By popular space Fan request, I offer this video to help answer some of your questions regarding the expanding universe. Many of you consistently ask: If the universe is expanding, then what is it expanding into?
This concept is non-trivial to try and explain in a 5 minute YT video, but I do my best. I hope this helps!
Thanks to all of you space fans for watching this channel, it means a lot to me.
Music from Kevin MacLeod:
http://incompetech.com
Duration : 0:5:48
Horizon: Is Everything We Know About the Universe Wrong? (2010)
Part 1: http://www.youtube.com/watch?v=ge6RjTgyLr0
Part 2: http://www.youtube.com/watch?v=Ij5q8WVyNVI
Part 3: http://www.youtube.com/watch?v=KPDd3Umv06c
Part 4: http://www.youtube.com/watch?v=KF-N4_zfGJI
Part 5: http://www.youtube.com/watch?v=2ElbuzKrTkk
Part 6: http://www.youtube.com/watch?v=X4rv9BqTWzI
Runtime: 00:58:56
There’s something very odd going on in space, something that shouldn’t be possible. It is as though vast swathes of the universe are being hoovered up by a gigantic and invisible celestial vacuum cleaner.
Sasha Kaslinsky, the scientist who discovered the phenomenon, is understandably nervous: ‘It left us quite unsettled and jittery,’ he says, ‘because this is not something we planned to find.’ The accidental discovery of what is ominously being called ‘dark flow’ not only has implications for the destinies of large numbers of galaxies but threatens to overturn our current understanding of the birth and evolution of the universe.
Does dark flow herald a new era of cosmological understanding, or does it simply mean that everything we know about the universe is wrong?
Another brilliant documentary from the BBC’s ‘Horizon’ series.
Duration : 0:9:56
The universe has long captivated us with its immense scales of distance and time. How far does it stretch? Where does it end and what lies beyond its star fields and streams of galaxies extending as far as telescopes can see? These questions are beginning to yield to a series of extraordinary new lines of investigation and technologies that are letting us to peer into the most distant realms of the cosmosBut also at the behavior of matter and energy on the smallest of scales. The mind-blowing answer comes from a theory describing the birth of the universe in the first instant of time.
Duration : 0:20:13
Hubblecast 27: What Hubble Taught Us About The planets.
For nineteen years, NASA/ESA’s Hubble space Telescope has made some of the most dramatic discoveries in the history of astronomy but it has also helped scientists learn more about our own Solar System. From its vantage point 600 km above the Earth, Hubble has studied every planet in our Solar System except Mercury where light from the Sun would damage its instruments.
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Hubble has captured the impact of a comet on Jupiter, immense storms on Neptune and even tiny dwarf planets at the edge of our Solar System. The veteran telescope keeps a watchful eye on our solar backyard.
Regarded by many as the most valuable astronomical tool, the Hubble Space Telescope is approaching its 19th anniversary in space. Hubble sees into the far reaches of the universe but its powerful instruments have also surveyed our planetary neighbours. In this episode, well see what Hubble has revealed to us in our own solar backyard.
Even those who, for some strange reason, arent astronomy enthusiasts are likely to recognise some of Hubbles most famous images, like the “Pillars of Creation”in the Eagle Nebula or the Hubble Deep, and Ultra Deep, Fields which have shown us some of the most distant galaxies ever observed. The Hubble Space Telescope has really fundamentally changed our understanding of the Universe at large, but with its high resolution images of planets and moons in our own Solar System, it has also taught us a lot about our own cosmic neighbourhood.
Hubble cannot observe our Sun, or the closest planet, Mercury, because its instruments are light-sensitive and would be damaged. However, the telescope has examined every other planet in the solar system, including dwarf planets Pluto, Ceres and Eris. But, of course, Hubble does not just produce pretty pictures, it provides planetary scientists with vital information about our neighbours that may help us better understand our own home planet, Earth.
More (PDF): http://www.spacetelescope.org/videos/scripts/hubblecast27a.pdf
Credits:
• ESA/Hubble (Martin Kornmesser, Colleen Sharkey & Lars Lindberg Christensen)
• Visual design & Editing: Martin Kornmesser
• Animations: Martin Kornmesser
• Host: Dr. J
• Narration: Robert Fosbury
• Cinematography: Peter Rixner
• Music: movetwo
• Web Hosting: Leibniz-Rechenzentrum (LRZ)
• Web Technical Support: Lars Holm Nielsen & Raquel Yumi Shida
• Written by: Lars Lindberg Christensen
• Directed by: Colleen Sharkey
• Additional photos and footage: United States Air Force photo by Senior Airman Joshua Strang, NASA-JPL/ESA, NASA/JHU/APL,
Dr. J is a German astronomer at the ESO. His scientific interests are in cosmology, particularly on galaxy evolution and quasars. Dr. J’s real name is Joe Liske and he has a PhD in astronomy.
Hubble European Space Agency Information Centre
Garching/Munich, Germany
• http://www.eso.org
• http://www.spacetelescope.org
• http://hubblesite.org
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Duration : 0:6:44
***READ THIS BEFORE ASKING ANYTHING***
This is the ultimate size comparison video that you can find on the internet in HD.
Starts with the tinyest dwarf planets of our solar system, then continues with large planets, dwarf stars, stars giant/supergiant/hypergiant stars, nebulae, globular clusters and galaxies.
There is the famous VY Canis Majoris rated as the biggest star known, but very few know that that the incredible IC 1101 is the largest known object in the entire universe. Only galaxy clusters are bigger than it.
Hope you enjoy this one.
FAQ:
-Sizes are not 100% accurate as there is no way to directly measure them.
-Star sizes may change in the future, and new stars may eventually appear into this biggest stars list
-Song: Celtic Panpipes – Ride on
Duration : 0:4:0
We’ve never seen them directly, yet we know they are there, lurking within dense star clusters or wandering the dust lanes of the galaxy, where they prey on stars, or swallow planets whole. Our Milky Way may harbor millions of these black holes, the ultra dense remnants of dead stars. But now, in the universe far beyond our galaxy, there’s evidence of something even more ominous: a breed of black holes that have reached incomprehensible size and destructive power. How big can they get? What’s the largest so far detected? Where does an 18 billion solar mass black hole hide?
Duration : 0:18:48