The words of the stars.

Sentence-making: In the new photos released by the European Southern Observatory in La Cina, Chile, we can see that a giant ring made of hot gas dances like tentacles in space and rises from the nebula NGC3582.

Explanation: A celestial body that looks like a cloud in the sky. What is inside the Milky Way is called the Hanoi Nebula, and what is outside the Milky Way is called the Extragalactic Nebula or Extragalactic Galaxy.

2. Week

Sentence: After the task was completed, you stayed in Europe for another week. What did you do this week?

Explanation: (1) In the ancient calendar of China, twenty-eight lodges were arranged in the order of day, month, fire, water, wood, gold and earth once every seven days, which was called' seven lodges'. There is also a saying in the western calendar that' seven days is a week', which coincides with China's' Qixi'. Later, according to international practice, seven consecutive days arranged in this way are used as the calculation unit of work, study and other work and rest dates, called weeks. (2) Used with' Day, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday' to indicate a day of the week: ~ Day | ~ Wednesday | What day is it today? (3) abbreviation of Sunday: ~ rest.

3. Double stars

Sentence: This nebula is also home to most massive stars. At present, the only star who has been "weighed" is in this area. This huge star is part of a binary star system called A 1, and its mass is about 6 times that of the sun.

Explanation: (1) Two stars that are very close or have a gravitational relationship with each other are called binary stars. Those who can distinguish two stars with naked eyes or telescopes are called visual binaries; What can be distinguished by spectral methods is called spectral binary stars. One of the binary stars is called the main star, and the one that revolves around the main star is called the companion star. (2) refers to the cowherd and weaver girl.

4. Neutron stars

Sentence: In other words, I'm afraid the smallest black hole is really fleeting or does not exist at all. This creates a huge gap between the largest neutron star and the black hole produced by the smallest mass star.

Explanation: Neutron stars evolved from stars with considerable mass. Neutron stars rotate very fast and radiate periodic radio waves in the form of pulses.

5. Satellite images

Sentence-making: On most days, it can be seen from satellite cloud pictures that the Meiyu front is obliquely crossing the inland of China or the coastal areas, bringing intermittent rainy days to the areas under its influence.

Explanation: Cloud distribution map on the earth taken by meteorological satellite.

6. Xinghe

Sentence: With the opening of five new hotels in China and Ritz-Carlton Hotel in Shenzhen in recent two years, the extraordinary development of Ritz-Carlton in China is further proved.

Explanation: refers to the Milky Way.

7. Main star

In order to achieve this goal, scientists locked the telescope in 14 extrasolar planets, which are known exoplanets and can be seen directly in front of their main stars from the earth.

Explanation: The brighter of the binary stars around which the companion star revolves.