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Celebrating Sagan
A living memorial to the life and work of Carl Sagan
A living memorial to the life and work of Carl Sagan

Celebrating Sagan's posts

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#CarlSagan  encourages humans to take responsibility for their actions, not only in day-to-day life, but also in regards to our impact on the planet... 
Carl Sagan — The absence of evidence is not the evidence of absence
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Stop by the Sounds of Sagan at to hear many of the original audio recordings that #CarlSagan  and #AnnDruyan  prepared for the Voyager Golden Record -
The NASA Voyager Golden Record Cover
A montage of sights and sounds etched into a phonograph record—a 12-inch gold-plated copper disk—launched into space on NASA's Voyager probes in 1977 for their interstellar journeys. The discs carry photos of the Earth and its lifeforms, a range of scientific information, spoken greetings from the people (e.g. the Secretary-General of the United Nations and the President of the United States, and the children of the Planet Earth) and a medley, "Sounds of Earth", that includes the sounds of whales, a baby crying, waves breaking on a shore, and a collection of music, including works by Mozart, Blind Willie Johnson, Chuck Berry's "Johnny B. Goode", Valya Balkanska and other Eastern and Western classics and performers worldwide.

Sounds of Earth:
Greetings to the Universe in 55 Different Languages:
Music From Earth:
Scenes From Earth:

The information in the upper right-hand portion of the cover is designed to show how pictures are to be constructed from the recorded signals. The top drawing shows the typical signal that occurs at the start of a picture. The picture is made from this signal, which traces the picture as a series of vertical lines, similar to analog television (in which the picture is a series of horizontal lines). Picture lines 1, 2 and 3 are noted in binary numbers, and the duration of one of the "picture lines," about 8 milliseconds, is noted. The drawing immediately below shows how these lines are to be drawn vertically, with staggered "interlace" to give the correct picture rendition. Immediately below this is a drawing of an entire picture raster, showing that there are 512 vertical lines in a complete picture. Immediately below this is a replica of the first picture on the record to permit the recipients to verify that they are decoding the signals correctly. A circle was used in this picture to ensure that the recipients use the correct ratio of horizontal to vertical height in picture reconstruction. Color images were represented by three images in sequence, one each for red, green, and blue components of the image. A color image of the spectrum of the sun was included for calibration purposes.

The drawing in the lower left-hand corner of the cover is the pulsar map previously sent as part of the plaques on NASA's Pioneer 10 and 11 spacecraft. It shows the location of the solar system with respect to 14 pulsars, whose precise periods are given. The drawing containing two circles in the lower right-hand corner is a drawing of the hydrogen atom in its two lowest states, with a connecting line and digit 1 to indicate that the time interval associated with the transition from one state to the other is to be used as the fundamental time scale, both for the time given on the cover and in the decoded pictures.

The record is constructed of gold-plated copper. The record's cover is aluminum and electroplated upon it is an ultra-pure sample of the isotope uranium-238. Uranium-238 has a half-life of 4.468 billion years. It is possible (e.g. via mass-spectrometry) that a civilization that encounters the record will be able to use the ratio of remaining uranium to daughter elements to determine the age of the record.

The records also had the inscription "To the makers of music – all worlds, all times" hand-etched on its surface. The inscription was located in the "takeout grooves", an area of the record between the label and playable surface. Since this was not in the original specifications, the record was initially rejected, to be replaced with a blank disc. Sagan later convinced the administrator to include the record as is.

The collection of images includes many photographs and diagrams both in black and white and color. The first images are of scientific interest, showing mathematical and physical quantities, the Solar System and its planets, DNA, and human anatomy and reproduction. Care was taken to include not only pictures of humanity, but also some of animals, insects, plants and landscapes.

Images of humanity depict a broad range of cultures. These images show food, architecture, and humans in portraits as well as going about their day-to-day lives. Many pictures are annotated with one or more indications of scales of time, size, or mass. Some images contain indications of chemical composition. All measures used on the pictures are defined in the first few images using physical references that are likely to be consistent anywhere in the universe.

The Voyager spacecraft are not heading towards any particular star, but Voyager 1 will be within 1.6 light-years of the star Gliese 445, currently in the constellation Camelopardalis, in about 40,000 years.

As the probes are extremely small compared to the vastness of interstellar space, the probability of a space-faring civilization encountering them is very small, especially since the probes will eventually stop emitting electromagnetic radiation meant for communication.

Carl Sagan noted that "The spacecraft will be encountered and the record played only if there are advanced space-faring civilizations in interstellar space. But the launching of this 'bottle' into the cosmic 'ocean' says something very hopeful about life on this planet." Thus the record is best seen as a time capsule or a symbolic statement more than a serious attempt to communicate with extraterrestrial life.
The content of the records were selected for NASA by a committee chaired by Carl Sagan of Cornell University, et. al. Dr. Sagan and his associates assembled 115 images and a variety of natural sounds, such as those made by surf, wind and thunder, birds, whales, and other animals. To this they added musical selections from different cultures and eras, and spoken greetings from Earth-people in fifty-five languages, and printed messages from U.S. President Carter and U.N. Secretary General Waldheim.

Each record is encased in a protective aluminum jacket, together with a cartridge and a needle. Instructions, in symbolic language, explain the origin of the spacecraft and indicate how the record is to be played. The 115 images are encoded in analog form. The remainder of the record is in audio, designed to be played at 16-2/3 revolutions per minute. It contains the spoken greetings, beginning with Akkadian, which was spoken in Sumer about six thousand years ago, and ending with Wu, a modern Chinese dialect. Following the section on the sounds of Earth, there is an eclectic 90-minute selection of music, including both Eastern and Western classics and a variety of ethnic music.

18,999,016,746+ KM
127.00058268 AU
19,073,308,066+ KM
127.49718948 AU

15,635,615,556+ KM
104.51763440 AU
15,641,404,063+ KM
104.55632818 AU

Credit: NASA-JPL, Wikipedia

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#NASA #Voyager #Space #Earth #CarlSagan #AnnDruyan #GoldenRecord #Sounds #Music #Scenes #Humanity #Culture #JPL #Cosmos #Universe

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A favorite scene from the original #Cosmos  stretched from 40 seconds to almost 5 minutes... with the original #Vangelis  score!

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In case you missed it, just relaunched with a new responsive look that works great on screens of all sizes. 

That means we are also accepting submissions for new memories and fan art celebrating the life and work of #CarlSagan.  

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So... the newly redesigned* just launched. Check back over the coming week for a bunch of new content and features.

*Celebrating the life and work of Dr. #CarlSagan  since 2006.

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Uh, awkward...
Astrophysicist Neil deGrasse and physicist Brian Cox are both well known for their brain muscle but who would win in a #scifight?

Neil thinks Brian would "warp space time" in a fight.

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Well stated.
Coolest dude to ever walk the Earth!

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A message that continues to ring true, especially as the UN's #IPCC released findings that show human impacts on global climate systems will continue to the planet a less hospitable place.
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