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Living On Tatooine

Living On Tatooine | SCIENCE NEWS | Scoop.it
In science fiction we love seeing exotic worlds. One of the most famous is Luke Skywalker's home planet of Tatooine, a desert world with two suns. While it makes for great science fiction, is it…
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22/7: ημέρα προσέγγισης του αριθμού π

22/7: ημέρα προσέγγισης του αριθμού π | SCIENCE NEWS | Scoop.it
Ενώ η 14η Μαρτίου (3/14) έχει καθιερωθεί ως η παγκόσμια ημέρα του αριθμού π, η 22η Ιουλίου (22/7) θεωρείται ως η παγκόσμια ημέρα προσέγγισης του αριθμού π. Ο λόγος 22/7 χρησιμοποιήθηκε ως προσέγγιση του αριθμού π για πρώτη φορά από τον Αρχιμήδη. https://youtu.be/3CqReRK6KgQ
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SETI in vivo: testing the we-are-them hypothesis

Maxim A. Makukov, Vladimir I. shCherbak
(Submitted on 11 Jul 2017)
After it was proposed that life on Earth might descend from seeding by an earlier civilization, some authors noted that this alternative offers a testable aspect: the seeds could be supplied with a signature that might be found in extant organisms. In particular, it was suggested that the optimal location for such an artifact is the genetic code, as the least evolving part of cells. However, as the mainstream view goes, this scenario is too speculative and cannot be meaningfully tested because encoding/decoding a signature within the genetic code is ill-defined, so any retrieval attempt is doomed to guesswork. Here we refresh the seeded-Earth hypothesis and discuss the motivation for inserting a signature. We then show that "biological SETI" involves even weaker assumptions than traditional SETI and admits a well-defined methodological framework. After assessing the possibility in terms of molecular and evolutionary biology, we formalize the approach and, adopting the guideline of SETI that encoding/decoding should follow from first principles and be convention-free, develop a retrieval strategy. Applied to the canonical code, it reveals a nontrivial precision structure of interlocked systematic attributes. To assess this result in view of the initial assumption, we perform statistical, comparison, interdependence, and semiotic analyses. Statistical analysis reveals no causal connection to evolutionary models of the code, interdependence analysis precludes overinterpretation, and comparison analysis shows that known code variations lack any precision-logic structures, in agreement with these variations being post-seeding deviations from the canonical code. Finally, semiotic analysis shows that not only the found attributes are consistent with the initial assumption, but that they make perfect sense from SETI perspective, as they maintain some of the most universal codes of culture.
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New View of Cold Atoms Flowing

New View of Cold Atoms Flowing | SCIENCE NEWS | Scoop.it
A new technique produces an image of the flow of cold atoms through a channel, a potentially important tool for future cold-atom technology.
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Saturn-Shaped Drops

Saturn-Shaped Drops | SCIENCE NEWS | Scoop.it
An electric field can pull apart a millimeter-sized oil drop, causing it to shed thin rings from its equator that then break up into tiny droplets.
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Ο πιο μοναχικός άνθρωπος στο Σύμπαν

Ο πιο μοναχικός άνθρωπος στο Σύμπαν | SCIENCE NEWS | Scoop.it
Πάνε 48 χρόνια από την πρώτη προσσελήνωση. Ήταν 20 Ιουλίου όταν η σεληνάκατος στην οποία επέβαιναν ο Νιλ Αρμστρονγκ και ο Μπαζ Ολντριν ακούμπησε στην επιφάνεια του φεγγαριού. Στην επόμενη τριετία, ακόμα δέκα συνάδελφοί τους θα έκαναν τη βόλτα τους στον αφιλόξενο δορυφόρο της Γης, πριν η ΝASA διακόψει απότομα το πρόγραμμα «Απόλλο» κατόπιν κυβερνητικής…
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Αστρονόμοι εντόπισαν παράξενα «εξωγήινα» σήματα

Αστρονόμοι εντόπισαν παράξενα «εξωγήινα» σήματα | SCIENCE NEWS | Scoop.it
Εντοπίστηκαν παράξενα ραδιοφωνικά σήματα που μάλλον προέρχονται από την γειτονιά ενός κοντινού άστρου – αλλά μην ελπίζετε πως τα στέλνουν εξωγήινοι. Στις 12 Μαΐου, το ραδιοτηλεσκόπιο Αρεσίμπο στο Πουέρτο Ρίκο ανίχνευσε κάποια πολύ περίεργα σήματα προερχόμενα από το άστρο Ross 128, έναν ερυθρό νάνο που απέχει μόλις 11 έτη φωτός από την Γη. Σύμφωνα με…
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Experiment finds evidence for the Majorana fermion, a particle that's its own antiparticle

Experiment finds evidence for the Majorana fermion, a particle that's its own antiparticle | SCIENCE NEWS | Scoop.it
In 1928, physicist Paul Dirac made the stunning prediction that every fundamental particle in the universe has an antiparticle - its identical twin but with opposite charge. When particle and antiparticle met they would b
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Σφάλμα δορυφόρου έκρυβε την άνοδο της στάθμης των ωκεανών

Σφάλμα δορυφόρου έκρυβε την άνοδο της στάθμης των ωκεανών | SCIENCE NEWS | Scoop.it
Για πολλά χρόνια οι κλιματολόγοι έξυναν το κεφάλι τους με απορία: πώς γίνεται να παραμένει σταθερός ο ρυθμός ανόδου της στάθμης των ωκεανών, την ώρ
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An Experiment in Zurich Brings Us Nearer to a Black Hole’s Mysteries

An Experiment in Zurich Brings Us Nearer to a Black Hole’s Mysteries | SCIENCE NEWS | Scoop.it
IBM researchers used an exotic material known as a Weyl semimetal to confirm the existence of a gravitational anomaly predicted in equations that describe the universe.
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Astronomers discover Earth-sized exoplanet with very short orbital period

Astronomers discover Earth-sized exoplanet with very short orbital period | SCIENCE NEWS | Scoop.it
(Phys.org)—An international team of astronomers has detected a new Earth-sized exoplanet in an ultra-short period around its parent star. The alien world, designated EPIC 228813918 b, circles its host every four hours an
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Congressman completely wastes NASA's time by asking about aliens

Congressman completely wastes NASA's time by asking about aliens | SCIENCE NEWS | Scoop.it
Congressman Dana Rohrabacher asked a NASA scientist if there's evidence that an alien civilization populated Mars years ago.
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Astronomers Detect Strange Signals from Red Dwarf Star

Astronomers Detect Strange Signals from Red Dwarf Star | SCIENCE NEWS | Scoop.it
The radio bursts are tantalizing, but probably not transmissions from talkative aliens
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Συνεργασία ανθρώπων - έξυπνων μηχανών

Συνεργασία ανθρώπων - έξυπνων μηχανών | SCIENCE NEWS | Scoop.it
Οι έξυπνες μηχανές δεν είναι απειλή για την ανθρωπότητα, υποστηρίζουν οι οπαδοί της τεχνολογίας AI (Artificial Intelligence), σε αντίθεση με πλήθος άλλων που έχουν αντίθετη άποψη.
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Scientists get best measure of star-forming material in early galaxy clusters

The international Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) collaboration based at the University of California, Riverside has combined observations from several of the world’s most powerful telescopes, including W. M. Keck Observatory on Maunakea, Hawaii, to carry out one of the largest studies yet of molecular gas — the raw material which fuels star formation throughout the universe — in three of the most distant clusters of galaxies ever found, detected as they appeared when the Universe was only four billion years old.

Allison Noble, a postdoctoral researcher at the Massachusetts Institute of Technology, led this newest research from the SpARCS collaboration.
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The great polar mystery: closing in on the truth

The great polar mystery: closing in on the truth | SCIENCE NEWS | Scoop.it
What happened when all 129 men in John Franklin’s Arctic expedition vanished in the late 1840s? We’re finally putting the pieces together
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Η Δίκη των Πιθήκων

Η Δίκη των Πιθήκων | SCIENCE NEWS | Scoop.it
Μία από τις δέκα πιο σημαντικές δίκες στη νομική ιστορία των Ηνωμένων Πολιτειών. Εντάσσεται στο πλαίσιο της διαμάχης μεταξύ «δημιουργιστών» και «δαρβινιστών».
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«Κάνουμε ένα ταξίδι στο νανόκοσμο». Μια συνέντευξη με το Νομπελίστα William E. Moerner

«Κάνουμε ένα ταξίδι στο νανόκοσμο». Μια συνέντευξη με το Νομπελίστα William E. Moerner | SCIENCE NEWS | Scoop.it
Της Βάσως Μιχοπούλου Γενιές και γενιές φοιτητών της Φυσικής μάθαιναν μέχρι πρότινος ότι το όριο ανάλυσης των οπτικών μικροσκοπίων είναι περίπου το μισό μήκος κύματος του πράσινου φωτός, περίπου 200 νανόμετρα. Ο Γερμανός φυσικός Ernst Abbe είχε περιγράψει αυτό το όριο περίθλασης ήδη από το 1873 (Abbe diffraction limit). Αλλά ο William E. Moerner από…
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Μια αστεία φάτσα αιωρείται στον Διαστημικό Σταθμό

Μια αστεία φάτσα αιωρείται στον Διαστημικό Σταθμό | SCIENCE NEWS | Scoop.it
Πρόκειται για την Internal Ball Camera η οποία αιωρείται εξαιτίας των συνθηκών έλλειψης βαρύτητας και φωτογραφίζει-βιντεοσκοπεί τις εργασίες των αστροναυτών, ενώ ο χειρισμός της γίνεται από τη Γη. Τις πρώτες φωτογραφίες που τράβηξε ένα drone το οποίο βρίσκεται στον Διεθνή Διαστημικό Σταθμό (ISS) δημοσιοποίησε η διαστημική υπηρεσία της Ιαπωνίας. Το drone, με την ονομασία Internal…
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Spiral arms allow school children to weigh black holes

The Royal Astronomical Society, encourages and promotes the study of astronomy, solar-system science, geophysics and closely related branches of science. The RAS organizes scientific meetings in Burlington House, its London HQ, and throughout the country, publishes international research and review journals, recognizes outstanding achievements by the award of medals and prizes, maintains an extensive library, supports education through grants and outreach activities and represents UK astronomy nationally and internationally.
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Seeing Scrambled Spins

Seeing Scrambled Spins | SCIENCE NEWS | Scoop.it
Two experimental groups have taken a step towards observing the “scrambling” of information that occurs as a many-body quantum system thermalizes.  
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Jocelyn Bell Burnell wins President's Medal of the Institute of Physics

The astrophysicist Jocelyn Bell Burnell has been awarded the President's Medal of the Institute of Physics (IOP) "for her outstanding contributions to physics through pioneering research in astronomy, most notably the discovery of the first pulsars, and through her unparalleled record of leadership within the community". The award, which is given at the discretion of the IOP president, was presented yesterday in Birmingham at the International Conference on Women in Physics.
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Quantum simulator with 51 qubits is largest ever

Quantum simulator with 51 qubits is largest ever | SCIENCE NEWS | Scoop.it
A team in the US has created a simulator with 51 quantum bits – the largest of its kind so far. Mikhail Lukin at Harvard University announced the achievement on 14 July at the International Conference on Quantum Technologies in Moscow.

Quantum simulators are used to model the minute behaviour of molecules, and could help study how drugs act within the human body. They aren’t full-blown quantum computers, though, says Simon Devitt at Macquarie University in Sydney.

Lukin’s system was specifically built to solve one equation that models the interactions between certain atoms. If you wanted to solve a different equation, you’d have to rebuild the system from scratch.
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Give robots an 'ethical black box' to track and explain decisions, say scientists

Give robots an 'ethical black box' to track and explain decisions, say scientists | SCIENCE NEWS | Scoop.it
As robots start to enter public spaces and work alongside humans, the need for safety measures has become more pressing, argue academics
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Ireson Hill on Mars

A different astronomy and space science
related image is featured each day, along with a brief explanation.
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The cosmic dance of three dead stars could break relativity

The cosmic dance of three dead stars could break relativity | SCIENCE NEWS | Scoop.it
Do we have the first hints that Einstein is about to be proven wrong? A stellar system discovered in 2012 looks like the ideal experiment to tell us
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