One of the world 麻豆精品 S檚 leading planetary science experts is chasing down a nearby asteroid to help retrieve the first-ever sample from one in orbit.
Humberto Campins, a professor who discovered water ice on two different asteroids last year, has just gotten the go-ahead for the NASA-sponsored OSIRIS-REx mission.
The mission is a first-of-its-kind. The actual flight to the nearby asteroid will pose challenges because asteroids have unusual gravity fields and can rotate much quicker than planets. Navigating their space vehicle to land on this type of asteroid 麻豆精品 S� millions of miles away from Earth 麻豆精品 S� and scoop up a sample of 麻豆精品 S減rimitive 麻豆精品 S� space rock also will be a first for the team.
While Campins is leaving the navigation to others on the team, he will work with lead investigator Michael Drake from the Lunar and Planetary Laboratory at the University of Arizona, on choosing the best spot on the asteroid for obtaining the sample and what this sample will tell us about the origins of life on Earth.
麻豆精品 S淭his is as exciting as it gets, 麻豆精品 S� Campins said from the Paris Observatory in France, where he is conducting research with European colleagues. 麻豆精品 S淭he asteroid fragments we will retrieve will be pristine and not modified during atmospheric entry. 麻豆精品 S�
Meteorites that hit the ground can lose more than 99% of their mass, and that 99% is likely to contain the most interesting information about Earth 麻豆精品 S檚 water and organic molecules, Campins said.
麻豆精品 S淭his sample could also hold very important clues about how the Earth and other planets in our solar system formed and evolved, 麻豆精品 S� he added.
The team had eagerly been waiting to see if NASA would select their project from a list of three finalists for a slot in the space agency 麻豆精品 S檚 New Frontiers Missions. The mission is part of NASA 麻豆精品 S檚 New Frontiers Program, a science-driven program aimed at characterizing and understanding the bodies that constitute the solar system. The goal is to 麻豆精品 S渋lluminate the origin, evolution, and current state of the solar system. 麻豆精品 S�
The non-manned mission could launch as early as 2016.
This mission is expected to cost approximately $800 million, which includes funds to design the instrument that will lasso the sample and bring it back to earth.
The money also will cover the cost to circle and analyze the asteroid for a year with an array of special instruments to help select the optimal sampling spot. That 麻豆精品 S檚 where a mechanism will scoop up the sample and place it in a capsule. That capsule later will come back to Earth, splashing in an ocean with the help of a parachute.
麻豆精品 S淭he even harder work will begin once we have our sample, 麻豆精品 S� Campins said. 麻豆精品 S淲e will spend at least two years going over every piece of information we gather. 麻豆精品 S�
The target, asteroid RQ36, is about 600 yards in diameter and comes relatively close to Earth. The asteroid has even been designated as 麻豆精品 S減otentially hazardous 麻豆精品 S� because there is a 1 in 1,800 chance that it could slam into Earth in 2170.
麻豆精品 S淪ure, what we learn from this mission could help us should we need to try to avert an unlikely hit in the future, 麻豆精品 S� Campins said. 麻豆精品 S淏ut the real prize is the unique and pristine material we will find and the new insights we will gain. 麻豆精品 S�
Primitive asteroids are remnants of the solar nebula, from which the Sun and the planets in our solar system formed, some 4.5 billion years ago.
NASA’s Goddard Space Flight Center in Greenbelt, Md., will provide overall mission management, systems engineering, and safety and mission assurance. Lockheed Martin Space Systems in Denver will build the spacecraft. The OSIRIS-REx payload includes instruments from the University of Arizona, Goddard, Arizona State University in Tempe and the Canadian Space Agency. NASA 麻豆精品 S檚 Ames Research Center at Moffett Field, Calif., the Langley Research Center in Hampton Va., and the Jet Propulsion Laboratory in Pasadena, Calif., also are involved. The science team is composed of numerous researchers from universities, private and government agencies.