Michael a Hearn, the chief architect and director of a comet and spacecraft's intentional space collision, has pushed mankind's eternal exploration of the secrets of the solar system, died in May 29 at the home of University of Maryland Park. He was 76.
His wife, Maxine a' hearn, said the reason was pancreatic cancer.
An astronomy and honorary professor at the University of Maryland
A' hearn is the chief scientist of NASA's mission known as "Deep Impact," in which A crash spacecraft is fired directly into the path of A speeding comet.
Jim Green, NASA's director of planetary science, said in an interview: "never tried such a thing before . ".
Green says a' hearn is proposing to "make a hole" in the comet and see what's inside. At 1:52 a. m.
On July 4, 2005, a 23,000-mile-per-hour collision occurred 83 million miles from Earth.
It has become the headline news and news broadcast all over the world.
Achieve symbolic fourthof-
On July, the spacecraft was launched from Cape Canaveral, Florida, on January. 12, 2005.
The machine consists of two parts: one is a "flying over" process with precision recording equipment, the other is a removable "impactor" and the other is 820-
The size of the comet.
The comet, known as Tempel 1, is about nine miles long and three miles long.
7 miles wide, moving around the sun in the 1/2-year elliptical orbit between Jupiter and Mars.
When the comet and impactor spacecraft collided with what is said to be a force equivalent to 1/2 tons, there was a dazzling beam of light and a huge explosion of gas and cold debris.
Scientists have always believed that the comet contains substances left over from the formation of the solar system.
They want to look inside the Tempel 1 to see if the inside view will generate more information.
From the impact of the Tempel 1 and later overflight observations of other comets, the scientific community gained "a comprehensive rethink of our understanding of comet formation and how they work ", a' hearn said at 2013 when it announced the official end of the "Deep Impact" task.
"These tiny, icy remains formed in our solar system are much more diverse than we thought, whether from another part of a comet, or even from another part of a comet, he said.
Michael Francis a Hearn was born on November in Wilmington, Delaware.
1940. Grew up in Boston.
He graduated from Boston College and received a doctorate in astronomy from the University of Wisconsin in 1966.
That year, he joined the faculty at the University of Maryland.
He was appointed an outstanding university professor in 2000.
He won the honorary title in 2011, but has been doing research at the University.
The survivors included his wife, whom he married in 1963, Maxine Ramold A'Hearn, University Park;
Kevin P. From Oxford University, England.
A'Hearn and Patrick N from Vienna, Virginia.
A hotel in Seattle;
And five grandchildren.
Outside the lab and the classroom, a' hearn is an avid sailor.
He told his friends that he would most like to be a captain if he did not become a writer.
He used to combine his career with his hobbies by teaching a course on star navigation.
He likes casual wear, and sometimes it is said that formal wear means shorts and Hawaiian shirts.
In June 12, he will be awarded the outstanding public service medal of NASA.
After the collision with the Tempel 1, the "Deep Impact" flew over the spacecraft and continued to cross space.
In November 2010 and January 2012, it was close enough to other celestial bodies to record valuable scientific data.
Scientists at NASA and the University of Maryland keep in touch with the ship and track its movements.
But in August 2013 they lost contact and never resumed.
A month later, they officially finished the mission.
As for the comet Tempel 1, it continues to run on an elliptical orbit as if nothing has happened at all or very little.