In the united states, work on a marginal of the universe has begun in unprecedented quality. Within five years, the dark energy spectroscopic instrument (desi) on the kitt peak national observatory in arizona is now analyzing the light of 30 million galaxies and create the kosmos 3d map previously prepared so far. Thus, among other things, the responsible persons want to track the most mysterious dark energy, which is made responsible for the accelerated extent of the universe. The 3d card is to extend to us from us near the universe to galaxies in 11 billion light years.
Why accelerates the spread of the universe?
After the beginning of the 20. For centuries, among others, edwin hubble had been demonstrated that the universe expanded, research has long been amed that this expansion slows down. Only in 1998 was then discovered by the analysis of distant supernovae that the expansion is even accelerated on the contrary. Dafur got the us scientists saul perlmutter, brian schmidt and adam riess 2011 the nobel prize for physics. In physics, since then, the so-called dark energy is responsible for this acceleration. Their nature is still advisable. The experiment desi should now bring light into the dark.
Like those responsible, do not put on the big telescopes in their work, but for better instruments and more powerful software. Your instrument is installed at the kitt peak national observatory sudwest of tucson in the us state of arizona. Thanks to robot-controlled glass fibers, it can capture the spectra of 5000 galaxies at the same time and so in a good night up to 150.000 objects measured, explain the responsible persons. From the spectra, researchers can then conclude not only on the chemical composition of the radiant objects, but also on their relative distance and self-movement. From this you can succumb to the extensive map of the expanding universe at the end.
Examples of the functioning of desi
a small, but particularly dense sky cutting ..
The desi now has on the 17th. May start his central task, but before it has collected a lot of data in test runs. The goods already founded for other research, for example in the search for so-called gravitational lenses. Most recently, the dark energy spectroscopic instrument had proven its commitment with the so-called one-percent screening, which analyzed one percent of the planned sky flax under the conditions of use. Alone the instrument has already become the world’s second-gray collector of data on the redshift cardier, so the mab of her movement away from us, paul martini had explained from desi.
Erlfilm to the desi erklarfilm to the desi (source: berkeley lab)