What is the difference between an open and closed universe?

The closed universe, which is a universe where space-time is curved back on itself, one that has a finite size but no center and no edge. The open universe, which is a model of an infinite universe involving curved space-time, which does not curve back on itself.

What does it mean when they say the universe is flat?

All other cosmological data suggests the universe is flat, meaning it has no curvature, similar to a sheet of paper. These Planck measurements indicate that it could be “closed”, or spherical, which would mean that if you travelled far enough in one direction, you would end up back where you started.

Is the universe really flat?

The exact shape is still a matter of debate in physical cosmology, but experimental data from various independent sources (WMAP, BOOMERanG, and Planck for example) confirm that the universe is flat with only a 0.4\% margin of error.

Is the universe friendly?

Albert Einstein is said to have remarked that the single most important decision any of us will ever make is whether or not to believe that the universe is friendly. What’s remarkable about these words is that they come from one of the most brilliant scientists who ever lived.

Is the universe telling you where you need to go?

You might feel at times as if you’re a newspaper caught up in the wind, being blown about with no clear direction. But if you start paying attention, you will realize that the universe is sending you signals all the time that show you where you need to go and what you need to do to create the life of your dreams.

Why is it so important to pay attention to signs from the universe?

It is constantly working to make available to you the tools, the resources, the people, and the lessons you need to become the person you were meant to be which is why it’s so important to pay attention to signs from the universe. But, the universe doesn’t always make these things totally obvious, or even always easy.

Why didn’t Einstein prove that the world is unfriendly?

Because, I believe, Einstein knew that for every example of the world being unfriendly, you can find an equally compelling example of its being friendly. It is impossible to prove or disprove this particular theory. In the absence of proof, all we are left with is belief. And belief is a choice.