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).
Comets
What had been a modest comet seen only with binoculars or telescopes flared up this week to become visible to the naked eye.
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.
Tunguska cosmic body (TCB) was a comet, containing organic matter, says Russian scientist, the fellow of Troitsk Institute of Innovative and Thermonuclear Research.
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.
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.
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."
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."
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.
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.
DUGWAY PROVING GROUNDS, UT (AP) - After a seven-year journey, a NASA space capsule returned safely to Earth in January 2006 with the first dust ever fetched from a comet, a cosmic bounty that scientists hope will yield clues to how the solar system formed.
The capsule's blazing plunge through the atmosphere lit up parts of the western sky as it capped a mission in which the Stardust spacecraft swooped past a comet known as Wild 2.
"This is not the finish line. This is just the intermediate pit stop," said project manager Tom Duxbury of the Jet Propulsion Laboratory in Pasadena, CA, which managed the $212 million mission.
The capsule's blazing plunge through the atmosphere lit up parts of the western sky as it capped a mission in which the Stardust spacecraft swooped past a comet known as Wild 2.
"This is not the finish line. This is just the intermediate pit stop," said project manager Tom Duxbury of the Jet Propulsion Laboratory in Pasadena, CA, which managed the $212 million mission.
An unidentified green object streaked across the Queensland sky last night, before landing on a property between Toowoomba and Warwick near the Great Dividing Range.
Farmer Don Vernon lives on the property next to where the object hit the ground, and watched it come in to land.
"I was finished on the farm and driving home, and as I came in the gate I faced this enormous green ball of light with a white centre.
Farmer Don Vernon lives on the property next to where the object hit the ground, and watched it come in to land.
"I was finished on the farm and driving home, and as I came in the gate I faced this enormous green ball of light with a white centre.
Pasadena CA - NASA said Thursday there is no danger that Comet 73P/Schwassmann-Wachmann 3 - or any of its many fragments - will strike Earth during its closest approach next month. To provide further reassurances, the agency has employed the Hubble Space Telescope to take high-resolution images of the approaching object, and will soon follow suit with Spitzer to observe the fragments in infrared light.
"We are very well acquainted with the trajectory of Comet 73P Schwassmann-Wachmann 3," said Don Yeomans, manager of the agency's Near-Earth Object Program, at Jet Propulsion Laboratory. "There is absolutely no danger to people on the ground or the inhabitants of the International Space Station, as the main body of the object and any pieces from the breakup will pass many millions of miles beyond the Earth."
"We are very well acquainted with the trajectory of Comet 73P Schwassmann-Wachmann 3," said Don Yeomans, manager of the agency's Near-Earth Object Program, at Jet Propulsion Laboratory. "There is absolutely no danger to people on the ground or the inhabitants of the International Space Station, as the main body of the object and any pieces from the breakup will pass many millions of miles beyond the Earth."
Comment: None of this hoopla has happened before when a comet when sailing by the planet. NASA just stated it wasn't a threat, and that was that. If they are so confident that none of the 73P fragments will hit, why are they scrambling all their resources this time "to provide further reassurances"??
Comment: Comment: Original story has pic.