+++Brilliant meteor seen over parts of... Europe w/video
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+++Brilliant meteor seen over parts of Europe tonight+++ Did you see it? A brilliant meteor was reported in the skies over Hungary, Slovenia, Austria,...
Fireball events recorded by the SMART Project
SAO/NASA ADS Title: Fireball events recorded by the SMART Project. Authors: José María Madiedo. Affiliation: AA(Universidad de Huelva, Facultad de Ciencias Experimentales. ) Publication: eMeteorNews, eZine, ISSN 2570-4745 Online publication http://meteornews.org, vol. 3, no. 1, p. 47-48.
Glass 'Bread Crumbs' Could Lead the Way to Missing Crater
Live Science
A spattering of miniscule glass "beads" found in the mountains of Antarctica may lead the way to an 800,000-year-old meteor impact crater. The tiny spheres, known as microtektites, are each no wider than a human hair. They were sprayed into the atmosphere by a 12-mile-wide (20 kilometers) meteor ...
When can you see the Lyrid meteor shower and where is the best place to see this astronomical ...
Hertfordshire Mercury
Skywatchers and meteor shower lovers are set for another fantastic display this month as the Lyrids are set to appearing in the sky. This astronomical event ... As the bits of debris from the comet crash through the Earth's upper atmosphere they vaporise, turning into the colourful meteor shower. The Lyrid ...
Imagine We Have A Meteor Entering The Atmosphere...
Chegg
Answer to . Imagine we have a meteor entering the atmosphere at 30 km/s (a) Let's model the Earth's atmospheric density as an expo...
2018 The FIFTH Year of "CERTAIN Uncertainty" ™ / Meteors, Asteroids, Comets, and MORE!!
Showing posts with label TEKTITES. Show all posts
Showing posts with label TEKTITES. Show all posts
05 April 2018
The Latest Worldwide Meteor/Meteorite News 05APR2018
Glassy beads hint at site of mysterious missing crater
Imperial College London
Around 800,000 years ago, a 20 kilometre meteor collided with the earth, producing a zone of debris in Australasia which covers a tenth of the Earth's surface. However, despite the impact's relatively young age in geological terms, and the meteor's size, the resulting crater's location eludes us.
The stunning Lyrid meteor shower and the best places in Bristol to watch it
Bristol Post
That means the Lyrid showers are earlier than others throughout the year, with the Perseid meteor shower in the autumn normally peaking at 1am. Experts recommend people to look up towards the east to see the shooting stars from the Lyrids. The skies are expected to be clear on the nights of April 22 ...
We reveal the six unmissable astronomical events in the skies above Lincolnshire this April
LincolnshireLive
This meteor shower is described as one of the most spectacular events to happen in the skies. There could be up to 100 meteors an hour shooting across the sky, but there will be at least 20 on average in an hour. The Lyrid meteor shower is also known for some of its meteors leaving beautiful trails of ...
When is the Eta Aquarids meteor shower in 2018?
Coventry Telegraph
The 2018 Eta Aquarid meteor shower is expected to produce the greatest number of meteors in the small hours before dawn on May 5 and 6. However, the broad peak of the Eta Aquarid shower may present a decent showing of meteors during the hours before dawn on May 4 and May 7. The meteors ...
Harvard physicists say they know how and, roughly, when the world will end
RT
A new study from Harvard University suggests the world is destined to end in much the same way it began… with a really, really, big bang. Theories as to how planet Earth will eventually meet its demise have ranged from nuclear war to a catastrophic meteor collision or a slow fade into darkness.
Meteor wind observations with the MU radar
AGU Publications - Wiley
We conducted meteor wind observations with the middle and upper atmosphere (MU) radar at Shigaraki, Japan (35°N, 136°E), utilizing an interferometer to determine the arrival angle of a meteor echo. We found that meteor echoes are widely distributed in zenith angles as large as 50° and that the ...
Comparison of meteor radar and Na Doppler lidar measurements of winds in the mesopause ...
AGU Publications - Wiley
[1] Simultaneous sodium (Na) Doppler lidar and meteor radar measurements of horizontal winds in the mesopause region over Maui, Hawaii, were collected in July 2002 and October/November 2003. The coincident measurements span 96 hours and altitudes between 80 and 100 km. Statistical ...
It Came From Outer Space! (Sort Of)
SRQ Magazine
None can say for sure, all they know is that a meteor landed on the Venice Elementary School campus last night, skidding across the ground before coming to a stop by a hastily erected tent. And the scientists and caution tape make this serious business. And it is serious business—education. Thanks to ...
2018 The FIFTH Year of "CERTAIN Uncertainty" ™ / Meteors, Asteroids, Comets, and MORE!!
01 November 2009
Libyan Desert Glass-Tektites: Ancient "Atomic Bombs" 1NOV09
Ancient Atomic Bombs
The Epoch Times
Even so, scientists have proposed that the meteorites causing the glass rocks could have exploded several miles above the surface of Earth, similar to the ...
The Epoch Times
Even so, scientists have proposed that the meteorites causing the glass rocks could have exploded several miles above the surface of Earth, similar to the ...
11 August 2009
Meteor/Meteorite News- Tektites Sent Flying 11AUG09
Planet Smash-Up Sends Vaporized Rock, Hot Lava Flying
Jet Propulsion Laboratory
August 10, 2009
http://www.jpl.nasa.gov/news/news.cfm?release=2009-119
PASADENA, Calif. -- NASA's Spitzer Space Telescope has found evidence of
a high-speed collision between two burgeoning planets around a young star.
Astronomers say that two rocky bodies, one as least as big as our moon
and the other at least as big as Mercury, slammed into each other within
the last few thousand years or so -- not long ago by cosmic standards.
The impact destroyed the smaller body, vaporizing huge amounts of rock
and flinging massive plumes of hot lava into space. An artist's
animation of the event is at
http://www.nasa.gov/mission_pages/spitzer/multimedia/spitzer-20090810.html
.
Spitzer's infrared detectors were able to pick up the signatures of the
vaporized rock, along with pieces of refrozen lava, called tektites.
"This collision had to be huge and incredibly high-speed for rock to
have been vaporized and melted," said Carey M. Lisse of the Johns
Hopkins University Applied Physics Laboratory, Laurel, Md., lead author
of a new paper describing the findings in the Aug. 20 issue of the
Astrophysical Journal. "This is a really rare and short-lived event,
critical in the formation of Earth-like planets and moons. We're lucky
to have witnessed one not long after it happened."
Lisse and his colleagues say the cosmic crash is similar to the one that
formed our moon more than 4 billion years ago, when a body the size of
Mars rammed into Earth.
"The collision that formed our moon would have been tremendous, enough
to melt the surface of Earth," said co-author Geoff Bryden of NASA's Jet
Propulsion Laboratory, Pasadena, Calif. "Debris from the collision most
likely settled into a disk around Earth that eventually coalesced to
make the moon. This is about the same scale of impact we're seeing with
Spitzer -- we don't know if a moon will form or not, but we know a large
rocky body's surface was red hot, warped and melted."
Our solar system's early history is rich with similar tales of
destruction. Giant impacts are thought to have stripped Mercury of its
outer crust, tipped Uranus on its side and spun Venus backward, to name
a few examples. Such violence is a routine aspect of planet building.
Rocky planets form and grow in size by colliding and sticking together,
merging their cores and shedding some of their surfaces. Though things
have settled down in our solar system today, impacts still occur, as was
observed last month after a small space object crashed into Jupiter.
Lisse and his team observed a star called HD 172555, which is about 12
million years old and located about 100 light-years away in the far
southern constellation Pavo, or the Peacock (for comparison, our solar
system is 4.5 billion years old). The astronomers used an instrument on
Spitzer, called a spectrograph, to break apart the star's light and look
for fingerprints of chemicals, in what is called a spectrum. What they
found was very strange. "I had never seen anything like this before,"
said Lisse. "The spectrum was very unusual."
After careful analysis, the researchers identified lots of amorphous
silica, or essentially melted glass. Silica can be found on Earth in
obsidian rocks and tektites. Obsidian is black, shiny volcanic glass.
Tektites are hardened chunks of lava that are thought to form when
meteorites hit Earth.
Large quantities of orbiting silicon monoxide gas were also detected,
created when much of the rock was vaporized. In addition, the
astronomers found rocky rubble that was probably flung out from the
planetary wreck.
The mass of the dust and gas observed suggests the combined mass of the
two charging bodies was more than twice that of our moon.
Their speed must have been tremendous as well -- the two bodies would
have to have been traveling at a velocity relative to each other of at
least 10 kilometers per second (about 22,400 miles per hour) before the
collision.
Spitzer has witnessed the dusty aftermath of large asteroidal impacts
before, but did not find evidence for the same type of violence --
melted and vaporized rock sprayed everywhere. Instead, large amounts of
dust, gravel, and boulder-sized rubble were observed, indicating the
collisions might have been slower-paced. "Almost all large impacts are
like stately, slow-moving Titanic-versus-the-iceberg collisions, whereas
this one must have been a huge fiery blast, over in the blink of an eye
and full of fury," said Lisse.
Other authors include C.H. Chen of the Space Telescope Science
Institute, Baltimore, Md.; M.C. Wyatt of the University of Cambridge,
England; A. Morlok of the Open University, London, England; I. Song of
The University of Georgia, Athens, Ga.; and P. Sheehan of the University
of Rochester, N.Y.
JPL manages the Spitzer mission for NASA's Science Mission Directorate,
Washington. Science operations are conducted at the Spitzer Science
Center at the California Institute of Technology in Pasadena. Caltech
manages JPL for NASA. Spitzer's infrared spectrograph, which made the
observations in 2004 before the telescope began its "warm" mission, was
built by Cornell University, Ithaca, N.Y. Its development was led by Jim
Houck of Cornell.
For more information about Spitzer, visit
http://www.spitzer.caltech.edu/spitzer and http://www.nasa.gov/spitzer
<http://www.spitzer.caltech.edu/spitzer > . More information about NASA's
planet-finding program is at http://planetquest.jpl.nasa.gov
<http://planetquest.jpl.nasa.gov/ >
Whitney Clavin 818-354-4673
Jet Propulsion Laboratory, Pasadena, Calif.
whitney.clavin@jpl.nasa.gov
2009-119
Jet Propulsion Laboratory
August 10, 2009
http://www.jpl.nasa.gov/news/news.cfm?release=2009-119
PASADENA, Calif. -- NASA's Spitzer Space Telescope has found evidence of
a high-speed collision between two burgeoning planets around a young star.
Astronomers say that two rocky bodies, one as least as big as our moon
and the other at least as big as Mercury, slammed into each other within
the last few thousand years or so -- not long ago by cosmic standards.
The impact destroyed the smaller body, vaporizing huge amounts of rock
and flinging massive plumes of hot lava into space. An artist's
animation of the event is at
http://www.nasa.gov/mission_pages/spitzer/multimedia/spitzer-20090810.html
.
Spitzer's infrared detectors were able to pick up the signatures of the
vaporized rock, along with pieces of refrozen lava, called tektites.
"This collision had to be huge and incredibly high-speed for rock to
have been vaporized and melted," said Carey M. Lisse of the Johns
Hopkins University Applied Physics Laboratory, Laurel, Md., lead author
of a new paper describing the findings in the Aug. 20 issue of the
Astrophysical Journal. "This is a really rare and short-lived event,
critical in the formation of Earth-like planets and moons. We're lucky
to have witnessed one not long after it happened."
Lisse and his colleagues say the cosmic crash is similar to the one that
formed our moon more than 4 billion years ago, when a body the size of
Mars rammed into Earth.
"The collision that formed our moon would have been tremendous, enough
to melt the surface of Earth," said co-author Geoff Bryden of NASA's Jet
Propulsion Laboratory, Pasadena, Calif. "Debris from the collision most
likely settled into a disk around Earth that eventually coalesced to
make the moon. This is about the same scale of impact we're seeing with
Spitzer -- we don't know if a moon will form or not, but we know a large
rocky body's surface was red hot, warped and melted."
Our solar system's early history is rich with similar tales of
destruction. Giant impacts are thought to have stripped Mercury of its
outer crust, tipped Uranus on its side and spun Venus backward, to name
a few examples. Such violence is a routine aspect of planet building.
Rocky planets form and grow in size by colliding and sticking together,
merging their cores and shedding some of their surfaces. Though things
have settled down in our solar system today, impacts still occur, as was
observed last month after a small space object crashed into Jupiter.
Lisse and his team observed a star called HD 172555, which is about 12
million years old and located about 100 light-years away in the far
southern constellation Pavo, or the Peacock (for comparison, our solar
system is 4.5 billion years old). The astronomers used an instrument on
Spitzer, called a spectrograph, to break apart the star's light and look
for fingerprints of chemicals, in what is called a spectrum. What they
found was very strange. "I had never seen anything like this before,"
said Lisse. "The spectrum was very unusual."
After careful analysis, the researchers identified lots of amorphous
silica, or essentially melted glass. Silica can be found on Earth in
obsidian rocks and tektites. Obsidian is black, shiny volcanic glass.
Tektites are hardened chunks of lava that are thought to form when
meteorites hit Earth.
Large quantities of orbiting silicon monoxide gas were also detected,
created when much of the rock was vaporized. In addition, the
astronomers found rocky rubble that was probably flung out from the
planetary wreck.
The mass of the dust and gas observed suggests the combined mass of the
two charging bodies was more than twice that of our moon.
Their speed must have been tremendous as well -- the two bodies would
have to have been traveling at a velocity relative to each other of at
least 10 kilometers per second (about 22,400 miles per hour) before the
collision.
Spitzer has witnessed the dusty aftermath of large asteroidal impacts
before, but did not find evidence for the same type of violence --
melted and vaporized rock sprayed everywhere. Instead, large amounts of
dust, gravel, and boulder-sized rubble were observed, indicating the
collisions might have been slower-paced. "Almost all large impacts are
like stately, slow-moving Titanic-versus-the-iceberg collisions, whereas
this one must have been a huge fiery blast, over in the blink of an eye
and full of fury," said Lisse.
Other authors include C.H. Chen of the Space Telescope Science
Institute, Baltimore, Md.; M.C. Wyatt of the University of Cambridge,
England; A. Morlok of the Open University, London, England; I. Song of
The University of Georgia, Athens, Ga.; and P. Sheehan of the University
of Rochester, N.Y.
JPL manages the Spitzer mission for NASA's Science Mission Directorate,
Washington. Science operations are conducted at the Spitzer Science
Center at the California Institute of Technology in Pasadena. Caltech
manages JPL for NASA. Spitzer's infrared spectrograph, which made the
observations in 2004 before the telescope began its "warm" mission, was
built by Cornell University, Ithaca, N.Y. Its development was led by Jim
Houck of Cornell.
For more information about Spitzer, visit
http://www.spitzer.caltech.edu/spitzer
<http://www.spitzer.caltech.edu/spitzer
planet-finding program is at http://planetquest.jpl.nasa.gov
<http://planetquest.jpl.nasa.gov/
Whitney Clavin 818-354-4673
Jet Propulsion Laboratory, Pasadena, Calif.
whitney.clavin@jpl.nasa.gov
2009-119
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