What is dark energy? The time is right for a critical assessment of dark energy and the cosmological constant. Cosmology draws on many branches of physics to study the universe's history. It is of great interest thus to write a review on the dynamical properties of several dark energy models. As Fig. 1 shows, the current best estimates of the universe’s composition (5–8) suggest that dark energy, dark matter, atoms, three different types of neutrinos, and photons all make an observable contribution to the energy density of the universe. Cosmology - Dark Energy - The area of Dark Energy is a very grey area in astronomy because it is a free parameter in all equations, but there is no clear idea what exactly this is. Dark Energy Part 2: LCDM Cosmology April 21, 2020 / 0 Comments / in Physics Articles / by Mark Stuckey This is Part 2 of a 3-part series explaining evidence for so-called “dark energy” leading to a current positive cosmological acceleration. The search for dark energy has proven useful to other types of research, too. While no one knows yet what dark energy is or is caused by, all evidence and data suggest it is a real phenomenon. More is unknown than is known — we know how much there is, and we know some of its properties; other than that, dark energy is a mystery — but an important one. Dark Energy & Cosmology: Home; ... and it is this coercive interaction that comprises the so-called mysterious Dark Energy that fills the universe. DES has discovered new supernovae and quasars, and its colored views have helped confirm ASAS-SN observations. Dark energy is now thought to make up 68% of everything in … On the one hand, dark energy is an important subject of modern cosmology, with forthcoming astronomical observations which will possibly provide an increasing amount of information about its fundamental nature. while the mystery surrounding the accelerating expansion of the Universe persists, modern cosmology … Entering a New Era of Dark Energy Cosmology January 3, 2020 • Physics 13, 1 The first of a new generation of experiments aiming to shed light on the mysterious dark energy will start collecting data early this year. And what it's found has forever changed how we understand our position in the cosmos. Prior to the discovery that the expansion of the Universe is actually accelerating, astronomers had thought that the expansion should be slowing under the mutual gravitational attraction of galaxies. Roughly 70% of the Universe is made of dark energy. Cosmology is the study of the origin and fate of the Universe. 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