A look at meteorite impacts as a threat to civilization

Half of the world's wetlands were lost last century. Logging and conversion have shrunk the world's forests by as much as half.

A look at meteorite impacts as a threat to civilization

Dubold shut off the rockets, while Mansell leaped to the telescope. Dubold narrowed the detector beam to a tiny spear of electron stream, and turned to the screen. The feed-back of that narrowed beam would detect a tiny mass a thousand miles out in space through the disturbance of its flowing electrons and locate it in space as accurately as if sighted by a gun.

At the intersection of the cross-bar lines a tiny shadow showed like a blot of ink in its intensity. Yet Mansell could see nothing. Mansell changed the course of the ship slightly and the clangor ceased. Dubold shifted the needle beam a bit and located the mass again.

A lightning calculation by Mansell told them that the mass was at least fifteen hundred miles ahead.

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Its detection informed them that the mass was large enough to be seen with the naked eye. Mansell and Dubold looked at each other doubtfully, but Shafton was not watching them. Instead, he had his eyes glued to the gravitator as if he could not believe what he saw.

However, we are out of its path A flicker of alarm crossed his sharp-cut features as his attention riveted upon the young spaceman's face. For Shafton's eyes were staring aghast into the gravitator's dial.

There must be something wrong. So sensitive were the spacemen's sensations to gravitational pulls out there in almost weightless space, a slight but decided tug toward the prow could be felt.

A look at meteorite impacts as a threat to civilization

Again the commander scanned the surrounding space. Thrilling Wonder Stories April The mass ahead tripped the gravity detectors. They had to drop below the speed of light, so that their search beams could guard them from collision.

And that strange cloud grew. There was nothing we could see with the tele-periscopes, but the gravity detectors betrayed an invisible object of fifty thousand tons, approaching behind us—as if it had followed us from Neptune.

The deflector fields wouldn't swing it an inch. Larry Cho is at a research facility on Pluto, where they have a gravitational generator in the form of a giant ring around the moon Charon. Aliens are invading the solar system using advanced gravidic technology.

Larry has to reconfigure the generator into a gravity telescope.Significant Energy E vents in Earth's and Life's History as of Energy Event. Timeframe. Significance. Nuclear fusion begins in the Sun. c. billion years ago (“bya”) Provides the power for all of Earth's geophysical, geochemical, and ecological systems, with .

Since civilization originated during a period of stable climate, a natural variation into a new climate regime (colder or hotter) could pose a threat to civilization.

In the history of the Earth, many ice ages are known to have occurred. Countless impacts continue to shape Earth, other planets and moons in our dynamic Solar System.

February 12, , a.m.: A woodsman stacking logs in the frozen forest of eastern Siberia stopped working when he noticed a sudden flash of light, brighter than the Sun, streaking across the sky.

The two main functions of sensors are navigational and tactical. Navigational sensors are used by the astrogator to determine the spacecraft's current position, vector, and heading. They are also used by the pilot to perform the maneuvers calculated by the astrogator. A Meteorite is a piece of rock from outer space that strikes the surface of the Earth.

A Meteoroid is a meteorite before it hits the surface of the Earth. Meteors are glowing fragments of rock matter from outside the Earth's atmosphere that burn and glow upon entering the Earth's atmosphere.

Here is an article that presents some food for thought for those who are having trouble with the core claim in the Billy Meier case, i.e. that he is meeting with, and getting information from, the extraterrestrial Plejaren human beings.. Please remember that we can't be spoon fed everything.

This information is provided in order to help out some of the overly educated, under-thinking "experts.

Global catastrophic risk - Wikipedia