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Rainer Scherg
Lives in Milchstr., Sol-System, Erde, Deutschland, http://127.0.0.1
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Rainer Scherg

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The Big Crunch is one of the scenarios predicted by scientists in which the Universe may end. Just like many others, it is based on Einstein’s Theory of General Relativity. That is, if the Big Bang describes how the Universe most possibly began, the Big Crunch describes how it will end as a consequence of that beginning.
It tells us that the Universe’s expansion, which is due to the Big Bang, will not continue forever. Instead, at a certain point in time, it will stop expanding and collapse into itself, pulling everything with it until it eventually turns into the biggest black hole ever. Well, we all know how everything is squeezed when in that hole. Hence the name Big Crunch.
For scientists to predict with certainty the possibility of a Big Crunch, they will have to determine certain properties of the Universe. One of them is its density. It is believed that if the density is larger than a certain value, known as the critical density, an eventual collapse is highly possible.
You see, initially, scientists believed that there were only two factors that greatly influenced this expansion: the gravitational force of attraction between all the galaxies (which is proportional to the density) and their outward momentum due to the Big Bang.
Now, just like any body that goes against gravity, e.g. when you throw something up, that body will eventually give in and come back down for as long as there is no other force pushing it up.
Thus, that the gravitational forces will win in the end, once seemed like a logical prediction. But that was until scientists discovered that the Universe was actually increasing its rate of expansion at regions farthest from us.
To explain this phenomena, scientists had to assume the presence of an unknown entity, which they dubbed ‘dark energy’. It is widely believed that this entity is pushing all galaxies farther apart. With dark energy, and what little is known about it, in the picture, there seems to be little room for the possibility of a Big Crunch.

#physics   #science  
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Rainer Scherg

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Ein langer Star Trek-Tag ist fast zu Ende...

Von allen Schauspielern der Serien und der Filme ist als einziger James
"Scotty" Doohan im Orbit gelandet.
Mit einer Dragon, die heute erfolgreich ins All gestartet ist
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Mit dem ersten privaten Raumflug wurden 300 Urnen im Orbit bestattet – darunter die von "Scotty", dem Chefingenieur aus "Star Trek". Lebende Menschen müssen auf einen Flug mit der "Dragon" warten.
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es gibt aber cross updates zu nexthusband 2.0
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Apply for the hardest job of the world...
 
Eine Fake-Jobagentur gab das Inserat für den wohl unmöglichsten Job der Welt aus: Als "Director of Operations", mit mindestens 135 Stunden Arbeit pro Woche, ohne Urlaub, ohne Bezahlung. Die Auflösung des Videos ist jedoch interessant und betreffend zugleich:
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Sir Roger Penrose: An Alternate Theory of the Big Bang?

Is it possible that there has been more than one big bang? Could it be that our universe has experienced an on-going cycle of big bangs? One scientist thinks so, and even says that he has evidence to support his cause.

Learn about this controversial theory at:
http://goo.gl/rT8elE


Original image source MIA. Can you help us find the artist?
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Is There a Limit to How Large a Star Can Be?

Thanks to stars like "VY Canis Majoris" and "HR 517S," we know that the universe is inhabited with stars that are so large, they bring our notions of stellar evolution into question.

Some are so big, they could easily engulf our entire solar system. But how large CAN a star grow to be ? Is there any type of a maximum limit for such growth? Find out at:
http://goo.gl/KQWJqV

Image Credit: WIkimediaCommons
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Riverdance... 😂
 
Von wegen Tanzverbot  ;)
Via +Ruthe.de "drüben"
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Rainer Scherg

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Gute Frage...
... was passiert, wenn 2 Schwarze Löcher miteinander kollidieren? Insbesondere was passiert, wenn die 2 Ereignishorizonte aufeinander treffen? Würde die Kollision ewig dauern?
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Colliding Black Holes:

Can black holes pull matter out of each other? That would be really cool, but it doesn't quite work that way.
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As time goes by...
... als die Bits&Bytes noch handverlesen in Kilo gemessen wurden.
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Das Byte-Magazin hat schon 1981 die Smartwatch prophezeit. Natürlich mit Floppy-Disk. :)  (sw)

via http://time.com/60505/this-1981-computer-magazine-cover-explains-why-were-so-bad-at-tech-predictions/
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In Zukunft wird es weniger Lebensmittelskandale geben! 

Wir werden von ihnen nämlich erst gar nicht erfahren, jedenfalls, wenn sich die EU-Kommission mit einem Gesetzentwurf durchsetzt. Sie plant eine umfassende "Geheimhaltungspflicht" für Lebensmittelkontrollbehörden, die Informationen dann noch seltener als bislang an die Öffentlichkeit weiter geben könnten. Zum Beispiel dann nicht, wenn wenn dies „den Schutz der geschäftlichen Interessen“ von Unternehmen „beeinträchtigen“ würde, so dass das öffentliche Interesse hinten an steht... Am Montag wird das EU-Parlament darüber debattieren. 

Bitte teilt diese Info, damit dieses Gesetz nicht einfach geräuschlos verabschiedet wird! 
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