The Astonishing Nature of Space and Time

🌌Space is a colossal, ever-expanding container filled with celestial objects like stars, planets, black holes, and cosmic dust.

⏳Time moves forward and is influenced by our position and motion in the universe. It is not absolute and can be relative.

🌍The shape of the universe is flat and much larger than what we can see. It is expanding and we always see the glow of the Big Bang.

🌀Our perception of space and time is relative and dependent on our perspective, motion, and position in the universe.

📐By looking at the most distant light in the universe, we can measure the flatness and curvature of space and infer its properties.

What is space?

—Space is a colossal, ever-expanding container filled with celestial objects like stars, planets, black holes, and cosmic dust.

How does time work in relation to space?

—Time moves forward and is influenced by our position and motion in the universe. It is not absolute and can be relative.

What is the shape of the universe?

—The shape of the universe is flat and much larger than what we can see. It is expanding and we always see the glow of the Big Bang.

Is space and time absolute?

—No, our perception of space and time is relative and dependent on our perspective, motion, and position in the universe.

How do we measure the properties of space?

—By looking at the most distant light in the universe, we can measure the flatness and curvature of space and infer its properties.

00:00Throughout history, perspectives on absolute space and time have evolved. The cosmos is an ever-expanding container filled with celestial objects.

02:35The Greeks believed the Earth was the center of the universe, but it is actually our perception that makes it feel that way.

04:21Einstein's theory of general relativity shows that there is no such thing as absolute space, and our motion determines our perspective.

06:21Our solar system has moved to different parts of the Milky Way throughout history. Dinosaurs roamed the Earth in a different cosmic location.

08:03Time moves forward, and the arrow of time is influenced by the expansion of the universe and the second law of thermodynamics.

09:13The dimensionality of space-time entails a third dimension of space. We can measure the curvature and flatness of space by studying distant light.

10:30By observing the oldest light in the universe, we can study the curvature and warping of space caused by the stuff within it.

10:58The shape of the universe is flat, and it appears flat because it is much larger than what we can currently observe.