Here’s the reality: humans will never live on an exoplanet (外星行星). That’s according to Michel Mayor, a physicist who was a winner of the Nobel Prize in physics this year.

“ 【小题1】 we are talking about exoplanets, things should be clear: We will not move there,” he told Agence France-Presse(AFP). He said he felt the need 【小题2】 (kill) all the statements that say, “OK, we will go to a livable planet if one day life is not possible on Earth.”

All of the   【小题3】 (know) exoplanets, or planets outside of our solar system,   【小题4】 (be) too far away to travel to, he said. “Even in the very optimistic case of a livable planet 【小题5】 is not too far, the time to go there is considerable,” he added.

Mayor shared half of the Nobel Prize this year along with Didier Quelos for   【小题6】 (discover) the first exoplanet in October 1995, over 4,000 other exoplanets   【小题7】 (find) in the Milky Way, but 【小题8】 (apparent), none of them can be reached.

Since the distance to the 【小题9】 (near) star outside of our solar system is about 70,000 times greater than the distance to Jupiter, all stars are effectively out of reach.

Mayor told the AEP: “We must take care of our planet; 【小题10】 is very beautiful and still absolutely livable.

Water on the Moon

NASA has confirmed the presence of water on the moon’s sunlit surface, a breakthrough 【小题1】 (suggest) the chemical compound that is vital to life on Earth could be distributed across more parts of the lunar surface than the ice that 【小题2】 (find) previously in dark and cold areas.

“We don’t know yet if we can use it as a resource,” NASA Administrator Jim Bridenstine said, but he added that learning more about the water is still crucial.

The discovery comes from the space agency’s Stratospheric Observatory for Infrared Astronomy, or SOFIA — a 【小题3】 (modify) Boeing 747 that 【小题4】 take telescope high into Earth’s atmosphere, 【小题5】 researchers may peer at objects in space with hardly any visual disturbance from water vapor. To detect the molecules, SOFIA also used a special camera to distinguish between water’s specific wavelength of 6.1 microns and that of its close chemical relative hydroxyl, or OH.

The data confirm 【小题6】 experts have suspected, that water might exist on the moon’s sunny surface, though the form of it shall be 【小题7】 (obvious) to detect. Experts will now try to figure out exactly how the water came to form and why it persists.

“Data from this location reveal water in concentration of 100 to 412 parts per million trapped 【小题8】 a cubic meter of soil.” NASA said in a release about the discovery.

“【小题9】 without a thick atmosphere, water on the sunlit lunar surface should just be lost to space,” said Casey Honniball, the lead author of a study about the discovery. “Somehow we’re actually seeing it.”

There are several possible explanations for the water’s presence, including an interesting yet reasonable【小题10】 claiming its origin to the stony micro objects from space. Small balls of glass from that process could trap water, according to the researchers’ paper.

No one knows exactly 【小题1】 the earth began, as it happened so long ago. However, according to a 【小题2】(wide) accepted theory, the universe began   【小题3】a “Big Bang” that threw matter in all directions.

What it was to become was 【小题4】 (certain) until between 4.5 and 3.8 billion years ago 【小题5】 the dust settled into a solid globe. The earth became so violent 【小题6】 it was not clear whether the shape would last or no.

People are 【小题7】(put) too much carbon dioxide into the atmosphere, which prevents heat from 【小题8】(escape) from the earth into space. As a result of this, many scientists believe the earth may become too hot to live on. So【小题9】life will continue on the earth for millions of years to come will depend on whether this problem can be【小题10】 (solve).