about dark energy and dark mass?

there is NO SUCH THING as dark energy

there is NO SUCH THING as dark mass

Is it true that the missing mass in the universe has been found? -- yes , but...

missing mass has NOTHING to do with dark matter. COMPLETELY unrelated.

there is NO SUCH THING as "missing dark energy".

Some missing NORMAL matter was found, which accounts for a very small percentage of the dark matter, but it's a VERY small percentage. Dark energy is an entirely different thing from dark matter. Dark matter and dark energy are PROBABLY interchangeable like normal matter and energy are interchangeable, according to E= mc^2.

watch this movie: Most of our universe is missing.

indeed most of our universe is missing and scientists are struggling on this, this dark energy/matter is really mysterious

There is indeed condensed packages of matter that have been found in certain regions of space. There's also theories that a proportion of the missing matter could be credited to hard-to-observe stuff, e.g. brown dwarfs.

dark energy :-In physical cosmology, astronomy and celestial mechanics, dark energy is a hypothetical form of energy that permeates all of space and tends to increase the rate of expansion of the universe.[1] Dark energy is the most accepted theory to explain recent observations that the universe appears to be expanding at an accelerating rate. In the standard model of cosmology, dark energy currently accounts for 73% of the total mass-energy of the universe.[2]

Two proposed forms for dark energy are the cosmological constant, a constant energy density filling space homogeneously,[3] and scalar fields such as quintessence or moduli, dynamic quantities whose energy density can vary in time and space. Contributions from scalar fields that are constant in space are usually also included in the cosmological constant. The cosmological constant is physically equivalent to vacuum energy. Scalar fields which do change in space can be difficult to distinguish from a cosmological constant because the change may be extremely slow.

High-precision measurements of the expansion of the universe are required to understand how the expansion rate changes over time. In general relativity, the evolution of the expansion rate is parameterized by the cosmological equation of state (the relationship between temperature, pressure, and combined matter, energy, and vacuum energy density for any region of space). Measuring the equation of state for dark energy is one of the biggest efforts in observational cosmology today.

Adding the cosmological constant to cosmology's standard FLRW metric leads to the Lambda-CDM model, which has been referred to as the "standard model" of cosmology because of its precise agreement with observations. Dark energy has been used as a crucial ingredient in a recent attempt to formulate a cyclic model for the universe.[4]

A recent survey of more than 200,000 galaxies appears to confirm the existence of dark energy, although the exact physics behind it remains unknown

dark mass- In astronomy and cosmology, dark matter is matter that is inferred to exist from gravitational effects on visible matter and background radiation, but is undetectable by emitted or scattered electromagnetic radiation.[1] Its existence was hypothesized to account for discrepancies between calculations of the mass of galaxies, clusters of galaxies and the entire universe made through dynamical and general relativistic means, and calculations based on the mass of the visible "luminous" matter these objects contain: stars and the gas and dust of the interstellar and intergalactic medium. It is probably cold and if so, probably weakly interacting massive particles[2][3] or many primordial intermediate mass black holes between 30 and 300,000 solar masses,[4][5] or both.

According to observations of structures larger than solar systems, as well as Big Bang cosmology interpreted under the Friedmann equations and the FLRW metric, dark matter accounts for 23% of the mass-energy density of the observable universe. In comparison, ordinary matter accounts for only 4.6% of the mass-energy density of the observable universe, with the remainder being attributable to dark energy.[6][7] From these figures, dark matter constitutes 83%, (23/(23+4.6)), of the matter in the universe, while ordinary matter makes up only 17%.

Dark matter was postulated by Fritz Zwicky in 1934 to account for evidence of "missing mass" in the orbital velocities of galaxies in clusters. Subsequently, other observations have indicated the presence of dark matter in the universe; these observations include the rotational speeds of galaxies, gravitational lensing of background objects by galaxy clusters such as the Bullet Cluster, and the temperature distribution of hot gas in galaxies and clusters of galaxies.

Dark matter plays a central role in state-of-the-art modeling of structure formation and galaxy evolution, and has measurable effects on the anisotropies observed in the cosmic microwave background. All these lines of evidence suggest that galaxies, clusters of galaxies, and the universe as a whole contain far more matter than that which interacts with electromagnetic radiation. The largest part of dark matter, which does not interact with electromagnetic radiation, is not only "dark" but also, by definition, utterly transparent

http://universemass.blogspot.com/