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Wed, 21 Nov 2018
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Comets

Archaeology

Tree rings pinpoint eruption of Iceland's Katla volcano to half a century before human settlement

Katla volcano tree rings
An international group of researchers has dated a large volcanic eruption in Iceland to within a few months. The eruption, which is the oldest volcanic eruption to be precisely dated at high northern latitudes, occurred shortly before the first permanent human settlements were established, when parts of the now mostly treeless island were still covered with forest.

The team, which included volcanologists, climatologists, geographers and historians among others, used a combination of scientific and historical evidence to pinpoint the eruption date of the Katla volcano between late 822 CE and early 823 CE, decades before the earliest settlers arrived. Their results are reported in the journal Geology.

In a similar way to how fossils can be used to understand the development and evolution of life on Earth, different types of environmental evidence can be used to understand what the Earth's climate was like in the past and why. The 'fingerprints' contained in tree rings and ice cores help scientists to estimate past climatic conditions and extend our understanding of the interaction between humans and the environment hundreds and thousands of years back in time.

Fireball 2

Potential new meteor shower from Comet Borisov

Meteor Shower
© Scott MacNeill
Peter Jenniskens and Esko Lyytinen report that the dust trail of 700-year comet Borisov, who just passed perihelion in 2014, will be in the Earth's path on 2017 July 29 at 00:22 UT. Earth will pass only 0.0006 AU inside the comet's orbit at a time when the comet has just passed perihelion, both favorable circumstances for detecting meteors. Observers in South Africa will have a chance to see a glimpse of this new 1-2 hour duration meteor shower.

Fireball 4

Mystery solved: Wow! signal from 1977 was generated by a comet

Wow! Signal
© The Ohio State University Radio Observatory and the North American Astrophysical Observatory (NAAPO)
A team of researchers with the Center of Planetary Science (CPS) has finally solved the mystery of the "Wow!" signal from 1977. It was a comet, they report, one that that was unknown at the time of the signal discovery. Lead researcher Antonio Paris describes their theory and how the team proved it in a paper published in the Journal of the Washington Academy of Sciences.

Back in August of 1977, a team of astronomers studying radio transmissions from an observatory at Ohio State called the "Big Ear" recorded an unusual 72-second signal—it was so strong that team member Jerry Ehman scrawled "Wow!" next to the readout. Since that time, numerous scientists have searched for an explanation of the signal, but until now, no one could offer a valid argument. Possible sources such as asteroids, exo-planets, stars and even signals from Earth have all been ruled out. Some outside the science community even suggested that it was proof of aliens. It was noted that the frequency was transmitted at 1,420 MHz, though, which happens to be the same frequency as hydrogen.

Fireball

Possible meteorite impact in Jaipur, India

Possible Meteorite Impact
© TopYaps
The universe has its own peculiar ways to establish contact with the planet Earth. Although we have been quite lucky for the past hundreds of years that nothing as destructive as the extinction of dinosaurs has happened, however, every now and then, the cosmic bodies give us a visit in the form of meteorites.

Monday night turned into a nightmarish experience for the people of Mukundpura village when a mysterious object resembling a fireball fell on the farm of Banshi Bagha. Scared and skeptical of the object, people spent the night fearing an explosion. The area is situated on the outskirts of city of Jaipur.

Comet 2

New Comet: C/2017 K4 (ATLAS)

CBET nr. 4397, issued on 2017, June 01, announces the discovery of a comet (magnitude ~17) by the "Asteroid Terrestrial-impact Last Alert System" (ATLAS) Team on CCD exposures taken on May 26.5 with the ATLAS 0.5-m f/2.0 Schmidt telescope at Haleakala. The new comet has been designated C/2017 K4 (ATLAS).

I performed follow-up measurements of this object, while it was still on the neocp. Stacking of 10 unfiltered exposures, 120 seconds each, obtained remotely on 2017, May 29.4 from Q62 (iTelescope network) through 0.43-m f/6.8 reflector + CCD, shows that this object is a comet with a diffuse coma nearly 10 arcsec in diameter

My confirmation image (click on it for a bigger version)
C/2017 K4 (ATLAS)
© Remanzacco Blogspot

Fireball

Meteor fireball lights up southern English coast

A fireball brighter than the moon lit up the skies over Dawlish on Thursday night - and a video shows the spectacular ball of light plummeting down to earth.

An amazing video, shot by Dawlish Beach Cam, shows the fireball, otherwise known as a meteor, at 11.38pm. It is reported that over 50 members of the public reported seeing phenomenal light ball to the UK Meteor Network.

The operators of the Dawlish Beach Cam reported the sighting to the UK Meteor Network.

A spokesman from Dawlish Beach Cam said: "This particular type is known as a Bolide fireball which means that it is brighter than the moon.

"The team are still collating information on this particular event but they do have some other footage and the trajectory they believe the fireball took.

Fireball 4

Asteroids which could wipe out an entire continent are hidden by the Taurids meteor shower, astronomers claim

asteroid collision with Earth
The annual Taurids meteor shower is one of the highlights of the stargazing calendar. But the comet that causes this natural wonder could be hiding gigantic asteroids which are large enough to wipe out whole continents.

That's the warning from a team of academics at the Astronomical Institute of the Czech Academy of Science, who have been keeping a close eye on the Taurids.

Each year in late October and November, Earth's skies light up with shooting stars when the Earth passes through debris called the Taurids which is left behind by comet Encke.

However, the Czech astronomers claimed that asteroids called 2015 TX24 and 2005 UR are "direct members" of an undiscovered "branch" of the Taurids.

Fireball 2

Thunderbolts Space News: Electric meteors becoming accepted science

Thunderbolts Project
© YouTube/Thunderbolts Project (screen capture)
A new scientific study, published in the Geophysical Research Letters, argues that the sounds associated with some meteor sightings are the products of electrical activity. In this episode, we explore the significance of this breakthrough and elaborate the Electric Universe predictions and explanations for meteoritic phenomena.

Comment: For further information read Earth Changes and the Human Cosmic Connection by Pierre Lescaudron and Laura Knight-Jadczyk.


Meteor

Martian Sky 'Went Metal' After Meteor Strikes

 NASA's Mars Atmosphere and Volatile Evolution (MAVEN)
© Anil Rao

An artist's conception of NASA's Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft overlooking Mars as the planet is bombarded by meteors.
Metal detected in the sky of Mars may come from meteors streaking through the Red Planet atmosphere, a new study finds.

Interplanetary dust motes and chunks of rock often plunge at high speeds into the atmospheres of Earth and other worlds, blazing to form meteors as friction with air particles heats the objects. On Earth, the resulting smoke generates a persistent layer of metallic atoms in the atmosphere. However, until now, such layers were not directly seen elsewhere in the solar system.

These metal atoms can go on to influence their atmospheres: "After meteors burn up, their debris floats down through the atmosphere and can seed clouds," said study lead author Matteo Crismani, a planetary scientist at the University of Colorado Boulder. "This happens on Earth and probably on Mars too," he told Space.com. [Photos: NASA's MAVEN Mission to Mars]

Info

Taprobane - The Indian impact event you never heard of

Early Map
© Malaga Bay
This is the story of the biggest Indian Impact you've never heard of.

It's also a wet job that exposes the squishy grey matter of the mainstream mindset.

So don your rubber gloves.

And lock the door because this posting contains some very strong images that shouldn't be shared in polite company nor displayed within the confines of a complacent academic ivory tower.

Ready?