What is dark energy? Cosmology is the study of the origin and fate of the Universe. It is of great interest thus to write a review on the dynamical properties of several dark energy models. Roughly 70% of the Universe is made of dark energy. The time is right for a critical assessment of dark energy and the cosmological constant. 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. Dark matter makes up about 25%. The majority of the universe is made up of a currently mysterious entity that pervades space: dark energy. Astronomical observations and cosmological theory suggest that the composition of the universe is remarkably rich and complex. while the mystery surrounding the accelerating expansion of the Universe persists, modern cosmology … 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. The search for dark energy has proven useful to other types of research, too. And what it's found has forever changed how we understand our position in the cosmos. DES has discovered new supernovae and quasars, and its colored views have helped confirm ASAS-SN observations. What is dark energy? 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. 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. 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. Cosmology draws on many branches of physics to study the universe's history. 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. While no one knows yet what dark energy is or is caused by, all evidence and data suggest it is a real phenomenon. 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