The observable universe is vast, extending about 93 billion light-years across, containing galaxies, stars, planets, and all ...

Moving on further in time, the universe is filled with a strange substance called quark-gluon plasma. As the name suggests, ...

Current interpretations of astronomical observations indicate that the age of the Universe is 13.73 (± 0.12) billion years, and that the diameter of the observable Universe is at least 93 billion ...