 0. 05 percent) fell to the ground as meteorites.
The dust cloud was so hot it glowed orange. The largest single piece weighing about 650 kilograms was recovered from the bed of Lake Chebarkul in October by a team from Ural Federal University led by Professor Viktor Grokhovsky.
These veins would have weakened the original meteoroid. Yin s laboratory carried out chemical and isotopic analysis of the meteorites and Ken Verosub professor in the department of earth and planetary sciences measured the magnetic properties of metallic grains in the meteorite.
Doug Rowland project scientist in the Center for Molecular and Genomic Imaging in the department of biomedical engineering contributed X-ray computed tomography scanning of the rock.
Major meteorite strikes like Tunguska or Chelyabinsk occur more frequently than we tend to think Yin says.
For example four tons of material were recovered from a meteor shower in Jilin China in 1976. helyabinsk serves as unique calibration point for high energy meteorite impact events for our future studies. he work was supported by the Russian Academy of Sciences the Office
a mineral we have seen only previously in meteorites, and not On earth. Fortunately, as with many scientific discoveries, this accident was a happy find.
#Meteorite carries ancient water from Mars It may just look like your average rock, but in fact it's an extra-special delivery from the red planet.
Laboratory analysis has revealed that a specimen bought from a Moroccan meteorite dealer in 2011 is the first sample of Martian origin that is similar to the water-rich rocks examined by NASA s rovers.
The meteorite, dubbed Northwest Africa (NWA) 7034, contains a concentration of water by weight about ten times higher than in any of the other 100
or so known Martian meteorites#those rare rocks that get ejected from the Martian surface into space when an asteroid hits the planet,
Carl Agee of the University of New mexico in Albuquerque and his colleagues report their findings from samples of the meteorite in Science online today1."
The meteorite, he adds, is"the first of a new class of Martian meteorites that provides more direct clues to the surface history of Mars. Moreover,
Humayun says, NWA 7034 may provide the only direct corroboration for the rovers observations for some time to come,
found in the Sahara desert, has a higher water content than any Martian meteorite previously analysed.
The elemental composition of the meteorite strongly resembles that of rocks examined in 2005 by NASA s Spirit rover at Gusev Crater2.
NWA 7034 is the second-oldest Martian meteorite, and provides a missing link in the planet s geological record,
The oldest prospective Martian meteorite, ALH 84001, is 4. 5 billion years old, whereas all other Martian meteorites are 1. 3 billion years old or younger.)
Several lines of evidence indicate that parts of Mars were warmer and wetter, and therefore a possible haven for carbon-based life, some 4 billion years ago.
That is not a surprise, given the map of hydrogen (a stand-in for water) generated by an instrument on the Mars Odyssey orbiting spacecraft and the presence of small amounts of water in younger Martian meteorites
The meteorite is made of volcanic rock, and the presence of water in it suggests that crustal rocks on Mars interacted with surface water that was delivered by volcanic activity,
#Swedish space rock may be piece of early life puzzle A fossil meteorite unlike anything seen before has been uncovered in a Swedish quarry.
Roughly 100 fossil meteorites have emerged from the limestone quarry west of Stockholm which is being mined for flooring.
All of the meteorites are part of an iron-poor class called the L chondrites. They date back about 470 million years to the Ordovician period
when Earth experienced a mysterious burst of new species. Now miners working in the Swedish quarry have found a meteorite fragment that is not an L chondrite.
Fossil meteorites from the quarry suggest that during this time impacts were tens to hundreds of times more frequent than they are today.
The meteorites may have been born when two asteroids collided and broke apart between Mars and Jupiter.
According to one popular idea this intense meteor shower caused just enough destruction to open up ecological niches
The team may at last have identified the impactor responsible for the break up of the parent body of the L chondrite meteorites he says.
Data from NASA's Galileo probe which orbited Jupiter from 1995 to 2003 show clay-like minerals on Europa's surface probably debris from meteor impacts
or micrometeoroids says a JAXA spokesperson. Not everyone is convinced of the idea. A net isn't necessarily the best option to collect debris says Hugh Lewis an aerospace engineer at the University of Southampton UK.
and structure of ancient rocks either meteorites that made it to Earth from those planets
but a list of ideas from the developers includes tracking meteorites and making a 3d model of Earth's magnetosphere.
#Perseids meteor shower will show hundreds of shooting stars across Europe Stargazers across Britain were treated to a stunning lightshow overnight as hundreds of shooting stars filled the sky as the annual Perseids meteor shower neared its peak.
and the north of England as limited cloud cover allowed the hotly-anticipated meteor shower to light up the sky.
with the Perseids offering one of the greatest displays of the past seven years as the meteor shower coincides with a new moon for the first time since 2007.
Scroll down for videolast night's dazzling display was just the beginning of this year's Perseids meteor shower,
the Perseids reach their peak tonight with more than 100 meteors an hour expected to be produced.
Professor Mark Bailey, director of Armagh Observatory in Northern ireland, called the Perseids the'best and most reliable meteor shower of the year'.
these meteors are bright enough for a few to be visible.''The moon is out of the way
and this will make it easier to see the fainter meteors and ring up the numbers.''The Perseids are usually fairly bright.
You can see the train hanging there glowing in the sky for a few seconds-sometimes for several minutes-after the meteor has gone.'
'Meteors are the result of particles as small as a grain of sand entering the Earth's atmosphere at high speed
The meteor show is named after the constellation Perseus as when viewed from the ground the shower seems to come from a focal point, known as a radiant, in the constellation.
#Perseid Meteor shower: Best Places to See'Shooting stars'This Week The annual Perseid meteor shower is typically the most spectacular"shooting star"display for people in the Northern hemisphere,
and this week, skywatchers could be in for a remarkable show. The meteor shower peaks during the overnight hours tomorrow (Aug 12) and Thursday (Aug 13),
and weather permitting, stargazers can expect to spot an average of one meteor per minute radiating from the constellation Perseus in the northern sky, somewhat near the North pole.
At the meteor shower's peak, skywatchers could see as many as 100 meteors per hour according to NASA.
Meteor showers occur when the Earth, on its orbital path through space, collides with particles from a comet or an asteroid.
The Perseids come from the tail of Comet Swift-Tuttle, which last made its closest approach to Earth in 1992.
This week marks the peak of the Perseid meteor shower, but the sky show will continue through Aug 24.
because light pollution will wash out the fainter meteors. And be sure to give your eyes time to adjust to the dark.
Even though a telescope is needed not to view a meteor shower your local observatory might have people on hand to tell you more about skywatching.
NASA'S MARSHALL SPACE FLIGHT CENTER in Huntsville, Alabama, will be livestreaming views of the meteor shower from 10 p m. EDT tomorrow to 2 a m. EDT on Thursday (Aug 13.
Meteor experts Bill Cooke, Danielle Moser and Rhiannon Blaauw, all from NASA Meteoroid Environment Office at the Marshall Space flight Center, will also provide onair commentary.
though, meteor showers do occur throughout the year. Other prominent showers include the Leonids (in November) and the Quadrantids (in January) u
Results from the METEOR trial Patients with advanced kidney cancer live for nearly twice as long without their disease progressing
about results from the first 375 patients out of a total of 658 patients recruited to the phase III clinical METEOR trial comparing cabozantinib with everolimus,
The results of the METEOR trial indicate that cabozantinib is able to shrink tumours and slow down tumour growth much better than current standard treatment in patients who previously received VEGFR-targeted drugs.
"An early evaluation of overall survival from the ongoing METEOR trial has shown a strong trend indicating that survival may be improved in patients receiving cabozantinib compared to standard therapy.
Patients recruited to the METEOR clinical trial, which started in June 2013, were randomised to receive either 60 mg a day of cabozantinib in tablet form,
The METEOR trial is also evaluating the safety of the treatment. The incidence of serious side effects was similar for both drugs
"The METEOR results are important from a clinical and scientific point of view. Overcoming mechanisms of tumour escape
The results of the METEOR study are remarkable and most likely will be practice changing. This, together with the report of the Checkmate 025 study, are definitely among the highlights of this congress."
#Perseid meteors to light up summer skies The evening of Wednesday 12 august into the morning of Thursday 13 august sees the annual maximum of the Perseid meteor shower.
Meteors (popularly known as hooting stars are the result of small particles, some as small as a grain of sand, entering the Earth atmosphere at high speed.
This shower of meteors appears to originate from a single point, called a adiant in the constellation of Perseus, hence the name.
although for most of that period only a few meteors an hour will be visible. From the UK, the peak of the shower occurs in the late evening on 12 august to the morning of 13 august,
when as many as 100 meteors or more may be seen each hour. This year, for the first time since 2007, this peak coincides with a new moon on 14 august,
creating ideal dark sky conditions for meteor-spotting. Perseid shooting star near the Pleiades over Woodingdean, Sussex, on the early morning of the 13th,august 2013.
Professor Mark Bailey, Director of Armagh Observatory, said he Perseid meteor shower is one of the best and most reliable meteor showers of the year.
and so be observable soon after dark. nlike many celestial events meteor showers are straightforward to watch,
Advice from experienced meteor observers is to wrap up well and set up a reclining chair to allow you to look up at the sky in comfort.
Although the number of visible meteors is hard to predict accurately, at least one every few minutes can be expected.
the meteorite Zagami, which formed about 180 million years ago, and fell to Earth in 1962."
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