Exploding Asteroid Theory Gains Evidence: related news

Exploding Asteroid Theory Gains Evidence

About 13,000 years ago, woolly mammoths roamed the North American continent and the first known human society in that region, known as the Clovis civilization, lived there as well. But geologic and archeological evidence shows they both suddenly disappeared, and scientists have long debated the mystery of the mass extinction of both animals and humans about 12,900 years ago. At that time, climatic history suggests the Ice Age should have been drawing to a close, but instead rapid climate change initiated an additional 1,300 years of glacial conditions. But scientists couldn't agree on the cause of the sudden change in climate. However, about two years ago geophysicist Allen West proposed that an asteroid or comet exploded just above the earth’s surface at that time over modern-day Canada, sparking a massive shock wave and heat-generatin

Exploding Asteroid Theory Strengthened By New Evidence

Geological evidence found in Ohio and Indiana in recent weeks is strengthening the case to attribute what happened 12,900 years ago in North America - when the end of the last Ice Age unexpectedly turned into a phase of extinction for animals and humans - to a cataclysmic comet or asteroid explosion over top of Canada.

Exploding Asteroid Theory Strengthened by New Evidence Located in Ohio

Geological evidence found in Ohio and Indiana in recent weeks is strengthening the case to attribute what happened 12,900 years ago in North America -- when the end of the last Ice Age unexpectedly turned into a phase of extinction for animals and humans – to a cataclysmic comet or asteroid explosion over top of Canada.

Exploding Asteroid Theory Strengthened By New Evidence Located In Ohio, Indiana

Geological evidence found in Ohio and Indiana in recent weeks is strengthening the case to attribute what happened 12,900 years ago in North America -- when the end of the last Ice Age unexpectedly turned into a phase of extinction for animals and humans – to a cataclysmic comet or asteroid explosion over top of Canada.

Exploding Asteroid Theory Strengthened by New Evidence Located in Ohio, Indiana

Was the course of life on the planet altered 12,900 years ago by a giant comet exploding over Canada? New evidence found by UC Assistant Professor of Anthropology Ken Tankersley and colleagues suggests the answer is affirmative.

New Evidence Supports Exploding Asteroid

U.S. scientists say evidence found recently in Ohio and Indiana supports the theory of a giant object exploding 12,900 years ago over Canada.

New evidence supports exploding asteroid

CINCINNATI, July 7 (UPI) -- U.S. scientists say evidence found recently in Ohio and Indiana supports the theory of a giant object exploding 12,900 years ago over Canada.

Exploding asteroid theory strengthened by new clues

Was the course of life on the planet altered 12,900 years ago by a giant comet exploding over Canada? New evidence found by University of Cincinnati Assistant Professor of Anthropology Ken Tankersley and colleagues suggests the answer is affirmative.

More Evidence that Exploding Asteroid Caused Mass Extinction

Geological evidence found in Ohio and Indiana in recent weeks is strengthening the case to attribute what happened 12,900 years ago in North America -- when the end of the last Ice Age unexpectedly turned into a phase of extinction for animals and humans – to a cataclysmic comet or asteroid explosion over top of Canada.

Exploding asteroid theory strengthened by new evidence

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Exploding asteroid theory strengthened by new evidence located in Ohio, Indiana

As more data continues to be compiled, Tankersley, West and Schaffer will be publishing about this newest twist in the search to explain the history of our planet and its climate.

Exploding asteroid theory strengthened by new evidence located in Ohio, Indiana

Ken Tankersley seen working in the field in a cave in this publicity photo from the National Geographic Channel.

Gravity Tractor Could Deflect Asteroids

Hugh Pickens writes "A new study at the Jet Propulsion Labs shows that weak gravitational pull of a "gravity tractor" could deflect an Earth-threatening asteroid if it was deployed when the asteroid was at least one orbit away from potential impact with Earth. First a spacecraft would be crashed directly into the asteroid, similar to the Deep Impact mission that impacted a comet in 2005. This would provide a big change of direction, but in a less controllable fashion that could push the path of the asteroid into a dangerous keyhole. But then a second spacecraft, the gravity tractor, would come into play, hovering about 150 meters away from the asteroid, to exert a gentle gravitational force, changing the asteroid's velocity by only 0.22 microns per second each day.

Binary Asteroid Glides Past Earth

A rare event has given astronomers a great view of a binary asteroid system. Tonight, asteroid 2008 BT18 passed 1.4 million miles from Earth, shining like a 13th magnitude star. Before July 7th, astronomers believed 2008 BT18 was "just another" near-Earth asteroid, but then the Arecibo radio telescope obtained a "delay-Doppler" image of the asteroid and found it in fact had a binary partner. Although binaries are fairly common in the Solar System, this was a rare opportunity for a ground-based telescope to capture such a clear view…

European spacecraft set to swing by asteroid

An artist's impression of Steins asteroid, which the ESA's Rosetta probe will encounter Friday at a distance of 800 kilometres. The asteroid is about five kilometres across.An artist's impression of Steins asteroid, which the ESA's Rosetta probe will encounter Friday at a distance of 800 kilometres. The asteroid is about five kilometres across.

ESA spacecraft set for flyby of Steins asteroid

An European Space Agency image taken from the ESA's webside on Friday, Sept 5. 2008 shows an artist's impression of ESA’s Rosetta spacecraft flying by asteroid (2867) Steins on Sept. 5, 2008 at 20:58 CEST (1858 GMT), with a closest approach distance of 800 kilometers. Steins is Rosetta’s first nominal scientific target. The spacecraft encountered the asteroid in the course of its first incursion into the main asteroid belt located between the orbits of Mars and Jupiter, while on its way to Comet 67P/Churyumov-Gerasimenko, which is scheduled for 2014. An European Space Agency image taken from the ESA's webside on Friday, Sept 5. 2008 shows an artist's impression of ESA’s Rosetta spacecraft flying by asteroid (2867) Steins on Sept. 5, 2008 at 20:58 CEST (1858 GMT), with a closest approach distance of 800 kilometers.

Theory of Relativity Passes Another Test

Einstein's theory of General Relativity has been around for 93 years, and it just keeps hanging in there. With advances in technology has come the ability to put the theory under some scrutiny. Recently, taking advantage of a unique cosmic coincidence, as well as a pretty darn good telescope, astronomers looked at the strong gravity from a pair of superdense neutron stars and measured an effect predicted by General Relativity. The theory came through with flying colors.

Rosetta's trajectory towards asteroid Steins - Image

This diagram shows the approach of Rosetta’s spacecraft to asteroid (2867) Steins on 5 September 2008. Steins is located in the main asteroid belt between the orbits of Mars and Jupiter. The encounter took place during Rosetta’s first incursion into the main asteroid belt while on its way to Comet 67P/Churyumov-Gerasimenko.

Evidence of Massive Asteroid Impact on Mars?

The dramatic differences between the northern and southern hemispheres of Mars have puzzled scientists for 30 years. One of the proposed explanations -- a massive asteroid impact -- now has strong support from computer simulations carried out by two groups of researchers. Planetary scientists at the University of California, Santa Cruz, were involved in both studies.

Asteroid Apophis may hit the Earth in 2036 - astronomer

ST. PETERSBURG. June 30 (Interfax) - The asteroid Apophis may hit planet Earth in 2036, Director of the Russian Academy of Sciences' Applied Astronomy Institute Andrei Filkenstein told the media on Monday. "Apophis will reach the orbit of geostationary satellites in 2029. It may hit Earth later, as it makes a number of revolutions," he said. "It is highly probable that the asteroid will hit the Earth in 2036 if its trajectory passes through a 1.5-kilometer 'gate'," he said. There is no way to stave off this danger so far, but scientists have suggested a number of worthy ideas, the astronomer said. te md

Rosetta: rendezvous with an asteroid - Video

Asteroid Steins belongs to the rare, largely unknown intermediate E-class, very bright and probably with a much-weathered surface. Steins' orbit was only known from ground observations, so Rosetta is conducting Europe's first-ever optical tracking campaign, providing highly accurate position data to Flight Dynamics specialists who are planning a series of trajectory corrections for an accurate fly-by. For over a year, Rosetta scientists and leading asteroid experts have been planning this encounter, and all the probe's science instruments will be active at some point in the fly-by. Reception of the first images is expected at the European Space Operations Centre some two hours after the encounter on 5 September 2008.

Near Earth Asteroid Rendezvous (N.E.A.R) Shoemaker - Spacecraft, USA

The Near Earth Asteroid Rendezvous (NEAR) was designed to study the near Earth asteroid Eros from close orbit over a period of a year, and was successfully launched in February 1996.

Rosetta starts tracking asteroid Steins

Heading toward its first target-asteroid, (2867) Steins, ESA's Rosetta spacecraft has started using its cameras to visually track the asteroid and eventually determine its orbit with more accuracy.

Einstein's Theory Passes Strict New Test

FiReaNGeL writes with an excerpt from a story at e! Science News: "Taking advantage of a unique cosmic configuration, astronomers have measured an effect predicted by Albert Einstein's theory of General Relativity in the extremely strong gravity of a pair of superdense neutron stars. Essentially, the famed physicist's 93-year-old theory passed yet another test. Scientists at McGill University used the National Science Foundation's Robert C. Byrd Green Bank Telescope (GBT) to do a four-year study of a double-star system unlike any other known in the Universe. The system is a pair of neutron stars, both of which are seen as pulsars that emit lighthouse-like beams of radio waves."

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