Do Events Inside Black Holes Happen? | Space Time | PBS Digital Studios

    

Do Events Inside Black Holes Happen? | Space Time | PBS Digital Studios

Δημοσιεύτηκε στις 19 Αυγ 2015

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Black
holes! From Stephen Hawking to Interstellar, black holes are mammoths
in the world of science AND sci-fi. But what exactly IS a black hole?
Do events happen inside black holes? Are black holes really a hole? Are
black holes really black?! Join Gabe on this week’s episode of PBS Space
Time as he debunks popular black hole misconceptions, and rethinks what
the term, ‘black hole’, even means. Thought you knew what a black hole
was? Think again!

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Supermassive Black Hole at the Center of the Galaxy

    



 Supermassive Black Hole at the Center of the Galaxy



Δημοσιεύτηκε στις 27 Αυγ 2015

Feel
the pull of the largest object in our galaxy, a supermassive black
hole. Astronomers are discovering its properties by probing the objects
that are buzzing around it at mind-boggling speeds.

From a
distance, our galaxy would look like a flat spiral, some 100,000 light
years across, with pockets of gas, clouds of dust, and about 400 billion
stars rotating around the galaxys center. Thick dust and blinding
starlight have long obscured our vision into the mysterious inner
regions of the galactic center. And yet, the clues have been piling up,
that something important, something strange is going on in there.
Astronomers tracking stars in the center of the galaxy have found the
best proof to date that black holes exist. Now, they are shooting for
the first direct image of a black hole.

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ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 30/8/2015

Turning cancer back into healthy tissue

• 25 August 2015
• From the section Health

Scientists believe they may have found a way to turn cancerous cells back into healthy tissue.

Their lab-based work suggests there is a biological step that can restore normality and stop cells replicating out of control.
When the US researchers added molecules called microRNAs, it put the brakes on cancer, Nature Cell Biology reports.

Ultimate Bipolar Nebula

    

Ultimate Bipolar Nebula

Δημοσιεύτηκε στις 26 Αυγ 2015

From
Hubblecast. A new Hubble Space Telescope image shows off the Twin Jet
Nebula, highlighting the nebula’s shells and its knots of expanding gas
in striking detail. Two iridescent lobes of material stretch outwards
from a central star system. Within these lobes two huge jets of gas are
streaming from the star system at speeds in excess of one million
kilometres per hour.

The glowing and expanding shells of gas
clearly visible in this image represent the final stages of life for an
old star of low to intermediate mass. The star has not only ejected its
outer layers, but the exposed remnant core is now illuminating these
layers — resulting in a spectacular light show like the one seen here.

Ordinary
planetary nebulae have one star at their centre, bipolar nebulae have
two, in a binary star system. Astronomers have found that the two stars
in this pair each have around the same mass as the Sun, ranging from 0.6
to 1.0 solar masses for the smaller star, and from 1.0 to 1.4 solar
masses for its larger companion. The larger star is approaching the end
of its days and has already ejected its outer layers of gas into space,
whereas its partner is further evolved, and is a small white dwarf.

The
characteristic shape of the wings of the Twin Jet Nebula is most likely
caused by the motion of the two central stars around each other. It is
believed that a white dwarf orbits its partner star and thus the ejected
gas from the dying star is pulled into two lobes rather than expanding
as a uniform sphere. The nebula’s wings are still growing and, by
measuring their expansion, astronomers have calculated that the nebula
was created only 1200 years ago.

Within the wings, starting from
the star system and extending horizontally outwards like veins are two
faint blue patches. Although these may seem subtle in comparison to the
nebula’s rainbow colours, these are actually violent twin jets streaming
out into space, at speeds in excess of one million kilometers per hour.
These jets are slowly changing their orientation, precessing across the
lobes as they are pulled by the wayward gravity of the binary system.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 27/8/2015

Laser detects brain tumour cells during surgery

Surgeons in London have used lasers to diagnose abnormal tissue during an operation to remove a brain tumour for the first time in Europe.

The non-invasive technique measures light reflected off tissue to determine whether it is cancerous or healthy.
The patient, Reuben Hill, 22, is making a good recovery after the operation at Charing Cross Hospital.
It is hoped the technique could make this kind of delicate surgery faster and more accurate.
It has only been tried in Montreal, Canada, before now.
Mr Hill, who is from Devon and studying for a PhD in physics at Imperial College London, works with the same laser technology as used in his operation.
Before surgery, he told me: "My inner scientist is fascinated by what they are going to do.
"Understanding the physics involved definitely makes it less frightening."

---

How it works

Image caption The laser probe in action

During the operation, surgeons use a near-infrared laser probe, pointing the beam of light on to the exposed brain.
This causes molecules in the cells to vibrate.
Fibre optics in the probe collect the scattered light that bounces off the tissue.
This is analysed using Raman spectroscopy, which can measure the frequency of vibrations.
Healthy and abnormal tissue have a slightly different "signature".
The whole process takes a couple of seconds, and is entirely non-invasive.

Thousands of microbes found in house dust

By Rebecca Morelle Science Correspondent, BBC News

• 26 August 2015
• From the section Science & Environment

 

Image caption The house dust contained 2,000 types of fungi - including Aspergillus shown here

The dust in our homes contains an average of 9,000 different species of microbes, a study suggests.

Researchers from the University of Colorado at Boulder analysed the dust found in 1,200 households across the United States.
They discovered that the types of bacteria and fungi varied depending on where the home was located, who lived there and whether pets were present.
The research is published in the Proceedings of the Royal Society B.

This is really basic natural history we are investigating here

Dr Noah Fierer, University of Colorado at Boulder

Dr Noah Fierer, associate professor of ecology and evolutionary biology, who carried out the study, said: "This is really basic natural history we are investigating here.

Low vitamin-D genes linked to MS

By Michelle Roberts Health editor, BBC News online

• 26 August 2015
• From the section Health

 

Image caption This brain scan shows characteristic MS damage in the brain (highlighted in green)

People genetically prone to low vitamin-D levels are at increased risk of multiple sclerosis, a large study suggests.

The findings, based on the DNA profiles of tens of thousands of people of European descent, add weight to the theory that the sunshine vitamin plays a role in MS.

Blood test 'detects cancer relapse'

By James Gallagher Health editor, BBC News website

• 6 hours ago
• From the section Health

A blood test may be able to save lives by finding cancers that have started to grow again after treatment, a study suggests.

Scientists at the Institute of Cancer Research in London found traces of breast cancer eight months before doctors would normally have noticed.
In the trial, the test found 12 cancers out of the 15 women who relapsed.

How Not to Be Wrong: The Power of Mathematical Thinking

    

How Not to Be Wrong: The Power of Mathematical Thinking

Δημοσιεύτηκε στις 24 Ιουν 2015

The
maths we learn in school can seem like a dull set of rules, laid down
by the ancients and not to be questioned. Jordan Ellenberg shows how
wrong this view is through stories that show the power of mathematical
thinking.
Subscribe for regular science videos: http://bit.ly/RiSubscRibe

Maths
touches everything we do, allowing us to see the hidden structures
beneath the messy and chaotic surface of our daily lives. Maths is the
science of not being wrong, worked out through centuries of hard work
and argument.

Jordan Ellenberg is a professor of Mathematics at
University of Wisconsin, and the 'Do the Math' columnist at Slate. His
book 'How not to be wrong: The hidden mathematics of everyday life' was
be published in June 2015.

Subscribe for regular science videos: http://bit.ly/RiSubscRibe

Watch more science videos on the Ri Channel http://richannel.org
The Ri is on Twitter: http://twitter.com/ri_science
and Facebook: http://www.facebook.com/royalinstitution
and Tumblr: http://ri-science.tumblr.com/
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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 27/8/2015

The Race to Crack the Genetic Code with Matthew Cobb

     

The Race to Crack the Genetic Code with Matthew Cob

Δημοσιεύτηκε στις 19 Αυγ 2015

How
was the code of DNA cracked? How did it confirm the theory of
evolution? And why did life evolve the way it did? Matthew Cobb unravels
the tangled story.
Subscribe for regular science videos: http://bit.ly/RiSubscRibe

Nick
Lane and Matthew Cobb came together to tell the story of life. Nick
Lane's take on the tale will be released on 2 September.
Watch the Q&A here: https://www.youtube.com/watch?v=L4N6w...

Matthew
Cobb is Professor of Zoology and a senior lecturer in animal behaviour
at the University of Manchester. After spending some time researching
humans at the institute of psychiatry, a lot of his work now
investigates insect behaviour and its evolutionary and genetic basis,
particularly smell.


Subscribe for regular science videos: http://bit.ly/RiSubscRibe

Watch more science videos on the Ri Channel http://richannel.org
The Ri is on Twitter: http://twitter.com/ri_science
and Facebook: http://www.facebook.com/royalinstitution
and Tumblr: http://ri-science.tumblr.com/
Subscribe for the latest science videos: http://richannel.org/newsletter

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ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 27/8/2015

Η ΦΥΣΙΚΗ ΠΡΙΝ ΤΟ 1920

Η ΦΥΣΙΚΗ ΠΡΙΝ ΤΟ 1920

Είναι λίγο δύσκολο να ξεκινήσουμε αμέσως, διατυπώνοντας την τώρα επικρατούσα άποψη για τα πράγματα, οπότε θα δούμε πρώτα την κατάσταση, όπως αυτή είχε διαμορφωθεί γύρω στο 1920 και κατόπιν θα αφαιρέσουμε κάποια πράγματα από την εικόνα. Πριν το 1920, η εικόνα που είχαμε για τον κόσμο, έμοιαζε κάπως έτσι: Η «σκηνή» επί της οποίας διαδραματίζονται τα φαινόμενα του σύμπαντος είναι ο τρισδιάστατος χώρος της γεωμετρίας, όπως αυτός περιγράφεται από τον Ευκλείδη και η μεταβολή των πραγμάτων συμβαίνει σε ένα μέσο που ονομάζουμε χρόνο. Τα στοιχεία επί της σκηνής είναι, πρώτα-πρώτα, τα διάφορα σωματίδια (particles), για παράδειγμα τα άτομα, τα οποία διαθέτουν ορισμένες ιδιότητες.

QED: New Queries -- Richard Feynman (4/4)

    



QED: New Queries -- Richard Feynman (4/4)

Δημοσιεύτηκε στις 14 Μαρ 2012

The Sir Douglas Robb Lectures, University of Auckland, 1979

What does it mean, and where is it all leading?

Feynman's
lectures were originally given as the Sir Douglas Robb lectures at the
University of Auckland, New Zealand in 1979. Videotapes of these
lectures were made publicly available on a not-for-profit basis in 1996.

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QED: Electrons and their Interactions -- Richard Feynman (3/4)

      



QED: Electrons and their Interactions -- Richard Feynman (3/4)

Δημοσιεύτηκε στις 14 Μαρ 2012

The Sir Douglas Robb Lectures, University of Auckland, 1979

Feynman diagrams and the intricacies of particle interaction.

Feynman's
lectures were originally given as the Sir Douglas Robb lectures at the
University of Auckland, New Zealand in 1979. Videotapes of these
lectures were made publicly available on a not-for-profit basis in 1996.

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QED: Fits of Reflection and Transmission -- Quantum Behaviour -- Richard...

   

QED: Fits of Reflection and Transmission -- Quantum Behaviour -- Richard...

Δημοσιεύτηκε στις 14 Μαρ 2012

The Sir Douglas Robb Lectures, University of Auckland, 1979

What are reflection and transmission, and how do they work?

Feynman's
lectures were originally given as the Sir Douglas Robb lectures at the
University of Auckland, New Zealand in 1979. Videotapes of these
lectures were made publicly available on a not-for-profit basis in 1996.

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  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/8/2015

QED: Photons -- Corpuscles of Light -- Richard Feynman (1/4)

   

QED: Photons -- Corpuscles of Light -- Richard Feynman (1/4)

Δημοσιεύτηκε στις 14 Μαρ 2012

The Sir Douglas Robb Lectures, University of Auckland, 1979

A gentle lead-in to the subject, Feynman starts by discussing photons and their properties.

Feynman's
lectures were originally given as the Sir Douglas Robb lectures at the
University of Auckland, New Zealand in 1979. Videotapes of these
lectures were made publicly available on a not-for-profit basis in 1996.

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  ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/8/2015
  
  
  

SETI Summer Research Experience for Undergraduates lightning talks

         



SETI Summer Research Experience for Undergraduates lightning talks

Δημοσιεύτηκε στις 23 Αυγ 2015

Have
you ever wondered what it would be like to work at the SETI Institute?
This summer, college students from around the United States spent 10
weeks working with researchers through the Institute's Research
Experience for Undergraduates in Astrobiology program. Organized by
Senior Scientist Jean Chiar, the students worked on projects spanning
the field of astrobiology from microbiology to planetary geology to
observational astronomy.

At the end of their stay, each student presented a 3 minute synopsis of their work in lightning round fashion.

2015 Class (In order of presentation)

Melissa Hannan (Cal State, San Bernardino); Mentor: Peter Jenniskens
Finding Diversity in Our Solar System Through Impact Induced Breakdown Spectroscopy

Yuta Takagi (Oberlin College); Mentor: Pascal Lee
Potential for Water on Phobos and Deimos

Shannen Acedillo (Cal Poly Pomona); Mentor: Pascal Lee
Precursor Measurements for Human Exploration to Phobos and Deimos

Stephen Heywood (Cal State, San Marcos); Mentor: Richard Quinn
Synthesis of Calcium Sulfate for use as Mars Simulant

Paige Morkner (Cal Poly San Luis Obispo); Mentor: Virginia Gulick
Remote Exploration of Mars Surface Processes

Kaley Brauer (Brown University): Mentor: Michael Busch
2000 RS11: An Unusual Near-Earth Asteroid

Mara Zimmerman (Juniata College): Mentor: Susan Mullally
Heartbeat Stars in Kepler Data: Determining Rotation Spots and Pseudosynchronization

Katie Karnes (Colgate University); Mentor: Jeff Smith
Detecting K2 Campaign 3 Planet Candidates: The Pipeline

Tarryn Kahre (U of Oklahoma); Mentor: Douglas Caldwell
Detecting K2 Campaign 3 Planet Candidates: The Catalog

Isabel Angelo (UC Berkeley); Mentor: Jason Rowe
False Positive Analysis of Kepler Planet Candidates

Sarah Blunt (Brown University); Mentors: Eric Nielsen & Franck Marchis
Distinguishing Exoplanets from Background Objects Using Random Orbit Generation for the Gemini Planet Imager

Rosa Diaz (Cal Poly Pomona); Mentor: Gerry Harp
Time-Resolved Spectral Analysis of Blazar 0714+716 Data

Gage Edgar (Principia College); Mentor: Eliot Gillum
OSETI Sensitivity and Detection

Matt Herman (Principia College); Mentor: Eliot Gillum
OSETI Hardware and Optimization

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ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/8/2015

What if there was a black hole in your pocket?

     



What if there was a black hole in your pocket?

Δημοσιεύτηκε στις 16 Ιουλ 2015

What would happen to you if a black hole the size of a coin suddenly appeared in your pocket? Lets find out!


Check out www.Quarksandcoffee.com for more stuff like this video!

Original reddit askscience post: http://bit.ly/1fLEHi6

Kurzgesagt Subreddit: http://www.reddit.com/r/kurzgesagt


Videos, explaining things. Like evolution, time, space, global energy or our existence in this strange universe.
We are a team of designers, journalists and musicians who want to make science look beautiful. Because it is beautiful.




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Visit us on our Website, Twitter, Facebook, Patreon or Behance to say hi!

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What if there was a black hole in your pocket?

Help us caption & translate this video!

http://amara.org/v/GqGA/

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NASA TV Public

   

NASA TV Public



εκίνησε στις 24 Αυγ 2015

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Japanese Cargo Ship Arrives at the Space Station

     

Japanese Cargo Ship Arrives at the Space Station

Δημοσιεύτηκε στις 24 Αυγ 2015

The
Japanese Aerospace Exploration Agency’s (JAXA) “Kounotori” H-II
Transfer Vehicle (HTV-5) arrived at the International Space Station Aug.
24 to deliver almost five tons of supplies and scientific experiments
to the Expedition 44 crew. The cargo vehicle was launched atop a
Japanese H-IIB rocket Aug. 19 from the Tanegashima Space Center in
southern Japan.

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Final Encounter: Cassini and Dione

     

Final Encounter: Cassini and Dione

Δημοσιεύτηκε στις 21 Αυγ 2015

The
Cassini Spacecraft swooped in for the last of five close encounters
with one of the most beautiful moons in our solar system: Dione. After
more than a decade exploring the Saturn system, the Cassini-Huygens
mission must be regarded as one of the most successful science missions
ever. It has already amassed one of the greatest photographic
collections of all time. Revel in the details of Dione out near the
limits of the solar system.

Music by Epidemic Sound (http://www.epidemicsound.com)

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 24/8/2015

ΕΙΣΑΓΩΓΗ ΣΤΗΝ ΕΠΙΣΤΗΜΗ ΤΗΣ ΦΥΣΙΚΗΣ

ΕΙΣΑΓΩΓΗ

Στο Κεφάλαιο αυτό, θα εξετάσουμε τις πλέον θεμελιώδεις ιδέες που έχουμε για τη φυσική—τη φύση των πραγμάτων, όπως την αντιλαμβανόμαστε σήμερα. Δεν θα συζητήσουμε την ιστορία του πώς είμαστε σε θέση να γνωρίζουμε ότι οι ιδέες αυτές είναι σωστές· οι λεπτομέρειες αυτές θα παρασχεθούν σε μετέπειτα χρόνο.

Οι οντότητες και τα πράγματα με τα οποία ασχολούμαστε στην επιστήμη, εμφανίζονται σε μια πλειάδα μορφών και μια πολλαπλότητα χαρακτηριστικών.

Documentary 2015 | Wonders of the Universe | Falling & Messengers

    

Documentary 2015 | Wonders of the Universe |  Falling & Messengers

Δημοσιεύτηκε στις 14 Ιουλ 2015

- How the Universe Works: https://goo.gl/TcxEvS
- Wonders of the Universe: https://goo.gl/DmKcDB

SUBSCRIBE MY CHANEL MORE NEW Videos: If you like my channel.Pls like share and comment! Thanks For Watching!

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Mers: The new coronavirus explained

An outbreak of Middle East respiratory syndrome (Mers) has claimed lives in South Korea.

The World Heath Organization (WHO) says the new coronavirus appears to be passing between people in close contact.
It is the biggest outbreak of Mers, which is similar to the Sars virus, outside the Middle East.
What is this new virus and should we be concerned?

Vaccine for Mers coronavirus 'looks promising'

By Smitha Mundasad Health reporter

• 20 August 2015
• From the section Health

 

A prototype vaccine against the lung infection Mers coronavirus has shown promising results, scientists say.

The study, published in the journal Science Translational Medicine, suggests the vaccine guards against the disease in monkeys and camels.
Researchers hope with more work it could be turned into a jab for humans.

Διαθέσιμη η τεχνολογία ομιλίας του Στίβεν Χόκινγκ

Το λογισμικό της Intel που επιτρέπει στον διάσημο φυσικό να μιλάει με τη βοήθεια υπολογιστή είναι πλέον διαθέσιμο για το κοινό

ΔΗΜΟΣΙΕΥΣΗ:  20/08/2015 15:16

Φωνή σε ασθενείς που πάσχουν από νευροεκφυλιστικές νόσους οι οποίες πλήττουν την ικανότητα της επικοινωνίας τους χαρίζει η Intel μέσω της κίνησής της, ενώ παράλληλα ανοίγει την πόρτα στους developers για περαιτέρω βελτιώσεις

Το σύστημα της Intel το οποίο από τα τέλη της δεκατίας του ‘90 προσφέρει στον Στίβεν Χόκινγκ τη δυνατότητα να εκφράζεται με τη βοήθεια ηλεκτρονικού υπολογιστή δημοσίευσε διαδικτυακά ο αμερικανικός κολοσσός.

Ο πρώτος ανθρώπινος εγκέφαλος εργαστηρίου

Εχει μέγεθος γόμας μολυβιού και αντιστοιχεί στον εγκέφαλο εμβρύου πέντε εβδομάδων σύμφωνα με αμερικανούς επιστήμονες

ΔΗΜΟΣΙΕΥΣΗ:  19/08/2015 10:43

Και ξαφνικά τα σενάρια ταινιών επιστημονικής φαντασίας δεν φαντάζουν τόσο μακρινά...

 

Επιστήμονες στις ΗΠΑ ανακοίνωσαν ότι ανέπτυξαν στο εργαστήριο για πρώτη φορά έναν σχεδόν πλήρη ανθρώπινο εγκέφαλο, ο οποίος αντιστοιχεί στον πραγματικό εγκέφαλο ενός εμβρύου ηλικίας πέντε εβδομάδων.

Η μουτζούρα της πόλης «εκπνέει» τοξικά αέρια

Η μαυρίλα που βάφει τα κτίρια των αστικών κέντρων απελευθερώνει διοξείδιο του αζώτου όταν εκτίθεται στην ηλιακή ακτινοβολία

ΔΗΜΟΣΙΕΥΣΗ:  19/08/2015 13:08

Τοξική η ηλιοφάνεια στην πόλη...

 

Η «μουτζούρα» των πόλεων δεν αποτελεί απλά ένα αντιαισθητικό αποτέλεσμα της ρύπανσης της ατμόσφαιρας των αστικών κέντρων, βάφοντας σε γκρίζο χρώμα κτίρια και άλλες επιφάνειες. Σύμφωνα με νέα καναδική μελέτη, όταν η συγκεκριμένη μαυρίλα δεχθεί ηλιακή ακτινοβολία απελευθερώνει εκ νέου διοξείδιο του αζώτου και νιτρικό οξύ – που αποτελεί το βασικό συστατικό του νέφους.

Το καινούργιο «selfie» του Curiosity

Ο ρομποτικός εξερευνητής προσφέρει μια ακόμη εντυπωσιακή φωτογραφία του με φόντο το κόκκινο τοπίο του Αρη

ΔΗΜΟΣΙΕΥΣΗ:  20/08/2015 21:25

Το νέο «selfie» του Curiosity που έδωσε στη δημοσιότητα η NASA τραβήχτηκε στις 5 Αυγούστου του 2015 Πηγή NASA/JPL-Caltech/MSSS

 

Ουάσινγκτον 

Ένα ακόμη «selfie» του Curiosity έδωσε στη δημοσιότητα η NASA. Τη φορά αυτή η λήψη της εικόνας έχει γίνει από χαμηλή γωνία προσφέροντας μια εντυπωσιακή άποψη με φόντο το κόκκινο τοπίο του αρειανού όρους Σαρπ.

Οι κομήτες «γέννησαν» τη ζωή;

Πείραμα δείχνει ότι και μόνο η πρόσκρουσή τους σε έναν πλανήτη μπορεί να παράγει βασικά δομικά συστατικά της

ΔΗΜΟΣΙΕΥΣΗ:  19/08/2015 20:24

Η πρόσκρουση ενός κομήτη σε έναν πλανήτη πυροδοτεί χημεία που παράγει βασικά συστατικά της ζωής όπως έδειξε πείραμα επιστημόνων από την Ιαπωνία

Πράγα 
Δεν είναι λίγοι οι επιστήμονες που υποστηρίζουν ότι η ζωή δεν γεννήθηκε στη Γη αλλά έφθασε εδώ από το Διάστημα με «όχημα» κάποιον κομήτη. Τώρα ένα πείραμα που διεξήγαγαν ιάπωνες ερευνητές έρχεται να δείξει ότι οι κομήτες δεν μπορούν μόνο να μεταφέρουν από κάπου αλλού τη ζωή σε έναν πλανήτη αλλά και να παραγάγουν βασικά δομικά συστατικά της απλώς και μόνο συγκρουόμενοι με αυτόν. Τα αποτελέσματα προσφέρουν μια ακόμη ένδειξη υπέρ του ότι ο πλανήτης μας ενδεχομένως δεν είναι ο μοναδικός «ζωντανός» πλανήτης στο Σύμπαν.

Άφθονο «ρέει» το νέον στην ατμόσφαιρα της Σελήνης

Οι υποψίες της NASA επιβεβαιώθηκαν μέσω της ανάλυσης των δεδομένων του δορυφόρου LADEE

ΔΗΜΟΣΙΕΥΣΗ:  19/08/2015 10:52

Τα νέα στοιχεία επιβεβαιώνουν τις υποψίες των ειδικών ήδη από την εποχή των αποστολών «Απόλλων»

Αθήνα 

Από τώρα μπορεί κανείς να φανταστεί μια διαφημιστική πινακίδα να αναβοσβήνει τα βράδια στο φεγγάρι, καθώς η Αμερικανική Διαστημική Υπηρεσία (NASA) επιβεβαίωσε για πρώτη φορά ότι η ατμόσφαιρα της Σελήνης περιέχει νέον και μάλιστα σε μεγάλη ποσότητα.

Πετραδάκι-πετραδάκι «χτίστηκε» ο Δίας

Από την συγκέντρωση... βότσαλων ξεκίνησε η δημιουργία του Δία και του Κρόνου σύμφωνα με νέα αμερικανική μελέτη

ΔΗΜΟΣΙΕΥΣΗ:  21/08/2015 14:07

Καλλιτεχνική απεικόνιση της NASA γύρω από τον σχηματισμό των αέριων γιγάντων

 
Οι γίγαντες του ηλιακού μας συστήματος χτίστηκαν «πετραδάκι-πετραδάκι» σε βάθος 10 εκατ. ετών, εκτιμούν αμερικανοί αστρονόμοι από το Νοτιοδυτικό Ινστιτούτο Έρευνας στο Μπόλντερ, στο Κολοράντο.

Συγκεκριμένα, οι ειδικοί πιστεύουν ότι ο Δίας και ο Κρόνος δημιουργήθηκαν από αέρια τα οποία περικύκλωναν έναν πυρήνα στο μέγεθος της Γης αποτελούμενο από… διαστημικά βότσαλα.

The Story Of The Universe : Big Bang, Space-time, And The Relativity The...

    



The Story Of The Universe : Big Bang, Space-time, And The Relativity The...

Δημοσιεύτηκε στις 13 Δεκ 2014

The
Universe is all of spacetime and everything that exists therein,
including all planets, stars, galaxies, the contents of intergalactic
space, the smallest subatomic particles, and all matter and
energy.[1][2][3][4][5][6] Similar terms include the cosmos, the world,
reality, and nature.

The estimated diameter of the observable
universe is about 93 billion light years or 28 billion parsecs.[7]
Scientific observation of the Universe has led to inferences of its
earlier stages, which appear to have been governed by the same physical
laws and constants throughout most of its extent and history. The Big
Bang theory is the prevailing cosmological model that describes the
early development of the Universe, which is estimated to have begun
13.798 ± 0.037 billion years ago.[8][9]

Scientists remain unsure
about what, if anything, preceded the Big Bang. Many refuse to
speculate, doubting that any information from any such prior state could
ever be accessible.[citation needed] There are various multiverse
hypotheses, in which some physicists have suggested that the Universe
might be one among many, or even an infinite number, of universes that
likewise exist.[10][11]

The universe is composed of 4.9 percent
atomic matter, 26.6 percent dark matter and 68.5 percent dark energy[12]
Observations of supernovae have shown that the Universe is expanding at
an accelerating rate.[13] There are several competing theories about
the ultimate fate of the universe.

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  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 23/8/2015
  
  
  

Reality Since Einstein

    

Reality Since Einstein

Δημοσιεύτηκε στις 23 Ιουλ 2015

In
celebration of the 100th anniversary of Einstein's general theory of
relativity, leaders from multiple fields of physics discuss its
essential insights, its lingering questions, the latest work it has
sparked, and the allied fields of research that have resulted.

Original Program Date: 05/30/2015
Subscribe to our YouTube Channel for all the latest from WSF.

Visit our Website: http://www.worldsciencefestival.com/
Like us on Facebook: https://www.facebook.com/worldscience...
Follow us on twitter: https://twitter.com/WorldSciFest

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wormholes, black holes and white holes explained

    

wormholes, black holes and white holes   explained

Δημοσιεύτηκε στις 6 Ιουν 2015

Until
recently, the black holes in our universe were thought to be massive
singularities that devour stars and galaxies.However, some new theories
suggests that black holes may turn into white holes that explosively
pour all the material the black holes swallowed back into space. If this
is the case, then there is a connection between white and black holes:
the wormhole.

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ANAΡΤΗΣΗ ΑΠΟ  ΤΟ YOUTUBE 23/8/2015

Black Holes & Wormholes (interstellar movie explained understand)

   

Black Holes & Wormholes (interstellar movie explained understand)

Δημοσιεύτηκε στις 9 Ιουν 2015

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to understand animation explaining interstellar movie The Science of
‘Interstellar’ - Making Of InterStellar - Behind The Scenes.. Matthew
McConaughey narrates this behind-the-scenes look at the epic voyage to
deep space depicted in the movie Interstellar. Director Christopher
Nolan worked with top physicists to create a realistic trip to distant
solar systems.

This is The Discovery Channel special on the
actual HARD SCIENCE behind the concepts of wormholes and quantum
singularities explored in the upcoming science fiction epic Interstellar
from.

The Science of Interstellar Discovery Channel Documentary.

- Interstellar Featurettes - Behind The Scenes (2014) Matthew McConaughey Sci-Fi Movie HD Release Date: November 7.

science
of interstellar - interstellar explained - interstellar in real life My
own tips and tricks for othe yildizlar arasinda film aciklama

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ΑΝAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 23/8/2015

Black Holes and Worm Holes

    

Black Holes and Worm Holes

Ανέβηκε στις 3 Μαΐ 2009

a short video about black holes and worm holes taken from a show called the universe.
watch their other eposite about planets, galaxies and ofcourse the rest of univeres

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  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 23/8/2015
  
  
  

Black Holes, White Holes, and Wormholes

    

Black Holes, White Holes, and Wormholes

Δημοσιεύτηκε στις 4 Μαρ 2014

My Astronomy Project

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  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 23/8/2015
  
  
  

Black Hole,Dark Matter, Dark Energy Full Documentary Science HD

   



Black Hole,Dark Matter, Dark Energy Full Documentary Science HD

Δημοσιεύτηκε στις 28 Μαρ 2015

Dark
matter is a hypothetical kind of matter that cannot be seen with
telescopes but accounts for most of the matter in the Universe. The
existence and properties of dark matter are inferred

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ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/8/2015

What is Dark Matter and Dark Energy?

    

What is Dark Matter and Dark Energy?

Δημοσιεύτηκε στις 6 Αυγ 2015

What
is dark energy? What is dark matter? Well, if we knew exactly we would
have a nobel prize – we know that they exist though. So what do we know
about those strange things?

Check out THE NOVA PROJECT to learn more about dark energy: www.nova.org.au

Music by: www.epic-mountain.com

Visit us on our Website, Twitter, Facebook, Patreon or Behance to say hi!

http://kurzgesagt.org
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Help us caption & translate this video!

http://amara.org/v/GvTr/

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/8/2015

The Largest Galaxy in the Universe: IC 1101

    

The Largest Galaxy in the Universe: IC 1101

Δημοσιεύτηκε στις 21 Σεπ 2012

http://gplus.to/TonyDarnell
http://facebook.com/SpaceFan

This video was done by request from a Space Fan. Hope it's what you had in mind.

Dark Matter:
Not available

The Edge:
Not available

Skyships:
http://archive.org/details/jamendo-04...

Sea of Sorrow:
http://archive.org/details/hnr026

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ ΥOUTUBE   19/8/2015

Starspots and the dynamic evolution... Jeremy Tregloan-Reed (SETI Talks)

    

Starspots and the dynamic evolution... Jeremy Tregloan-Reed (SETI Talks)

Δημοσιεύτηκε στις 19 Μαρ 2015

Full title:
Starspots and the dynamic evolution of hot-Jupiter exoplanet systems

When
a hot-Jupiter transits its host star and crosses an active region there
is a possibility that it will occult a starspot. When this happens a
starspot anomaly is usually seen in the resulting transit lightcurve.
Generally viewed as a nuisance, the most common approach is to remove
the affected data points before performing an analysis to determine the
lightcurve properties. However, when a starspot anomaly is found in
transit photometry it can allow a wealth of information to be
discovered. Apart from determining the physical properties of the
starspot (such as position, size and temperature) if a starspot anomaly
is found in two sets of transit photometry and is due to the same
starspot it is then possible to determine the stellar rotation period at
the given latitude of the starspot. It is also possible to measure the
sky-projected stellar obliquity of the system which can then begin to
shed some light on the primary mechanism of the dynamical evolution of
the system.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 18/8/2015