Thursday, April 3, 2014

C is for Cosmology

Fun Facts (at least fun theories) about our cosmos:
 
The Universe spans a diameter of over 150 billion light years.
 
There Are at Least 10 Billion Trillion Stars in the Universe
 
Our Galaxy Is on a Collision Course with the Andromeda Galaxy
 
The Earth is not flat – but the Universe is not. Based on Einstein’s Theory of General Relativity, there are three possible shapes that the Universe may take: open, closed, and flat. Once again, measurements by WMAP on the CMBR have revealed a monumental confirmation – the Universe is flat.
 
There is no such thing as the Universe’s center. Every galaxy is expanding away from one another.
Even When You’re Standing Still, You’re Still Moving. A human body, or any object on the Earth, is never at rest. Even when you’re asleep in bed, you’re moving pretty fast. Our Milky Way Galaxy is rotating at 225 kilometers per second, and hurling through the cosmos at an estimated 305 kilometers per second.
 
Add those figures together, and we’re racing through space at around 530 kilometers, or 330 miles per second. So in one minute’s time, you’ve traveled almost 20,000 kilometers, or more than 12,000 miles. And your friends always complain that you never go anywhere.
 
There May Be More Universes: The idea that we live in a multiverse, in which our universe is one of many, comes from a theory called eternal inflation, which suggests that shortly after the Big Bang, space-time expanded at different rates in different places.
 
According to the theory, this gave rise to bubble universes that could function with their own separate laws of physics.
 
At the center of the Milky Way Galaxy, there is a black hole millions of times the mass of the most massive object in the solar system, the Sun.
You Are Here. Now you Know.
 
Cosmology Trivia: Our Earth travels around the sun at a speed of about 18.5 miles a second and is held in orbit by our sun’s gravitational effect on it. If the sun ceased to exist at this very moment, along with its gravitational grip on our planet, how long would it take Earth to zing straight off into space?
 
Answer in tomorrow’s post D is for Dreams