Does anyone want to talk about outer space?
I was watching the video before I saw your message, because I was trying to find something. He is on a beach, that’s correct.
Yes, I saw a video where Cox explained that and showed with his hands how it really looks like. The video was taken on a beach.
The Earth and the moon are both orbiting around a point called the common centre of mass. One of the forces that are involved in this orbit is called the centrifugal force, which is like the force when you are holding onto a roundabout and it is spinning faster and faster, trying to throw you off.
the moon pulls the earth one way, because of its gravitational pull, and the earth is being pulled another way, from the centrifugal force. This makes a bulge on both sides of the earth, a tidal bulge.
the earth rotates, once a day on it’s axis, underneath the bulge of the oceans, and that is why we get two tides.
My favourite scientists are Neil Tyson DeGrasse and Brian Cox. I love listening and reading. It's fascinating, how the stars and star systems form and how the big stars end their lives throwing heavy elements to the space. I also heard a theory, that we are living in a black hole that is being hosted by another, bigger universe. Thus way a multiverse could be infinite.
Yes I also heard about it its fascinating!
The helix is 655 light years from our solar system, it’s the closest nebula. A stellar graveyard.
the white dwarf is currently burning at 120,000 degrees celsius, and surrounding it are 40,000 gas clouds, each cloud has a total diameter of twice the total diameter of our solar system.
it is, like nebula are, beautiful.
You've set it playing in my head now with mention of black holes 
I always think about redshift in the way that you said about the balloon.
and that is interesting what you said about 2 Dimensional space, only being able to travel on the x or y axis, being no z, because it is 2D space. No edge, which way that you walk, in a straight line, you end up back in the same place.
but we are stuck, as humans, in this current period of time, with figuring out what it means to be in 3 Dimensional space.
Black holes are so interesting to learn about, and you can think about these ideas when learning and putting thought into what a black hole is (just don’t think about it too much because you will not be able to escape the event horizon).
Something which can be so dense that it becomes not only something which warps space and time, but still after years of thinking about them, along with so many things, we are unable to comprehend at what scale we are dealing with.
I'm not sure how valid a theory/representation it is or where I even heard it, but I remember a description of space being like the surface of a balloon. From a 2 dimensional perspective there is no edge. You can take any point on the balloon, pick a direction, and you'll eventually travel back to the same point.
So for 3 dimensional space, you could start anywhere, pick a direction to travel, and eventually could end up back in the same place you started.
It also works to visualise the expansion of the universe. You can inflate the balloon and the points get further away. From a 2 dimensional perspective, it's not expanding into anything. It's only when you add the 3rd dimension that becomes apparent.
I really enjoy the topic and find it fascinating. I really like watching Brian Cox too and there is an interesting channel he has where he talks about the subject.
what really boggles my mind is when you think about the vastness of space. Where does it end? Or does it? Why? I ponder these things often. I recently bought a Dobsonian 8” telescope too.
what’s something that really makes you stop and think when talking about this subject?
It's great fun when you manage to see the international space station!
The brightest star in the night sky is called Sirius. It is 8.6 light years away, 56 billion kilometres.
If you see a really bright star, that’s probably Venus, which many people (also famously Richard Nixon) mistake for a star.
It's a bit of a big topic and a bit out there too, lol.
Sorry I couldn't resist that, I dont' know enough about it to be able to talk about, I like looking at the sky when its clear though.
