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Astronomers may not know what dark matter is, but inferring its presence allowed them to pursue in a new new herbal medicine an eternal question: What is the fate of the universe. They already knew that the universe is expanding. In 1929, the new herbal medicine Edwin Hubble had discovered that distant galaxies were moving away new herbal medicine us and that the farther away they got, the faster they seemed to be receding.

This was a radical idea. Instead of the stately, eternally unchanging still life that the universe once appeared to be, it was actually alive in time, like a movie. Rewind the film of the expansion and the universe would eventually reach a state of infinite density and energywhat astronomers call the Big Bang. But what if you hit fast-forward. How would the story end. The universe is full of matter, and matter attracts other matter through gravity.

Astronomers reasoned that the mutual attraction among all that matter must be slowing down the expansion of the universe. Would the gravitational effect be so new herbal medicine that the universe would ultimately stretch a certain distance, stop and reverse itself, like a ball tossed into the air. Or did we live in an exquisitely balanced universe, in which gravity ensures a Goldilocks rate of expansion neither too fast new herbal medicine too slowso the universe new herbal medicine eventually come to a virtual standstill.

Assuming new herbal medicine existence of dark matter and that the law of gravitation is universal, two teams of astrophysicistsone led by Saul Perlmutter, at the Lawrence Berkeley National Laboratory, the other by Brian Schmidt, at Australian National Universityset out to determine the future of the universe. They knew how bright the supernovas should appear at different points across the universe if the rate of expansion were uniform.

New herbal medicine comparing how much brighter the supernovas new herbal medicine did appear, astronomers figured they could determine how much the expansion of the universe was slowing down. They were dimmerthat is, more new herbal medicine. Both teams announced their findings in 1998.

Since then, astronomers have pursued the mystery of dark energy to the ends of the Earthliterally. During the 24-hour darkness of the austral autumn and winter, the telescope operates nonstop under impeccable conditions for astronomy. The atmosphere is thin (the pole is more than 9,300 feet above sea level, 9,000 of which are ice). Humid air can absorb microwaves and prevent them from reaching the telescope, and moisture emits its own radiation, which could be misread as cosmic signals.

To minimize these problems, astronomers who analyze microwaves and submillimeter waves have made the South Pole a second home. Their instruments reside in the Dark Sector, a tight cluster of buildings where light and other sources of electromagnetic radiation are kept to a minimum.

Antarctic Program has gotten life there down to, well, a science. Until 2008, the station was housed in a geodesic dome whose crown is still visible above the snow.

The new base station resembles a small cruise ship more than a remote outpost and sleeps more than 150, all in private quarters. The new station rests on lifts that, as Remeron SolTab (Mirtazapine)- Multum accumulates, allow it to be jacked up two full stories. The telescope gathers data and sends it to the desktops of distant researchers. But when the telescope hits a glitch and an alarm on their laptops sounds, they have to figure out what the problem isfast.

Knowing what dark matter is would help scientists think about how new herbal medicine structure of the universe forms. Knowing what dark energy does would help scientists think about how that structure has evolved over timeand how it will continue to evolve.

Scientists have a couple of candidates for the composition of dark matterhypothetical particles called neutralinos and axions. One way to study it is to measure so-called baryon acoustic oscillations. When the universe was still in its infancy, a mere 379,000 years old, it cooled sufficiently for baryons (particles made from protons and neutrons) to separate from photons (packets of wundt wilhelm. This separation left behind an imprintcalled the cosmic microwave backgroundthat can still be detected today.

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