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updated 4/4/2013 9:49:10 AM ET 2013-04-04T13:49:10

WASHINGTON — Patience and meticulous science were cause for celebration when an international team of scientists announced new results pointing to the possible detection of dark matter Wednesday (April 3).

Although the James E. Webb Auditorium was nearly empty here at NASA Headquarters, it did not stop space agency officials and scientists from enthusiastically unveiling new findings in a news conference  Wednesday.

A somewhat anxious, yet excited tone took over the room as people trickled in right before the briefing began.

"Congratulations," one NASA colleague said to Michael Salamon, the U.S. Department of Energy Office of Science program manager for the Alpha Magnetic Spectrometer (AMS).

"There have been little glitches, but the end product is here for all of us to see and it's a happy day," Salamon said during the briefing. [ Dark Matter Across the Universe (Gallery) ]

NASA officials are excited because a team of scientists may have just found strong evidence supporting the existence of elusive dark matter thanks to a bus-size particle detector (the AMS) mounted on the outside of the International Space Station.

By sifting through a year-and-a-half of data, scientists have found about 400,000 positrons — the antimatter partner particles of electrons — that are at the right energy to suggest they were created when particles of dark matter collided and annihilated each other.

"Some days, my job is really great, and this is one of those days where my job is really great," William Gerstenmaier, the NASA associate administrator for Human Exploration and Operations, said.

Although the results might be exciting, the $2 billion detector that collected them almost never made it to space.

NASA canceled the AMS program due to concerns for astronaut safety in 2005, two years after the Columbia space shuttle accident. The cancellation caused backlash in the scientific community, leading Congress to approve funding for an extra shuttle mission to bring the instrument to the orbiting outpost.

"I guess it teaches us that patience is an important quality to have," Gerstenmaier said. "There were times where we were uncertain about exactly what the future was going to be, we knew the quality of science was pretty strong and was pretty important and the team hung in there … and kept kind of pursuing their passion, their dreams in pretty uncertain and turbulent circumstances, but they kept moving forward, all the teams and eventually things worked out."

The AMS was launched to the International Space Station in May 2011, and has been sending back data since its installation. The particle physics experiment is led by Nobel laureate Samuel Ting, a physics professor at MIT, with 200 scientists from 56 different institutions in 16 countries participating on the science team.

Wednesday's results represent the first chunk of data published by the international team of scientists working with the instrument. 

"I think it's just kind of the beginning of other great things that will come from this instrument on board space station," Gerstenmaier said.

Follow Miriam Kramer @mirikramer and Google+. Follow us @Spacedotcom, Facebook and Google+. Original article on  SPACE.com .

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