Wormholes and Super Fast Space Transportation - Full Documentary

                  

Wormholes and Super Fast Space Transportation - Full Documentary 

Δημοσιεύτηκε στις 11 Φεβ 2015

To
be in with a chance of winning one of our cool science gadgets at the
end of the month, SHARE this video and be put in to the pot of potential
winners.
What's going on guys! Today we've received a recently new
and highly interesting documentary relating to wormholes and space
transportation.
If you enjoyed don't hesitate to hit the LIKE and SUBSCRIBE button.

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ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/3/2016

Why You Can Never Reach the Speed of Light: A Visualization of Special R...

                     



Why You Can Never Reach the Speed of Light: A Visualization of Special R...

Δημοσιεύτηκε στις 7 Οκτ 2015

This
video is an entry for the Breakthrough Junior Challenge 2015 which
gives a unique visualization of Special Relativity using hyperbolic
geometry.

This idea was inspired by the famous woodcut by M.C. Escher Circle Limit III. http://www.mcescher.com/gallery/recog...

I
liked the idea of making a video on Special Relativity because I had
already explored the use of M.C. Escher’s woodcut Circle Limit III as a
teaching tool for explaining the hyperbolic geometry of Minkowski
spacetime. The main intuition is that the principle of Relativity
asserts that the manifold of frames of reference is homogeneous and
isotropic, and there are exactly three geometries associated with this:
Sphere (which exists as rotations through space), Plane (which
represents Galilean Relativity) and the Hyperbolic Plane (which exists
as rotations through spacetime).

I wanted to find a way to use
this intuition without overwhelming the audience with technical terms.
When the timelike unit vectors in 2+1 spacetime (which correspond to
velocity four-vectors) are projected onto a disk (see Wikipedia:
“Hyperboloid model”), the result is the Poincare Disk Model, which is
(almost) the geometry portrayed in Circle Limit III. I had never seen
anyone to use this as a visualization of Special Relativity, and so I
decided to make the video.

Public Domain Image Sources (in order of appearance):
Einstein: https://commons.wikimedia.org/wiki/Ca...
pulse of light: https://pixabay.com/en/light-bokeh-ye...
stopwatches: https://pixabay.com/en/stopwatch-cloc...
crowd: https://pixabay.com/en/men-personal-m...
beakers: https://pixabay.com/en/beakers-experi...
map: https://pixabay.com/en/world-map-eart...
wall clock: https://pixabay.com/en/clock-analog-t...
starburst: http://www.cliparthut.com/starburst-c...
Electric Current: https://pixabay.com/en/current-electr...
mouth: https://pixabay.com/en/lips-sexy-mout...
water waves: https://pixabay.com/en/banner-header-...
cosmic lake: https://pixabay.com/en/graphics-virtu...
Galileo: http://fineartamerica.com/featured/1-...
flashlight: https://pixabay.com/en/light-torch-la...
Poincare: https://commons.wikimedia.org/wiki/Fi...é-2.jpg
Einstein: https://commons.wikimedia.org/wiki/Ca...
Lorentz: :https://en.wikipedia.org/wiki/Hendrik...
Minkowski: :https://en.wikipedia.org/wiki/Oskar_M...
star cluster:https://pixabay.com/en/star-clusters-...
trash can: https://pixabay.com/en/trash-can-garb...
Einstein and Lorentz: https://en.wikipedia.org/wiki/Hendrik...
car: https://pixabay.com/en/car-red-vehicl...
bicycle: https://pixabay.com/en/vintage-bicycl...
jet: https://pixabay.com/en/jet-airplane-p...
spacetime: https://en.wikipedia.org/wiki/Minkows...
atomic cloud: https://pixabay.com/en/explosion-nucl...
stopwatch: https://pixabay.com/en/stopwatch-raci...

Software used to create this video includes iMovie, Keynote, Pixelmator, MathType, and Quicktime Player.

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ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 18/3/2016

SETI and the Computational Universe - Stephen Wolfram (SETI Talks)

                          



SETI and the Computational Universe - Stephen Wolfram (SETI Talks)

Δημοσιεύτηκε στις 15 Μαρ 2016

Dr
Stephen Wolfram, founder & CEO of Wolfram Research, and creator of
Mathematica, Wolfram|Alpha and the Wolfram Language will come to the
SETI Institute to discuss his latest thinking about the relation between
searching for complex behavior in the computational universe of simple
programs, using this in creating AI, and searching for intelligence
elsewhere in our physical universe.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 18/3/2016

Curiosity and Future Mars Robots

                       





Curiosity and Future Mars Robots

Ζωντανή μετάδοση στις 4 Μαρ 2016

This
month's hangouts sets the stage for the future of humans going to Mars.
We talk with Dr. Ashwin Vasavada to discuss latest results from the
surface of Mars and Dr. Jim Garvin to discuss plans for future robotics
missions to Mars.

We hope you can make it and please bring your questions and comments!

Follow DeepAstronomy on Twitter:
@DeepAstronomy

Like DeepAstronomy on Facebook:
https://www.facebook.com/DeepAstronomy/

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http://google.com/+DeepAstronomy
http://google.com/+TonyDarnell

We also have a great Google+ Community, come share your thoughts and join the discussion!
https://plus.google.com/communities/1...

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  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 18/3/2016
  
  
  

SFN #155: Hubble Finds Most Distant Galaxy; LIGO & Gamma Rays; Get Ready...

                         



SFN #155: Hubble Finds Most Distant Galaxy; LIGO & Gamma Rays; Get Ready... 

Δημοσιεύτηκε στις 4 Μαρ 2016

Apologies for the sound, a critical mic failed during recording and I simply didn't have time to re-do the episode.

Here are the links for this week's stories:

Hubble's Distant Galaxy:
http://hubblesite.org/newscenter/arch...

Gamma Ray Observed in LIGO Event:
https://www.cfa.harvard.edu/news/2016-05

ESA's EXOMARS Gets Started this Month:
http://exploration.esa.int/mars/46048...

Thanks to all who support SFN on Patreon!
https://patreon.com/SFN


Follow DeepAstronomy on Twitter:
@DeepAstronomy

Like DeepAstronomy on Facebook:
https://www.facebook.com/DeepAstronomy/

Like Space Fan News on Facebook:
https://www.facebook.com/SpaceFan/

Follow DeepAstronomy on Google+
http://google.com/+DeepAstronomy
http://google.com/+TonyDarnell

We also have a great Google+ Community, come share your thoughts and join the discussion!
https://plus.google.com/communities/1...

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 18/3/2016

Zika: The key unanswered questions

By James Gallagher Health editor, BBC News website

• 5 February 2016
• From the section Health

Image copyright SPL

Zika virus

• Zika outbreak: What you need to know
• Zika outbreak: Travel advice
• Mothers' fears amid Zika outbreak
• Video How mums-to-be are tackling Zika

This grainy image is one of the few pictures of the Zika virus.

The infection has prompted the World Health Organization to declared a global health emergency due to the link to thousands of suspected cases of babies born with small brains - or microcephaly - in Brazil.
But there are still many, crucial, unanswered questions.

Το μαγνητικό μεγαλείο του Ηλιου

Εκπληκτικές εικόνες από το μητρικό μας άστρο

ΔΗΜΟΣΙΕΥΣΗ:  16/03/2016 11:30

Μια από τις πραγματικά εντυπωσιακές εικόνες του μαγνητικού πεδίου του Ηλιου. Credit: (NASA/SDO/AIA/LMSAL)

 
Η NASA έδωσε στη δημοσιότητα εκπληκτικές εικόνες που κατέγραψε το διαστημικό παρατηρητήριο SDO το οποίο μελετά τον Ηλιο. Πιο συγκεκριμένα το SDO κατέγραψε εικόνες από το μαγνητικό πεδίο του μητρικού μας άστρου. Οι εικόνες αυτές θα βοηθήσουν τους επιστήμονες να κατανοήσουν καλύτερα τις  διεργασίες στο μαγνητικό πεδίο του Ηλιου για τις οποίες οι επιστήμονες γνωρίζουν λίγα πράγματα.