Download E-books The Eerie Silence: Are We Alone in the Universe? PDF

By Paul C. W. Davies

On April eight, 1960, a tender American astronomer, Frank Drake, became a radio telescope towards the megastar Tau Ceti and listened for numerous hours to work out if he may notice any man made radio indications. With this modest begin all started a global undertaking of doubtless momentous value. often called SETI - look for Extraterrestrial Intelligence - it really is an amalgam of technology, know-how, event, interest and a daring imaginative and prescient of humanity's future. Drake has acknowledged that SETI is known as a look for ourselves - who we're and what our position may be within the grand cosmic scheme of items. but with one tantalizing exception, SETI has produced merely damaging effects. After hundreds of thousands of hours spent eavesdropping at the cosmos astronomers have detected purely the eerie sound of silence. What does that suggest? Are we in truth on my own within the vastness of the universe? Is ET in the market, yet no longer sending any messages our approach? may possibly we be surrounded by means of messages we easily don't realize? Is SETI a waste of time and cash, or may still we press forward with new and extra delicate antennas? Or glance in other places? And if a sign have been to be bought, what then? How might we - or perhaps may still we - reply?

Show description

Read or Download The Eerie Silence: Are We Alone in the Universe? PDF

Similar Astronomy books

The Perfect Machine: Building the Palomar Telescope

Nearly a half-century after is crowning glory, the 200-inch Palomar telescope is still an unheard of blend of giant scale and microscope element. As large because the Pantheon of Rome and as heavy because the Statue of Liberty, this marvelous tool is so accurately outfitted that its seventeen-foot reflect used to be hand-polished to a tolerance of 2/1,000,000 of an inch.

The Stars of Heaven

Do some armchair house commute, rub elbows with alien existence kinds, and stretch your brain to the furthest corners of our uncharted universe. With this remarkable advisor publication, the celebs of Heaven, you needn't be an astronomer to discover the mysteries of stars and their profound which means for human life.

Nocturne: A Journey in Search of Moonlight

“Nobody who has no longer taken you may think the great thing about a stroll via Rome by means of complete moon,” wrote Goethe in 1787. unfortunately, the mind's eye is all now we have this present day: in Rome, as in some other sleek urban, moonlight has been banished, changed by means of the twenty-four-hour glow of streetlights in a global that by no means sleeps.

New Worlds, New Horizons in Astronomy and Astrophysics

Pushed via discoveries, and enabled by way of leaps in expertise and mind's eye, our figuring out of the universe has replaced dramatically throughout the process the previous couple of many years. The fields of astronomy and astrophysics are making new connections to physics, chemistry, biology, and laptop technological know-how. according to a wide and accomplished survey of clinical possibilities, infrastructure, and association in a countrywide and overseas context, New Worlds, New Horizons in Astronomy and Astrophysics outlines a plan for floor- and area- established astronomy and astrophysics for the last decade of the 2010's.

Extra resources for The Eerie Silence: Are We Alone in the Universe?

Show sample text content

Pioneer 10 used to be the 1st artifical item to depart the sunlight approach, so NASA idea it'd be a pleasant, albeit futile, gesture to exhibit a message to extraterrestrial beings. As a symbolic act, it's a nice inspiration, and i'm proud to own a duplicate. My pork isn't with the gesture itself, however the content material. The plaque used to be designed by way of Carl Sagan, Linda Salzman Sagan and Frank Drake, and exhibits an image of a female and male shape, one with a hand raised in greeting, including a picture of the spacecraft and a few technical information. A line symbolizes the trajectory of the spacecraft displaying it originating at the 3rd planet from the solar. Our galactic coordinates are encoded in a smart manner, by way of displaying the destinations and frequencies of a suite of pulsars, from which the sun’s place within the galaxy may be reconstructed by way of a far off civilization utilizing hassle-free geometry. This plaque could be valueless so far as signalling the extraterrestrial beings is worried, however it speaks volumes approximately people. a quick message to an unknown alien neighborhood may still possibly replicate the issues that we think of most vital approximately ourselves. the image is ruled via the human shapes, but our actual shape is among the least major factor we will say. it truly is nearly thoroughly inappropriate either scientifically and culturally. to place it bluntly, who provides a rattling what we glance like? five The raised hand half is the peak of absurdity: this sort of culturally particular mannerism will be completely incomprehensible to a different species, specially person who would possibly not have limbs. exhibiting the provenance of the spacecraft in the sun process is of little relevance. If the sun’s place is demonstrated, it wouldn’t take a genius to determine which planet had clever existence. The plaque additionally conveys the knowledge that people are carbon-based. yet we infrequently have to train ET chemistry and biology. Carbon is without doubt one of the merely life-giving aspect, but when the extraterrestrial beings quite desired to recognize, they can scour the spacecraft for remnants of terrestrial microbes. Thirdly, and extra heavily, a preoccupation with what we're made up of is nearly as parochial as crisis over our actual shape. absolutely the essence of humanity is what we do and imagine, now not the chemical makeup of bodies. 6 Fig. thirteen. Pioneer plaque. This half-hearted try to placed our stamp at the cosmic neighborhood is certain in its narrow-mindedness and preoccupation with twentieth-century technological know-how and human affairs. in truth, it addresses this sort of issues that seem at the time table of SETI meetings, yet are highly not going to be at the agendas of meetings in a 10-million-year-old alien civilization, specifically one during which machines/computers are doing the highbrow heavy lifting. As calling playing cards they're successfully lifeless. good, am i able to get a hold of something greater? i am hoping so. a technique to strategy the subject is to visualize that our species is set to be annihilated, and we want to go away a list of our erstwhile lifestyles, might be for a destiny clever species which could evolve in the world within the fullness of time.

Rated 4.24 of 5 – based on 48 votes

About the Author

admin