The universe is all of space and time [a] and their contents. [9] It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of matter and energy, and the structures they form, from sub-atomic particles to entire galactic filaments. Since the early 20th century, the field of cosmology establishes that space and time emerged ...

6 days ago · The spiral galaxy is host to two perfect examples of Type Ia supernovae which happen in two-star systems when one of the stars is a white dwarf. These types of blasts are like cosmic mile markers that help scientists measure the universe’s expansion and explore mysteries like dark energy. Learn More about Hubble Surveys Supernova-Rich Spiral

Aug 12, 2025 · universe, the whole cosmic system of matter and energy of which Earth, and therefore the human race, is a part. Humanity has traveled a long road since societies imagined Earth, the Sun, and the Moon as the main objects of creation, with the rest of the universe being formed almost as an afterthought.

Sep 4, 2025 · The universe exists because matter and antimatter are not good friends.

The universe is filled with an amazing variety of celestial objects. Find out about astronomy through history, how we understand the sky, constellations, sky maps and stars, exoplanets, galaxies, and strange stuff - like neutron stars and black holes. Learn about cosmology, and the history of the universe!

The universe is all the matter, energy, and space that exist. We can observe only a part of it - the observable universe.

May 3, 2022 · The universe is literally everything, the sum of all existence. It includes all matter, like stars and galaxies. The universe also includes all radiation and all other forms of energy. No matter ...

Oct 22, 2024 · The Universe’s History The origin, evolution, and nature of the universe have fascinated and confounded humankind for centuries. New ideas and major discoveries made during the 20th century transformed cosmology – the term for the way we conceptualize and study the universe – although much remains unknown. Here is the history of the universe according …

The meaning of UNIVERSE is the whole body of things and phenomena observed or postulated : cosmos. How to use universe in a sentence.

The current accepted model of the history of the universe is based on the concept of the Big Bang: the universe started hot and dense then expanded and cooled. Different particles interact during each major stage in the expansion; as the universe expands the density falls and some particle interactions cease to be important. The character of the universe changes. Moreover, …