With this picture, the alien is not the earth?

Date: 2020-10-26 Like: 64
In fact, in nearly half a century ago, astronomers design a map, it can point anywhere on Earth in the Milky Way, and that any technological civilization has the ability to intercept the spacecraft, enough to decipher the map, then the alien people are coming to find it?
With this figure, the non-aliens to Earth must be made?

Photography:. F FERRARO, EUROPEAN SOUTHERN OBSERVATORY

If the universe is the seat of mega-cities,

the earth is the city in a very small room -

so,

we planet house number written on small pieces of paper,

universe thrown into this city,

will be outsiders seek them do?

 With this FIG., the earth is not alien to the non

Photography: ROBERT SIMMON, NASA EARTH OBSERVATORY; REBECCA HALE, NGM STAF

Indeed,

early in nearly half a century ago,

astronomers design a map,

it can point anywhere on Earth in the Milky Way,

and has the ability to intercept any spacecraft technological civilization,

enough to decipher the map,

so the aliens coming to find it?

 With this FIG., the earth is not alien to the non

Photography: COURTESY FRANK DRAKE

you may feel incredible,

yet there are so few human beings on the planet,

initiative for space in the intelligent aliens "Beacon."

They draw the map,

cause the Earth in the next few billions of years of time,

are exposed to threat from the universe under it?

 With this FIG., the earth is not alien to the non

1972 years and 73 years, two astronomers in the decision, the map was engraved with "gold record", he has take the "Pioneer 10" and "Pioneer 11" starting with Saturn passing, now fly to other planets. Then in 1977, two "Voyager" space probes, is also equipped with azimuth guidance Earth maps into space.

 With this FIG., the earth is not alien to the non

"Pioneer 10" it is carrying information from human to interstellar space. This information is etched on a gold-plated aluminum plate 15 × 23 cm, to discover how to inform people find us.

Photography: ALAMY STOCK PHOTO

The two astronomers who?

Why "betrayal" of the human race?

In fact, so that was the universe astronomers to draw a map coordinates, pointing to a Milky Way will not be easy in the billions of stars. Because the galaxy is not clearly labeled, before finding the Earth to find the solar system, the sun very much, it can not be distinguished from the other galaxy in hundreds of billions of stars.

 With this FIG., the earth is not alien to the non

FIG source:. ZTF / D GOLDSTEIN AND R. HURT (CALTECH)

this is hundreds of billions of stars are each surrounded by a galaxy along its own track center operation, the relative position of its neighboring planet is slowly changing. This means that the relative displacement of stars in the near future, all over the Earth in the constellation of the sky will no longer be the same again.

ancient Egypt, Babylon, the ancient Chinese,

when all astronomical observations are aware,

Polaris point north.

Indeed,

After about two years,

Polaris will no longer representative of the North.

 With this FIG., the earth is not alien to the non

but even that failed to stop the astronomer Carl Sagan and Frank Drake drawing plans.

 With this FIG., the earth is not alien to the non

this photo was taken in 1972, Carl Sagan (left, holding his son Nick), Linda Salzman Sagan and Frank Drake designed the "pioneers 10 "and" Pioneer 11 "to be sent to interstellar space" gold record. "

Photography: COURTESY FRANK DRAKE

While the center of the normal stellar nuclear material in operation, but they may not be obvious feature, Frank found that pulsar - - the star of "body" - there may be the only that can be identified.

pulsar was discovered in 1967, after the collapse is still rotating stellar core. Their fast speed, often hundreds per week can be rotated, and the rotation of the star debris every one has left a unique imprint in space - Therefore, pulsars known as the "cosmic lighthouse "

 With this FIG., the earth is not alien to the non

crab synthetic FIG. The Crab Nebula is the remains of a super nova, and its core is the pulsar.

X-ray: NASA / CXC / ASU / J.Hester et al .; Optical: NASA / ESA / ASU / J.Hester & A.Loll; Infrared: NASA / JPL-Caltech / Univ. Minn./R.Gehrz

Frank selected 14 pulsars capable of triangulation the position of the earth , and their rotational speed is converted into encoded, recorded in the map upper, substantially forming a beautiful "asterisk", hatched in a position radially intersects the solar system.

The map indicating how to position it aliens? - Presumably, anything that can detect and capture keen starship quiet flight, their level of civilization should know pulsars; understanding of pulsars, the Milky Way will be able to read this from any corner of the earth to guide you - pulsar map.

pulsar map - the original map Frank Drake designed to use 14 pulsars act as a guide, point to Earth.

Photography: COURTESY FRANK DRAKE

each Earth shadow lines connected with the pulsar. hatch marks indicates a binary number pulsar rotation rate, the length of the hatching substantially proportional to the distance.

indicated on the map by the pulsar rotation period of the star signs in the sky matches, aliens can relatively easily find the way leading to the Earth.

(click the image to see the handwriting)

 With this figure, the non-aliens to Earth not a

in addition, since the energy from the pulsar's rotation can be seen therefrom, and their rotation rate over time It goes to slow down, so map in the fourth dimension also point to the Earth . By calculating the difference between the observed rotation period after encoding and - the difference in a few years will become apparent - alien and will know how long ago plotted on this map.

designed to map the way it either in space or time point to the Earth, the Milky Way has become a four-dimensional positioning system.

aliens map upgrade edition appeared

 With this figure, the non-aliens to Earth must be made?

(click the image to see the handwriting)

With this FIG Zhang, alien to the Earth is not a non

galactic positioning system - how much change by identifying these specific pulsar and its rotation, and will be able to find the location of the sun - and the earth nearby.

Half a century later,

Scott Ransom pulsar expert to design a new map,

in an unusual way,

Milky utilize the pulsar and outside the Earth navigation.

(click the image to see the handwriting)

 With this figure, the non-aliens to Earth not a

many stars similar to our sun and the galaxy. In order to help the alien find it, this new map provides two reference scale - a near and a far.

The new map is selected millisecond pulsars , its rotation is faster, there is a longer run on the track there are other dead partner. These binary pulsar provides another set of identification: the orbital period of the system billions of years will not change.

But the key is that the aging rate of millisecond pulsars is much slower than normal pulsars on the original map, which means that they have to spend thousands of times the previous number of stars that pulse of time, rotating it It will become unrecognizable.

 With this FIG., the earth is not alien to the non

signs stable - if a small size, and density of the pulsar another star form one pair, it will absorb energy and material the star of the already high the rotation speed becomes faster. When the pulsar speeds up to 43,000 revolutions per minute, the radiation will be presented in the form of pulses, play the role of the lighthouse.

In addition, Scott also introduces another set of signs: Run around the Milky Way - pulsar globular clusters. Globular clusters are ancient planet mission earlier than the Milky Way formed, it is a veritable millisecond pulsars "factory."

After the addition of external signs is hard to ignore these galactic clusters, galactic even stars in the galactic center has been rotated around the way round, the change in position of the constellation would cease to exist, but these signs can still point to Earth.

 With this FIG., the earth is not alien to the non

photo by GARTH ILLINGWORTH, UCSC / LO

do not worry!

Even if aliens found Pioneer 10,

They are also difficult to invade the earth with this map.

time in terms of the scope of the universe,

This original map will soon be obsolete.

 With this FIG., the earth is not alien to the non

because it uses markers - then only a few known pulsar's rotation slows down, and then will fade in a few million years, disappear, error of up to several thousand years.

Even these markers have not disappeared, sun and other neighboring stars around the galaxy rotation to a week 200,000,000 to 2.5 billion years. In this lengthy cycle, with the rotation of the Milky Way, the Sun and its reference - relative position of the pulsar has changed, this map marked out of the Earth's position, only suitable for relatively universe For very short period of time.

 With this FIG., the earth is not alien to the non

1973 pioneer 11 spacecraft year.

Figure Source: NASA

Moreover, it is equipped with the "Pioneer" or "Voyager" was intercepted Hopes are fading. Although all four detectors are on interplanetary trajectories, but the universe is too big, but also a few more years they will encounter next galaxy. In addition, these spacecraft are very small, when they completely stop sending signals in the next few decades, it was more difficult to detect.

So do not worry,

These maps did not imagine so useful.

As the beginning of this article,

Let's make inaccurate -

If the universe is the seat of mega-cities,

The earth is the city in a small room -

so,

we planet house number written on small pieces of paper,

Roll into a ball thrown into this universe in major cities,

will be outsiders seek them do?

Rest assured,

No one bird you.

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