Pier Paolo shared an awesome 3D project titled Universal. In times of misinformation and science denial he decided to use his tools to help spreading scientific knowledge and perhaps make more people curious about these topics. "UNIVERSAL" is a self-initiated project exploring concepts of physics and science.
“The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself.” - Carl Sagan
Einstein`s general theory of relativity explains gravity as a distortion of spacetime caused by the presence of matter or energy.
A region of spacetime where gravity is so strong that nothing - no particles or even electromagnetic radiation such as light - can escape from it.
In the center of a black hole is a gravitational singularity, a one-dimensional point which contains a huge mass in an infinitely small space, where density and gravity become infinite and space-time curves infinitely, and where the laws of physics as we know them cease to operate.
Expansion of the Universe
Galaxies are receding away from us with a velocity that is proportional to their distance from us: more distant galaxies recede faster than nearby galaxies.
Andromeda is a barred spiral galaxy approximately 2.5 million light-years from Earth and the nearest major galaxy to the Milky Way. It’s also the most distant thing visible to your unaided eye.
A gravitational lens can occur when a huge amount of matter, like a cluster of galaxies, creates a gravitational field that distorts and magnifies the light from distant galaxies that are behind it but in the same line of sight. The effect is like looking through a giant magnifying glass.
Gravity bending light
Spacetime gets bent due to large masses, which also affects light trajectory.
The multiverse theory is a group of models assuming that our physical reality encompasses more than one universe.
When light travels through space its wavelength gets stretched due to the universe expansion. This causes a shift to the red part of the spectrum.
Spacetime is a conceptual model combining three dimensions of space with the fourth dimension of time.
A speculative structure linking disparate points in spacetime.
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