Mar 24, 2025 · This article traces the development over time of humanity’s perception of the universe, from prehistoric observations of the night sky to modern calculations on the …

The universe is also called the cosmos. Cosmology is the branch of science that studies the universe as a whole. It brings together the natural sciences, particularly astronomy and …

Feb 21, 2025 · Expanding universe, dynamic state of the extragalactic realm, the discovery of which transformed 20th-century cosmology. The development of general relativity and its …

Mar 21, 2025 · Astronomy - Cosmology, Universe, Stars: Cosmology is the scientific study of the universe as a unified whole, from its earliest moments through its evolution to its ultimate fate. …

Mar 10, 2025 · Science, any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation. In …

Mar 19, 2025 · Space exploration - Astronomy, Technology, Discovery: In the decades following the first Sputnik and Explorer satellites, the ability to put their instruments into outer space …

The universe is everything that exists, including objects and energy, throughout time and space. Earth, the Sun, and the rest of the solar system are only a very small part of the universe. The …

Mar 23, 2025 · Cosmology, the field of study that brings together the natural sciences, particularly astronomy and physics, in a joint effort to understand the physical universe as a unified whole. …

Mar 21, 2025 · Astronomy, science that encompasses the study of all extraterrestrial objects and phenomena. Since the late 19th century, astronomy has expanded to include astrophysics, the …

Feb 7, 2025 · Observable universe, the region of space that humans can actually or theoretically observe with the aid of technology. The observable universe, which can be thought of as a …