（带文稿）0914：NASA“毅力号”成功采集第一块火星岩石样本【文末小测】

This Sept. 1, 2021 image provided by NASA shows the hole drilled by the Perseverance rover during its second sample-collection attempt in Mars' Jezero Crater. (NASA/JPL-Caltech via AP)

Transcript

The American space agency NASA says its Mars explorer, or rover, has successfully collected its first Martian rock sample.

The rover, called Perseverance, used a drill attached to its robotic arm to remove a small, circular sample -- also called a core -- from a larger rock on the surface of Mars.

NASA confirmed the successful collection in a statement on Monday. The agency also released pictures of the sample, which it said appears to be about as thick as a writing instrument.

After the drilling was completed, Perseverance took additional pictures of the sample as well as the tube it was kept in. The images are useful to scientists back on Earth who study the sample.

This Wednesday, Sept. 1, 2021 photo made available by NASA shows the first rock sample for return to Earth, obtained by the Mars Perseverance rover. (NASA/JPL-Caltech/ASU via AP)

In the final step, Perseverance moved the tube to a storage area inside the rover and hermetically sealed the container. Hermetic sealing is a process that completely closes off the container so that no air can flow in or out.

The Perseverance team shared the news on Twitter. “It’s official: I’ve now captured, sealed, and stored the first core sample ever drilled on another planet, in a quest to return samples to Earth.” The tweet added that the sample was “the first in a one-of-a-kind Martian rock collection.”

It was the second collection attempt for Perseverance. The first one happened about a month ago. In that try, NASA confirmed that the rover had successfully drilled into another rock at a different site on the Mars surface.

But during the collection attempt, images showed that the sample tube was empty. NASA engineers later reported that the rock the rover drilled into must not have been strong enough to produce a core sample. So, the drilling operation only produced dust that could not be collected.

The latest core sample -- and all others collected from now on – will be stored on Mars until they can be picked up during future missions to the Red Planet and brought to Earth. NASA says its Mars Sample Return mission -- to be carried out jointly with the European Space Agency -- could have the rock samples back to Earth sometime in the 2030s.

NASA science officer Thomas Zurbuchen called the successful collection a “truly historic moment.” The agency’s leader, Bill Nelson, also praised the effort and said, “I can’t wait to see the incredible discoveries produced by Perseverance and our team.”

Perseverance landed in February at Jezero Crater, an area scientists believe to be the remains of an ancient river system. The high-tech rover is on a mission to search for signs of ancient microbial life on Mars.

Perseverance has been assisted in some efforts by a small experimental helicopter called Ingenuity. The helicopter made history in April by becoming the first aircraft to perform a powered, controlled flight on another planet. So far, Ingenuity has performed above expectations, completing 11 flight tests and helping to identify areas for Perseverance to explore.

Ken Farley is a project scientist on the Perseverance team. He said the latest collection effort marks the beginning of many more to come for the rover, which has 43 sample tubes to fill.

“There is a lot of Jezero Crater left to explore, and we will continue our journey in the months and years ahead,” Farley said in a statement. “When we get these samples back to Earth, they are going to tell us a great deal about some of the earliest chapters in the evolution of Mars,” he added.

I’m Bryan Lynn.

What happened in Perseverance’s first attempt to collect a rock sample?

A. It collected a much smaller, thinner rock sample.

B. It produced several, small samples from one rock.

C. It produced only dust that could not be collected.

D. It collected a frozen sample that could not be stored.

What will happen to the rock samples collected by Perseverance?

A. Perseverance will further examine the rock samples on Mars.

B. The best samples will be kept and the others destroyed on Mars.

C. The rover will transport the samples to Earth when its mission ends.

D. They will be stored on Mars until a future mission picks them up.

How has Ingenuity been assisting Perseverance in its operations on Mars?

A. By transporting rock samples to the sealed container

B. By collecting dust samples to be returned to Earth

C. By helping to identify areas for the rover to explore

D. All of the above

What did Ken Farley say can be learned by studying the rock samples on Earth?

A. They can help design new rovers to be sent to other planets.

B. They can give a better understanding of the evolution of Mars.

C. They can lead to new information about similar rocks on Earth.

D. They can help identify dangerous materials in Mars’ atmosphere.

Words in This Story

sample – n. a small amount of something that gives you information about the thing it was taken from

drill – n. a tool or machine used for making holes in a hard substance

quest – n. an attempt to get something of do something difficult

mission – n. an important project or trip, especially involving space travel

incredible – adj. unbelievable, exciting or large

journey – n. the act of traveling from one place to another

chapter – n. a period of time when something happens

evolution – n. the way in which things gradually develop and change over millions of years