Search results
Results from the WOW.Com Content Network
The Wilkinson Microwave Anisotropy Probe (WMAP) spacecraft seven-year analysis estimated a universe made up of 72.8% dark energy, 22.7% dark matter, and 4.5% ordinary matter. [4] Work done in 2013 based on the Planck spacecraft observations of the cosmic microwave background gave a more accurate estimate of 68.3% dark energy, 26.8% dark matter ...
Dark matter regularly appears as a topic in hybrid periodicals that cover both factual scientific topics and science fiction, [180] and dark matter itself has been referred to as "the stuff of science fiction". [181] Mention of dark matter is made in works of fiction.
The fraction of the total energy density of our (flat or almost flat) universe that is dark energy, , is estimated to be 0.669 ± 0.038 based on the 2018 Dark Energy Survey results using Type Ia supernovae [8] or 0.6847 ± 0.0073 based on the 2018 release of Planck satellite data, or more than 68.3 % (2018 estimate) of the mass–energy density ...
On a mass–energy equivalence basis, the density of dark energy (~ 7 × 10 −30 g/cm 3) is much less than the density of ordinary matter or dark matter within galaxies. However, in the present dark-energy era, it dominates the mass–energy of the universe because it is uniform across space.
The universe's contents include ordinary matter - stars, planets, gas, dust and all the familiar stuff on Earth, including people and popcorn - as well as dark matter, which is invisible material ...
To make that assumption work, astronomers have used the concept of dark energy. For a century, scientists have thought that the universe was expanding in all directions.
Based on the 2013 data, the universe contains 4.9% ordinary matter, 26.8% dark matter and 68.3% dark energy. On 5 February 2015, new data was released by the Planck mission, according to which the age of the universe is 13.799 ± 0.021 billion years old and the Hubble constant was measured to be 67.74 ± 0.46 (km/s)/Mpc .
The authors said that if a particular set of parameters is true, we should be able to observe a certain kind of dark matter within Earth’s ionosphere. That dark matter is not completely dark, as ...