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Showing posts with label space exploration. Show all posts

Wednesday, March 7, 2012 ~ Have your say...

The Cosmic Connection: Will we ever know if we're alone?

An interesting idea presented by Carl Sagan when pondering the likelyhood of discovering intelligent life outside of our planet:

"We are like the inhabitants of an isolated valley in New Guinea who communicate with societies in neighboring valleys (quite different societies, I might add) by runner and by drum. When asked how a very advanced society will communicate, they might guess by an extremely rapid runner or by an improbably large drum. They might not guess a technology beyond their ken. And yet, all the while, a vast international cable and radio traffic passes over them, around them, and through them... 


We will listen for the interstellar drums, but we will miss the interstellar cables. We are likely to receive our first messages from the drummers of the neighboring galactic valleys - from civilizations only somewhat in our future. The civilizations vastly more advanced than we, will be, for a long time, remote both in distance and in accessibility. At a future time of vigorous interstellar radio traffic, the very advanced civilizations may be, for us, still insubstantial legends."


- Carl Sagan, "The Cosmic Connection"

Do you think SETI (the search for extraterrestrial intelligence) will find evidence for intelligent life "out there"?  Leave your comment below.

Monday, November 7, 2011 ~ Have your say...

Breaking News: White House Formally Acknowledges: "Searching for ET, but no aliens yet".

Ok, it's not really breaking news.  It's kinda mundane.  But, it's interesting nonetheless.  


The White House has formally acknowledged that the human race is not engaging extraterrestrials and is not withholding any information from said aliens.  This was in response to two petitions on the White House's "We The People" site, which requires a response from the government if 25,000 signatures are signed.  The first petition stated the following:


We petition the obama administration to "formally acknowledge an extraterrestrial presence engaging the human race - Disclosure."


"We, the undersigned, strongly urge the President of the United States to formally acknowledge an extraterrestrial presence engaging the human race and immediately release into the public domain all files from all agencies and military services relevant to this phenomenon."
___


Hundreds of military and government agency witnesses have come forward with testimony confirming this extraterrestrial presence. Opinion polls now indicate more than 50% of the American people believe there is an extraterrestrial presence and more than 80% believe the government is not telling the truth about this phenomenon. The people have a right to know. The people can handle the truth.


The second petition reads:


We petition the obama administration to "Immediately disclose the government's knowledge of and communications with extraterrestrial beings"


This Petition calls for the President to disclose to the American people the long withheld knowledge of government interactions with extraterrestrial beings and call for open Congressional hearings to allow the people to become aware of this subject through those whose voices have been silenced by unconstitutional secrecy oaths.


The Response...


Phil Larson, who works on space policy and communications at the White House Office of Science and Technology Policy, replied with this official statement:


Searching for ET, But No Evidence Yet


By Phil Larson


"Thank you for signing the petition asking the Obama Administration to acknowledge an extraterrestrial presence here on Earth.


The U.S. government has no evidence that any life exists outside our planet, or that an extraterrestrial presence has contacted or engaged any member of the human race. In addition, there is no credible information to suggest that any evidence is being hidden from the public's eye.


However, that doesn't mean the subject of life outside our planet isn't being discussed or explored. In fact, there are a number of projects working toward the goal of understanding if life can or does exist off Earth. Here are a few examples:


SETI—the Search for ExtraTerrestrial Intelligence—was originally stood up with help from NASA, but has since been moved to other sources of private funding. SETI's main purpose is to act as a giant ear on behalf of the human race, pointing an array of ground-based telescopes towards space to listen for any signal from another world.


Kepler is a NASA spacecraft in orbit that's main goal is to search for Earth-like planets. Such a planet would be located in the "Goldilocks" zone of a distant solar system—not too hot and not too cold—and could potentially be habitable by life as we know it. The Kepler mission is specifically designed to survey our region of the Milky Way galaxy to discover Earth-sized, rocky planets in or near the habitable zone of the star (sun) they orbit.


The Mars Science Laboratory, Curiosity, is an automobile-sized rover that NASA is launching soon. The rover's onboard laboratory will study rocks, soils, and other geology in an effort to detect the chemical building blocks of life (e.g., forms of carbon) on Mars and will assess what the Martian environment was like in the past to see if it could have harbored life.


A last point: Many scientists and mathematicians have looked with a statistical mindset at the question of whether life likely exists beyond Earth and have come to the conclusion that the odds are pretty high that somewhere among the trillions and trillions of stars in the universe there is a planet other than ours that is home to life.


Many have also noted, however, that the odds of us making contact with any of them—especially any intelligent ones—are extremely small, given the distances involved.


But that's all statistics and speculation. The fact is we have no credible evidence of extraterrestrial presence here on Earth."


The official petitions can be found here and here:


Do you think this case is settled?  Or is the government lying to us again....???

Monday, October 10, 2011 ~ Have your say...

Seeing the Earth from space during a solar eclipse

What would the Earth look like from space during a solar eclipse?  I wondered the same, and came across two incredible images.  Note that the moon's shadow darkens only a part of Earth during a solar eclipse.  People underneath the center of the dark spot (the umbra) will see the total eclipse; while others on the edge (the penumbra) will see a partial eclipse. This shot was taken from the Mir space station in August 1999 and is courtesy the Centre National d'Etudes Spatiales.
The image below is from the Japanese geostationary satellite (MTSAT) and shows the view of Earth at 9:30 a.m. local time in Taiwan, near the time in eastern China when the disk of the Moon completely overlapped the disk of the Sun. (source Wikimedia Commons).

Mr. Eclipse provides a great infographic which explains the geometry behind a solar eclipse, including the umbra and penumbra described above.

Sunday, September 18, 2011 ~ Have your say...

Flying Over Planet Earth: as seen from the ISS (video)

Below is a an incredible time-lapse taken from the front of the International Space Station as it orbits our planet Earth at night. 

According to the creator, on his YouTube channel, "this movie begins over the Pacific Ocean and continues over North and South America before entering daylight near Antarctica. Visible cities, countries and landmarks include (in order) Vancouver Island, Victoria, Vancouver, Seattle, Portland, San Fransisco, Los Angeles. Phoenix. Multiple cities in Texas, New Mexico and Mexico. Mexico City, the Gulf of Mexico, the Yucatan Peninsula, Lightning in the Pacific Ocean, Guatemala, Panama, Columbia, Ecuador, Peru, Chile, and the Amazon. 

Also visible is the earths ionosphere (thin yellow line) and the stars of our galaxy. Raw data was downloaded from The Gateway To Astronaut Photography of Earth "http://eol.jsc.nasa.gov/sseop/mrf.htm "."

Friday, September 16, 2011 ~ Have your say...

A Video of Vesta Rotating in Space

The Dawn team over at NASA has published a simulated flyby of Vesta produced from a topographic model. The model is based on imaging performed during August 2011, when Dawn was in high-altitude mapping orbit. 

At the time, Vesta's north pole was in winter darkness, so the shape model does not quite reach into the northern polar regions. 

The animated gif (upper left) does not do this video justice - watch the high def video below to see the unprecendented level of photographic accuracy we now have available to look from the comfort of our own homes... while this giant rock is barelling through space.  Pretty amazing.




Embedded video from

NASA Jet Propulsion Laboratory California Institute of Technology

References:
Credit: NASA / JPL / UCLA / MPS / DLR / IDA

Monday, August 15, 2011 ~ Have your say...

The Moon Landing Hoax Debunked (again)










To The Moon!

American President Barack Obama’s presented to the National Academy of Sciences on April 27th, 2009.  Here is a excerpt from his speech:

“When the Soviet Union launched Sputnik a little more than a half century ago, Americans were stunned: the Russians had beaten us to space. We had a choice to make: we could accept defeat – or we could accept the challenge. And as always, we chose to accept the challenge.

President Eisenhower signed legislation to create NASA and to invest in science and math education, from grade school to graduate school. And just a few years later, a month after his address to the 1961 Annual Meeting of the National Academy of Sciences, President 

Kennedy boldly declared before a joint session of Congress that the United States would send a man to the moon and return him safely to the earth.

The scientific community rallied behind this goal and set about achieving it. And it would lead not just to those first steps on the moon, but also to giant leaps in our understanding here at home.”

One Small Step

It was on July 20th, 1969, that Apollo 11 commander Neil Armstrong stepped out of the lunar module and took the first small step on the lunar surface, but a giant leap for mankind.  NASA beamed back audio, video, and images from the historic mission.  Ask most people from that era, “Where were you when we first walked on the moon?”, and they can remember the day as if it was yesterday.  It was completely memorable, and not only a historic moment for the United States of America, but for science and all of humanity.

NASA launched six missions that would go on to land on the moon;  Apollos 11, 12, 14, 15, 16.  They studied things like soil mechanics, meteoroids, seismic measurements, heat flow, lunar ranging, magnetic fields and the solar wind.  It was the ultimate laboratory, and we learned much from those trips.  

The Conspiracy

But what if the United States didn’t land on the moon?  What if there was a conspiracy to give the illusion that they did?  What if the public was fooled into thinking that ‘1969 America’ could win the space race?  And if the government lied, what else were they lying about?  What else do they not want us to know?  What if… the moon landing was a hoax?

In February of 2001, Fox TV aired a program called “Conspiracy Theory:  Did We Land on the Moon?”.  It featured interviews with a group of people who believe that NASA faked the Apollo moon landings.  The biggest proponent of this idea was Bill Kaysing, who claimed to have evidence for the hoax:  images, engineering details, anomalies in the physics, and astronaut testimonies.  According to Kaysing, NASA did not have the technical capability of landing on the moon, but since there was so much pressure during the Cold War and space race with the Soviet Union, the USA was forced to fake the whole thing to prove that they had technological superiority.  To Kaysing and others believer in the conspiracy, it was easier to fool the public with an elaborate hoax (assumed to be filmed in Area 51, of course) rather than let their Cold War rival strike a huge moral victory by having a non-American step foot on the moon first.

Scan the Internet for “Moon Landing Hoax”, and (other than this site), you’ll find other reasons for the conspiracy, including the following, from MoonMovie.com:

"Why would Apollo fake the first manned moon mission (Apollo 8) and then continue to go back 8 more times? To answer this question, one must understand both history and the future. 

Technology is far beyond what the public is allowed to know - in some cases 35 years ahead of public knowledge.

The elite handlers of the Military Industrial Complex (MIC) needed a long term distraction from the real space program, for the purposes of covertly building the vast control mechanisms and placing them in Earth orbit.

Bart Sibrel touches on this in his first film, when he includes the real reason for space presence - military domination of the Earth from space. This is the history. Another resource for this documented movement towards worldwide tyranny is Arsenal of Hypocrisy. NASA is a multifaceted tool of the MIC, and the Global Elite who plan to implement world government. 

Apollo was in fact, a great distraction."

And so, putting the reason for the hoax aside, let us investigate why some people believe man has yet to step foot on the moon.  At the same time, we’ll put on our skeptical hats and let science debunk each of the claims.

Claims for the Conspiracy… and the Facts That Debunk Them

According to moon hoax believers, the list below provides “evidence” for the fact that the moon landing was staged in a studio.  (Editors note:  For the sake of brevity, I have chosen eleven.  If you wish to find more “evidence” and counter evidence (science), please read through the reference material at the bottom of the article.  The most comprehensive guide I have yet to find is on Phil Plait’s Bad Astronomy site).

1  When the astronauts plant the flag, you can see it flapping as though it’s in a breeze.  But there is no air or atmosphere on the moon… so how could this be?

The flag is moving because the astronauts just placed it there, and by twisting and turning the flag pole, they caused it to move.  The inertia from when they let go kept it moving,  Over time, the flag would come to rest, but the video was taken during and shortly after it was placed into the lunar surface.

2  Buzz Aldrin is seen in the shadow of the lander, but at the same time, he is clearly visible. Many shadows look strange in the Apollo pictures. Some shadows don't appear to be parallel with each other, and some objects in shadow appear well lit, hinting that light was coming from multiple sources… just like studio cameras.

There were multiple light sources:  the sun, the Earth's reflected light, light reflecting off the lunar module, the spacesuits, and also the lunar surface.

It's also important to note that the lunar surface is not flat.  If an object is in a dip (say, a small crater), you will get a different shadow compared to an object next to it that is on a level surface.  Still not convinced?  This is easily testable at with a few small props, uneven ground, and a light source.

In addition, the shadows are not parallel in the images due to perspective.  You are looking at a three-dimensional scene, projected on a two-dimensional photograph, which causes distortions. When the Sun is low and shadows are long, objects at different distance do indeed appear to cast non-parallel shadows, even here on Earth. Here’s a great example demonstrating this effect – non parallel shadows distorted by perspective. Again, this is easily testable, as the previous link demonstrates.

3  You’re on the moon and there’s no atmosphere.  So you should be able to clearly see all the stars in the sky.  But where are they?  They don’t show up in any of the photographs – it’s just a dark sky.

The moon's surface reflects sunlight, and its glare would have made stars difficult to see. Also, the astronauts photographed their lunar adventures using fast exposure settings, which would have limited incoming background light. According to Bad Astronomy, they were taking pictures at 1/150th or 1/250th of a second.  With such a short exposure, the stars simply won’t show up on film.  You can try this for yourself.  Take a picture of Jupiter or Venus (since they are highly visible from Earth) on a clear night away from light pollution.  You’ll have a hard time seeing them, if at all, and you certainly won’t see even the brightest stars.  You need a long and steady exposure for that to work.

4  The lander was huge and should have produced a giant crater when it touched the surface.  But the module is shown sitting on relatively flat, undisturbed soil.

"Science fiction movies depict this big jet of fire coming out as [spacecraft] land, but that's not how they did it on the moon.".  In reality, the lander's engines were throttled back prior to landing, and it did not hover long enough to form a crater or disturb much dust.
5  The radiation in the van Allen Belts and in deep space would have killed the astronauts in minutes.

Kaysing's exact words, when quoted on this claim, were, ``Any human being traveling through the van Allen belt would have been rendered either extremely ill or actually killed by the radiation within a short time thereof.''

The van Allen belts are regions above the Earth's surface where the Earth's magnetic field has trapped particles of the solar wind. An unprotected human would get a lethal dose of radiation, but only if he stayed there long enough. But according to Phil Plait, the spaceship traveled through the belts very quickly, getting through them in about an hour. There wasn't enough time to get a lethal dose.  Additionally, the metal hull of the spaceship blocked most of the radiation.

6  The pictures taken from the Moon were exposed and set.  Just about every picture the public sees is near perfect, with the scene always centered perfectly. However, the cameras were mounted on the front of the astronauts' spacesuit, and there was no finder. They couldn't have taken perfect pictures every time!

Nobody claims they did. Thousands of pictures were taken on the Moon, and the ones we all see will tend to be the best ones. If Buzz Aldrin accidentally took a picture with Neil Armstrong partly out of the frame, you probably won't see that image in a magazine.

Further to that, Phil Plait notes that everything done on the Moon was practiced endlessly by the astronauts. Those working on the mission knew that these pictures would be some of the most important images ever taken, so they would have taken particular care in making sure the astronauts could do it with their eyes shut. When fabled astronaut Story Musgrave replaced a camera on board the Hubble Space Telescope in 1993, someone commented that he made it look easy. "Sure," he replied, "I had practiced it thousands of times!"

7  The astronauts' footprints are too clear for being made on a dry surface. Those footprints could only have been made in wet sand.

Plait, an astronomer and skeptic, deals with this claim nicely:  Moon dust, or regolith, is "like a finely ground powder. When you look at it under a microscope, it almost looks like volcanic ash. So when you step on it, it can compress very easily into the shape of a boot." And those shapes could stay pristine for a long while thanks to the airless vacuum on the moon.

8  We are led to believe that only two astronauts walked on the moon at a time, yet in photographs such as the one below, where both are visible, there is no sign of a camera. So who took the picture?

According to Phil Plait, the cameras were mounted to the astronauts' chests.  In the picture above, Plait notes, "you can see [Neil's] arms are sort of at his chest. That's where the camera is. He wasn't holding it up to his visor."

9  There are many strange reflections in the photos.  They could only have come from studio lights on a production set.

If NASA spent millions of dollars on a hoax, do you think they would make such an obvious mistake?  The reflections are lens flares.  The pentagonal flare seen in some photos is of the aperture of the camera. 


10  After the “landing”, artifacts from the trip were supposedly left behind:  part of the Eagle, the U.S. flag, and several other instruments and mementos.  With instruments like the Hubble Space Telescope capable of peering into the distant of the universe, surely scientists should be able to see the various objects still on the moon. But no such pictures of these objects exist.

There isn’t a single telescope on Earth or in space that has a resolution powerful enough to see these objects. In fact, astronomers can calculate this:  given the biggest telescope on Earth, the smallest thing you can see on the surface of moon is something bigger than a house.

11 There’s secret outtake footage from the old Moontruth website that shows a bumble when they were staging the landing.  You can clearly see it was a production set.

That’s because it was a production set.  You can watch it yourself:



Moontruth.com eventually came out as a parody, publishing a disclaimer stating that the clip was a fake. This doesn't stop people from believing that it still supports the hoax, however. In fact, in true conspiracy theorist fashion, the admission that it was a fake video is seen as “part of the conspiracy”, or “what they want you to think”.

From NASA, With Love

After the show on Fox aired, NASA felt compelled to respond.  On their web page, they present the most compelling piece of evidence as proof of the moon landings.  Actually, they present 841 pounds of evidence in the form of moon rock.  Moon rocks are absolutely unique, and there’s no process on Earth that could simulate their creation.  That is, they can only be created on the moon itself.  To learn how they differ from Earth rocks, and how their creation is different, visit NASA’s rebuttal on their site.

Dr. David McKay, Chief Scientist for Planetary Science and Exploration at NASA's Johnson Space Center (JSC) is quoted:  "I have here in my office a 10-foot high stack of scientific books full of papers about the Apollo Moon rocks.  Researchers in thousands of labs have examined Apollo Moon samples -- not a single paper challenges their origin! And these aren't all NASA employees, either. We've loaned samples to scientists in dozens of countries [who have no reason to cooperate in any hoax]."

Even Dr. Robert Park, Director of the Washington office of the American Physical Society and a noted critic of NASA's human space flight program, agrees that humans have indeed landed on the moon. He was quoted by NASA in saying, "The body of physical evidence that humans did walk on the Moon is simply overwhelming."

Conclusion 

Conspiracy theories like the Moon Landing Hoax can be debunked, torn apart, shredded, and thoroughly disproved with hard science every day, but that usually won’t make a difference to true believers.  The Mythbusters, a television show on the Discovery network, dedicated an episode to the Moon Landing Hoax and tackled several parts of the myth.  Like me, the cast members held no illusions that they would be able to sway the diehard moon hoax believer to the “other side”.

"The thing that I've found over the years is that there is always a certain segment of people out there who will refuse to believe despite overwhelming evidence. Those diehards will never be convinced, while everyone else will have fun watching us take on the hoax," said cast member Imahara.

Savage and Hyneman said they found similarities between the hoax and the other myths they have tested.  "There seems to be a common tendency among conspiracy theorists, as well as among a lot of people with entrenched belief systems, to get stuck on an idea and never give up. 

Conspiracy theories are not really a special category -- maybe you can call them myths, but I look at them as an obsession that people want to maintain, like being abducted by aliens, Bigfoot and so on. You can't really expect that reasonable evidence will change anyone's mind if they are determined," observed Hyneman.

And so, we fight the good fight with science, reason, and rationality – chipping away at conspiracy theories like the Moon Landing Hoax with the hope that at least some hoax believers, when presented with the evidence, will let go of their belief and choose to accept the facts.




References:

Interview with Bill Kaysing:  (Editors note:  I left out Kaysing's claim that NASA murdered three astronauts via the Apollo 1 fire because they were afraid the hoax would be exposed.  You can read more about this accusation in the interview, and on Phil Plait's Bad Astronomy article).
NASA’s response:
The ultimate debunk of the Moon Landing Hoax:
Images:
Other:




Monday, July 18, 2011 ~ Have your say...

NASA's Dawn Spacecraft: An Infographic

On Saturday, NASA’s Dawn spacecraft arrived at the 330 mile wide asteroid, Vesta. It’s the first space probe to orbit a protoplanet in the asteroid belt.


Dawn will conduct a year-long study of Vesta where NASA hopes to gain an understanding of the origins and earliest conditions of the solar system. The research will also help determine why Vesta is the brightest asteroid in the solar system.


NASA chief, Charles Bolden said, “Dawn’s study of the asteroid Vesta marks a major scientific accomplishment and also points the way to the future destinations where people will travel in the coming years. President Obama has directed NASA to send astronauts to an asteroid by 2025, and Dawn is gathering crucial data that will inform that mission.”


Dawn will then visit the dwarf planet Ceres (arriving in 2015).


Here’s an infographic detailing Dawn’s mission:




Image Credit:   Space.com:  http://www.space.com/12279-nasa-dawn-asteroid-mission-works-infographic.html

Thursday, July 7, 2011 ~ Have your say...

First iPhones in Space: Final Shuttle Astronauts to Deliver $1 App

This news item, courtesy of Mashable, got my attention because it is oh-so-very-cool.  "The final, much-delayed mission of Space Shuttle Atlantis, which has a 30% chance of lifting off this Friday, will be carrying with it the planet’s first astro-phones — a pair of Apple iPhone 4s, ready for a first-of-its-kind experiment aboard the International Space Station, using a $1 app.


The app, SpaceLab for iOS, uses the iPhone 4′s in-built three-axis gyroscope to replace far more expensive custom-built equipment. It will measure altitude, the curvature of the Earth, and locate itself by looking for recognizable coastline via the iPhone camera. (Astronauts aboard the ISS will be taking the snapshots...)"


From the iTunes description... "The primary purpose of these experiments is to collect data for future flights, to improve the sensor accuracy and precision, and to demonstrate some of the basic capabilities intrinsic to iPhone but uniquely applied to the Low Earth Orbit (LEO) space environment."


Once the experiment and iPhones are returned to Earth and analyzed, it will be made available to users as part of a new release."


You can pick up the app here.  Remarkable, I still haven't jumped on to the iPhone bandwagon... I have to resort to my second generation iPod Touch.

Tuesday, May 24, 2011 ~ Have your say...

Shuttle Endeavor Photographed While Docked to the ISS

The Endeavor shuttle is on its last mission for the NASA space program – a sad moment for astronomers and space enthusiasts. But on this final mission, Endeavor has made a first in space history: it’s the first shuttle to be photographed from another space vehicle while docked to the International Space Station (ISS). The photo (below) was taken from the Soyuz TMA-20 spacecraft, 600 meters from the ISS as the crew backed off.

One can only imagine the complexities of docking a space shuttle to a space station without error.  In the photo, you can see the shuttle tilted backwards, docked to the left of the ISS.


In 1995, shuttle Atlantis was photographed while docked to the Russian Mir Space Station, resulting in one of the most iconic images ever taken during the space program (below). 


I look forward to the future of the space program, as we enter into the private realm over the next few years. 

 Image credit: NASA, Roscosmos, NASA TV

Monday, March 7, 2011 ~ Have your say...

The Arecibo Message: Communicating With Alien Civilizations


In 1974, the Arecibo Radio Telescope beamed a powerful broadcast targeting the globular star cluster M13. Containing roughly 330,000 stars, and at a distance of 21,000 light years from Earth, the blast would be strong enough to be detected by an alien M13 civilization’s own version of SETI.

Dubbed “The Arecibo Message”, it was sent pictorially as a set of 1,679 bits, arranged into 73 rows with 23 characters per row, which are both deliberately prime numbers (the intent being that aliens could use these prime numbers to help decode the message).  The bits were transmitted by frequency-shifting at the rate of 10 bits per second, and the total broadcast was just under 3 minutes.

The message contained:
  • The numbers one through ten;
  • The atomic numbers of the elements hydrogen, carbon, nitrogen, oxygen, and phosphorus (which collectively make up DNA)
  • The formulas for the sugars and bases in the nucleotides of DNA
  • The number of nucleotides in DNA, and graphic of the double helix structure of DNA
  • A graphic figure of a human, along with the average height, and the population of Earth
  • A graphic of the Solar System
  • A graphic of the Arecibo radio telescope, along with its dimensions

The message will take approximately 21,000 years to be received, and then 21,000 years to be returned back to Earth – so the probability of “contact” or “communication” is extremely low.  However, as a thought experiment, it is interesting to think how an alien civilization may attempt to decode Earth’s message.  On the Arecibo Wikipedia article, an explanation is given for each section in the pictorial.

For the message to be decoded, a number of assumptions must be made:
  • The alien civilization will need to understand binary format of counting, or Base-2.
  • “Chemistry”, as a whole, will be the same across the Universe.  However, the building blocks of life might not.  In the message, we assume 1) that the aliens will be able to decode the elements and formulae for the makings of DNA and its nucleotides, and 2) that life elsewhere in the Universe is made from the same organic building blocks
  • The depiction of Humanity, while immediately obvious to humans, may be completely foreign to an alien civilization.  What if it’s normal for them to have 8 arms and 4 legs?  
  • Without the use of language, it is incredibly difficult to assume that our solar system could be interpreted as a “solar system”.  Especially now, with the declassification of Pluto as a planet – who knows how others might define celestial bodies?
  • The orientation of the message is critical for its understanding… if an attempt is made to interpret it as 23 rows by 73 columns, then the intended meaning is lost...
There’s no easy way to send a message into space that guarantees a high probability that it will be decoded correctly.  Of course, having Wikipedia explain each row and column helps, but the aliens will certainly not have that luxury.  Any form of media sent into space will degrade over time, and the aliens will probably not have VCRs, CD drives, DVD, BluRay, or Flash drives…

So, a radio message makes the most sense… however, I fear that, even if the Arecibo Message is received, it will remain encoded, hiding its mystery, must like many of the ancient texts from civilizations that are no longer here on Earth.


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