Tag

Curvature

All articles tagged with #curvature

Why the Earth Appears Flat Despite Its Round Shape
science1 year ago

Why the Earth Appears Flat Despite Its Round Shape

The Earth appears flat to us because we are small creatures living on a vast sphere, making it difficult to perceive its curvature from the ground. Our eyes can only see a limited horizon, about 3 miles, which isn't enough to notice the Earth's roundness. To see the curvature, one must be at a high altitude, like in a plane or from space. Additionally, Earth is not a perfect sphere but an oblate spheroid, slightly wider at the equator due to its rotation.

"Unlocking the Secrets of the Universe: Exploring Alternate Cosmology in a Lab"
science-and-technology2 years ago

"Unlocking the Secrets of the Universe: Exploring Alternate Cosmology in a Lab"

Researchers in Germany have created a tabletop quantum field simulation to explore possible features of the early Universe shortly after the Big Bang. By using magnets and lasers to control a sample of potassium-39 atoms held close to absolute zero, they were able to simulate a Universe with different curvatures. The experiment involved trapping the atoms in a two-dimensional layer and cooling them to a quantum-mechanical state known as a Bose-Einstein condensate. The results showed that it is possible to simulate spatially curved and expanding spacetimes, providing insights into the behavior of the early Universe.