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Tue, 19 Nov 2019
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Comets

Sherlock

Comets hold life chemistry clues

The idea that comets delivered the chemical "seeds" for life to the early Earth has been given a big boost.

Scientists studying the tiny grains of material recovered from Comet Wild-2 by Nasa's Stardust mission have found large, complex carbon-rich molecules.

They are of the type that could have been important precursor components of the initial reactions that gave rise to the planet's biochemistry.

The first full analysis of the Wild-2 grains is reported in Science magazine.

Star

Meteor shower could be sign of comet that could come dangerously close to earth

Jarmo Moilanen, a municipal computer expert and amateur astronomer in the Finnish community of Vaala, has detected a new shower of meteors in the tale of a hitherto unknown comet.

Moilanen's two monitoring cameras that he keeps pointed at the sky and linked to his computer, registered an unexpected meteor shower already in October last year.

Meteor

Sunset 'comet' reported across western victoria

RESIDENTS in central and western Victoria have reported seeing a bright light, possibly a comet, streaking across the sky just before sunset.

Callers to ABC Radio reported seeing the bright green coloured object shooting westward in the sky from Bendigo to Horsham in the state's northwest down to Colac in the southwest.

Better Earth

Columbia University Research Finds Correlation Between Meteorite and Comet Impacts and an Increase in Volcanic Activity Development

Major Episodes of Extraterrestrial Impacts Found to Correlate with 9 Major Episodes of Volcanism

Supporting the theory that catastrophic events significantly influence major Earth processes, researchers have determined that comet and meteorite impacts on Earth occurring over the last 4 billion years have directly correlated with the activity of strong and normal mantle plumes - heated mantle rock causing volcanic eruptions (e.g. Hawaii, Iceland).

Meteor

Wow! Striking Green Comet Suddenly Visible in Evening Sky

What had been a modest comet seen only with binoculars or telescopes flared up this week to become visible to the naked eye.

Comment: Comment: Original story has pic.


Meteor

New Comet Discovered by David Levy

Renowned comet hunter David Levy discovered Comet C/2006 T1 on Monday, marking his twenty-second find. Soon after hosting his live web broadcast on Slooh.com, Levy turned his telescope towards Saturn and was astonished to find the unexpected object close by the ringed planet. The International Astronomical Union confirmed his discovery Tuesday.

Star

Scientists Admit Tunguska Meteorite Was A Comet

Tunguska cosmic body (TCB) was a comet, containing organic matter, says Russian scientist, the fellow of Troitsk Institute of Innovative and Thermonuclear Research.

Meteor

Mars probe may have struck 'dark comet'

With flawless precision, Mariner 4 dipped less than 10,000 km above the planet's surface and took 22 pictures. Mars was covered with desert sand and ancient craters. No cities. No canals. No Martians. No one would ever look at the red planet the same way again.

Most histories of the mission end right there, with Mariner 4 buzzing Mars - "the first spacecraft to visit the red planet" - and throwing cold water on a lot of good science fiction. But there's more to the story. After the flyby, something strange happened to Mariner 4, setting the stage for a 40-year mystery.

Star

Errant comet or meteor could ruin our plans

If you are tired of thinking about global warming, terrorist attacks or contracting a deadly new virus, maybe you could get out of your rut by mulling over the possibility that some large celestial body may be on a collision course with our planet.

Last month, the asteroid 2004 XP14 passed some 268,873 miles (432,000 kilometers) from Earth. That distance is slightly greater than that between the Earth and the moon.

Astronomers called it "a close shave in the vastness of outer space."

Question

Red rain caused by disintegration of comet: study

The "red rains" in Kerala five years ago was the result of the atmospheric disintegration of a comet, according to a study.

The study conducted at the School of Pure and Applied Physics of the MG University here by Dr Godfrey Louis and his student Santosh Kumar shows that red rain cells were devoid of DNA which suggests their extra-terrestrial origin.