Describes the Universe as an oscillating universe in which a 'cosmic egg' or Brahmanda, containing the whole universe

He believed in a primordial universe and explained that the original state of the cosmos was a primordial mixture of all its ingredients small fragments of themselves

They believed in an atomic universe

They believed that the universe is like a giant living body, with the sun and the stars as the most important parts to which everything else was interconnected.

They believed that the universe was composed of very small, indivisible, and indestructible atoms.

They proposed a geocentric universe where Earth stayed in motionless in the heavens and everything is revolving around it

He demonstrated that the motions of celestial objects can be explained without putting Earth in the center of the universe

He describe the universe, matter on the large scale is uniformly distributed, and the universe is gravitationally balanced but essentially unstable

According to him, the vacuum of space was not empty at all but was filled with matter that swirled around in large and small vortices. His model involved a system of huge swirling whirlpools of fine matter, producing gravitational effects

The universe is expanding and originated in an infinitely tiny, infinitely dense point around 14 billion years ago.

Matter was not present at the beginning of time, there was only pure energy compressed in a single point called singularity

This curvature results in the expansion of the universe for a time, and then to its contraction due to the pull of its gravity in a perpetual cycle of big bang and big crunch

This theory predicted a universe that expanded but did not change its density-matter was inserted into the universe as it expanded in order to maintain a constant density

breaks down an atom's nucleus and produce radioactive decay