Are Form 8865 Acceleration 2023-2024

Everyone, my name is Brian Schmidt, and today I'm going to tell you about the accelerating universe. Now, the accelerating universe is not just my own story, it is a story about cosmology and the hundred years of development over the past century. Let's first start with a tour of the universe. The first thing I want to say is that the universe is big. To understand just how big, we're going to use the speed of light as our tour guide. The fact is, light travels 300,000 kilometers per second, which is seven and a half times around the Earth each second. For example, when Neil Armstrong took his one small step, we found out about it one and a half seconds after that event occurred. The radio waves from his voice were transported right down the road here at Hunting Creek and then transported around the world. You may not realize it, but the Sun is five light seconds across, much bigger than the Earth-Moon system. The reason the Sun appears small in the sky is because it's so far away, about eight light minutes in distance. Our Sun is only one of many stars in the sky. The nearest star system is Alpha Centauri, which is a star not dissimilar to our own Sun. I want you to imagine it being a pea if it were a pea and sitting here in my hand. If we think of the Sun being another pea, where would the Sun have to be to be the right scale? Well, about Sydney, 270 kilometers away. Everything in between is empty space, and that's why we call it space. If we look out to our own galaxy, we see that our Sun is about 30,000 light years from the center. Our Sun is...