The US space agency NASA has revealed an astonishing picture revealing new secrets of the Earth’s home galaxy (星系), the Milky Way. The sun is just one of hundreds of billions of stars that form the huge shape of our galaxy. Our solar system sits in an outlying region but the new image focuses on the centre of the Milky Way, a “noisy” area because of all the crowded stars. Light from this region takes about 26,000 years to reach Earth. For comparison, light takes just eight minutes to reach us from the sun.

The researchers use the data collected by two telescopes that see the sky in ways that are very different from the visible light our eyes can see to form the new image. Most of the data comes from 370 different pictures taken over the past 20 years by NASA’s Chandra X Observatory. This satellite telescope detects X-rays out in space. X-rays are a from of radiation that is sent out when violent events heat matter to temperatures of millions of degrees. Other data comes from the MeerKAT telescope in South Africa, which can detect radio waves from space. These waves have much less energy than X-rays. They are usually produced by cooler material, such as huge clouds of gas between the stars.

The brightest sources include neutron stars which are the cores of huge stars that ran out of fuel and collapsed to city-sized balls of super hot matter. Many neutron stars and black holes jet out gases that appear in the picture as purple streaks (斑纹). Powerful magnetic fields in the area cause the jets to bend as they get further from their source. Astronomer Dr Daniel Wang, who has worked on the image over the past year, said the new picture described “a violent or energetic ecosystem”.

Kiribati is a South Pacific nation of 33 islands along the equator(赤道). It gained its independence from the UK on July 12, 1979. The International Date Line runs through this country. People here are always the first to see a new day. However, this Pacific Island nation may be the first country to disappear under the rising sea levels of climate change.

As our boat nears the shore, the dark shadows beneath the sea sharpen into focus. Coral stones, organized neatly into rows, glisten from the reef of this shallow bay. We are drifting over the foundations of the neighborhoods of Tebunginako. The village was once home to more than 200 households, but today, it lies beneath several meters of water.

“We used to swim out there to see the ships when we were boys. They’d tie them up to the coconut trees just over here,” explains the Mayor, pointing enthusiastically as we coast over the remains of his town. Locals say Tebunginako was once the island’s main harbor—before the rising sea swallowed its coast.

Many of Kiribati’s citizens have escaped to the capital island, South Tarawa, due to climate related disasters. Objectively, developed countries should be responsible for global warming. Like any other developing island state, the fresh water supply here is being strained. The Mayor adds.“ “Climate change and the rising sea worsen a problem we already have concerning our water resources.” A teacher approaches and complains. “We are very simple people with very simple needs, but we do not want to be faced with something that is not entirely of our own doing.”

As the sun sets in Tebunginako, the Mayor guides us to the shore of the town’s two remaining structures, a Church and a traditional community center. The Mayor states, “These places are important to our people because of their religion and because it was the last place they were all together.”

Scientists have designed a new machine - a robot which looks exactly like the famous scientist Albert Einstein.It can recognize and respond to human emotions(情感).The robot is made of special material that allows it to change facial expressions.The material that makes up the robot's face is so detailed that it looks like real human skin.

The robot's designers chose Einstein, the Nobel Prize winner, because he was one of the greatest scientists of all time.They also chose Einstein because his face is very well known and he appear 'loveable'.

Dr.Hanson,who designed the robot, explained that it was important to develop machines that know what human beings are feeling.

The robot uses computer software that helps it to understand hundreds of human expressions such as sadness, anger, fear and happiness.It can also recognize a person's age, and whether they are male or female.Mr.Movellan, who designed the software, said that in the future the robot could be in museums to help people from different cultures to understand one another.