Misconceptions About the Universe

Can we see things travelling faster than light?

Thanks to Prof. Geraint Lewis for input on earlier drafts of this video.

The expanding universe is a complicated place. During inflation the universe expanded faster than light, but that’s something that actually happens all the time, it’s happening right now. This doesn’t violate Einstein’s theory of relativity since nothing is moving through space faster than light, it’s just that space itself is expanding such that far away objects are receding rapidly from each other. Common sense would dictate that objects moving away from us faster than light should be invisible, but they aren’t. This is because light can travel from regions of space which are superluminal relative to us into regions that are subluminal. So our observable universe is bigger than our Hubble sphere - it’s limited by the particle horizon, the distance light could travel to us since the beginning of time as we know it.

via Veritasium.


ESA Euronews: Echoes from the Big Bang

Scientists are getting closer than ever to understanding the origins of the Universe. For the first time, they have glimpsed behind the veil that covers the ‘Big Bang’ with the announcement that the Background Imaging of Cosmic Extragalactic Polarisation — BICEP2 — experiment at the South Pole had spotted the footprints of something called primordial gravitational waves. These waves may be a sign that a theory known as cosmic inflation can be confirmed. For those studying the Big Bang — the beginning of the Universe — this is big news.

via ESA.


Primordial Gravitational Waves

Video features Professor Ed Copeland and Professor Mike Merrifield from the University of Nottingham.

See more information and the papers at: http://bicepkeck.org/#papers

More on inflation: http://youtu.be/m7C9TjdziPE
LHC videos: http://bit.ly/LHCvideos

This project features scientists from The University of Nottingham
http://www.tumblr.com/blog/skeptv/new/video

Sixty Symbols videos by Brady Haran

via Sixty Symbols.
website at http://www.sixtysymbols.com/
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Twitter at http://twitter.com/#!/periodicvideos

Ways The Universe Could End

We all know the theory surrounding the early development of the universe thanks to the cosmological model of this development called the Big Bang Theory. With the age of the universe pinned at 13.798 billion years ago, the universe has been around for an extremely long time.

There are many theories on how the universe will end or maybe it will never end and will continue expand forever. Dark energy, the equation of state and the shape of the universe all play a role on the fate of the universe.

Check out our latest video which goes over ways the universe could end!

via sciBRIGHT.


Gravitational Wave Discovery! Evidence of Cosmic Inflation

Baby photos of our universe show huge early growth spurt!

Some clarifications:
- The lengthening of wavelengths is not strictly due to stretching by the expanding universe but by the way the photons were emitted and absorbed in different frames of reference.
- The effects of gravitational waves have been observed in the decaying orbital periods of some binary star systems, however detectors built to measure gravitational waves stretching and squeezing matter on Earth have not as yet detected them.
- In the video I sometimes use the term Big Bang to refer to the beginning of time as we know it. The Big Bang actually refers to the whole process from the formation of our universe, through inflation, to the expanding mass of plasma in the early universe (not just the first instant).
- Quantum gravity is by no means established by this observation but it is suggestive that General Relativity and Quantum Mechanics are working together here.

Thank you to Professor Geraint Lewis and Henry Reich for comments on earlier drafts of this video (even if I haven’t accepted all of your corrections).

via Veritasium.

What is the universe made of?

The atoms around you have existed for billions of years — and most originated in the flaming, gaseous core of a star. Dennis Wildfogel tells the captivating tale of these atoms’ long journeys from the Big Bang to the molecules they form today.

View full lesson: http://ed.ted.com/lessons/what-is-the-universe-made-of-dennis-wildfogel

Lesson by Dennis Wildfogel, animation by Pew36 Animation Studios.

via TED Education.


And Now the Good News №77

First Direct Evidence of Cosmic Inflation
Paleontologists announce discovery of Anzu wyliei
A New Large-Bodied Oviraptorosaurian Theropod Dinosaur from the Latest Cretaceous of Western North America
Nanoscale optical switch breaks miniaturization barrier

via Steve Shives.


A Polarizing Discovery About the Big Bang!

Minute Physics provides an energetic and entertaining view of old and new problems in physics — all in a minute!

And special thanks to Sean Carroll and Mark Trodden for their comments and discussion in the making of this video.

Links to more info about the BICEP experiment:
http://www.cfa.harvard.edu/news/2014-05
http://bicepkeck.org/
http://www.caltech.edu/content/building-bicep2-conversation-jamie-bock
http://www.slate.com/blogs/bad_astronomy/2014/03/17/evidence_of_inflation_astronomers_detect_gravitational_waves_from_the_early.html

More about the Big Bang: https://www.youtube.com/watch?v=q3MWRvLndzs
More about the Cosmic Background Radiation: https://www.youtube.com/watch?v=_mZQ-5-KYHw

Music by Nathaniel Schroeder http://www.soundcloud.com/drschroeder

via Minute Physics.
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Meet The Chicken From Hell, Titan Has Waves and More!

This week on IFLS, the sea anemone is discovered to be half plant and half animal, moss that comes alive after being frozen for 1500 years, and much more!

Chicken from hell: http://bit.ly/PTTDxX
Gravitational waves: http://bit.ly/1kCt2iO
Waves on Titan: http://bit.ly/OtnPPo
Sea anemone: http://bit.ly/1nCdWOV
Venus: http://bit.ly/1geFiGP
Moss: http://bit.ly/1gGLoef

Join Elise each week to see the all the latest and greatest stories from the lighter side of science, including popular science, space, biology, nature, and more. Subscribe now!

via IFLScience.
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How Big Is The Universe?

Beakus were commissioned to create three animated films that explain key concepts about our universe, with humour helping to explain the ‘almost’ unexplainable! Director Amaël Isnard also designed the films.

In ‘How Big Is The Universe?’ ROG astronomer Liz shows us the expanding nature of the Universe and how this affects the light reaching us from distant galaxies, some of which will remain forever hidden from our view.

via Beakus.


Space Fan News №130 - Direct Evidence for Inflation, Largest yellow hypergiant, & NO PLANET X!

Direct Evidence of Inflation:
http://www.scientificamerican.com/article/gravity-waves-cmb-b-mode-polarization/
http://www.scientificamerican.com/article/gravity-waves-inflation/
http://www.preposterousuniverse.com/blog/2014/03/16/gravitational-waves-in-the-cosmic-microwave-background/
Largest Yellow Hypergiant Star:
http://www.eso.org/public/news/eso1409/
No Planet X:
http://www.jpl.nasa.gov/news/news.php?release=2014-075

via The Space Fan News.
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The Countdown №44 - 5 Essential Facts About Gravity Waves from the Big Bang

On March 17th, physicists with the BICEP2 experiment announced they had detected the remnant of gravity waves in the cosmic background radiation, the light left over from the big bang. While still needing confirmation, the discovery lends weight to the idea that the early universe underwent rapid expansion.

More to explore:
BICEP2 page
Simple Gravitational Waves
All You Need to Know about Gravitational Waves

via Space Lab.


What Is The Cosmic Microwave Background Radiation?

The Cosmic Microwave Background Radiation is the afterglow of the Big Bang; one of the strongest lines of evidence we have that this event happened. UCLA’s Dr. Ned Wright explains.

via Universe Today.


Why Is This A Special Time For The Universe?

You might be surprised to know that you’re living in a very special time in the Universe. And in the far future, our descendent astronomers will wish they could live in such an exciting time Let’s find out why.

via Universe Today.