1. The average diameter of the moon is 3475 km. She takes fifth place in the list of the largest satellites of the solar system - only Ganymede, Titan, Callisto and Io are larger than her.
2. The mass of the moon is 81 times less than the mass of the Earth, the volume is almost 50 times.
Rising of the Earth over the Moon. One of the most famous photographs in history, taken by the Apollo 8 crew in 1968. Source: NASA / Bill Anders
3. The surface area of the moon is 58 million square kilometers. This is more than the area of Africa, but less than the area of Asia.
4. Thanks to the libration effect from the Earth, 59% of the lunar surface can be seen.
5. According to the radioisotope analysis of lunar samples, Tycho Crater with its famous ray system formed 108 million years ago, when dinosaurs still reigned on Earth.

Crater Quiet. Source: NASA / GSFC / Arizona State University

The central peak of the Tycho Crater. Source: NASA / GSFC / Arizona State University

The central peak of the Tycho Crater. Source: NASA / GSFC / Arizona State University
6. The moon seems to us a very bright body. But in fact, the reflectivity (albedo) of its surface is only 13%, which is almost three times less than the albedo of the Earth. Therefore, in their joint photographs, the brightness of the moon is often specifically increased.
7. Over 40% of the visible side of the moon is occupied by the seas - dark lowlands covered with frozen lava deposits.
8. The reverse side of the moon is markedly different from the visible. On average, it is higher, most of the largest lunar craters are located on it, but at the same time there are only two seas.
The far side of the moon (snapshot Apollo 16). Source: NASA
Earth and the moon through the eyes of the Chang'e-5T1 station. Source: CNSA
9. Now the moon has no magnetic field. However, analysis of lunar soil samples showed that in the distant past it had its own magnetic field, which even exceeded the earth's strength.
10. The first living creatures flying around the moon were the Central Asian steppe turtles aboard the Soviet probe Zond-5 launched on September 15, 1968. They included Drosophila flies, Khrushchuk beetles, various plants, seeds and microorganisms. The lander of the ship successfully splashed in the Indian Ocean on September 21.(не обращай внемания на ссылки:)
общие
1. Is your answer expected today?
2. Will our work be finished tomorrow?
3. Was his report discussed at the University?
4. Is this picture much spoken about?
5. Were they shown the house yesterday?
6. Was the letter sent by fax?
альтернативные
1. Is your answer expected today or tomorrow?
2. Will our work be finished tomorrow or next week?
3. Was his report discussed at the University or at college?
4. Is this picture much or little spoken about?
5. Were they shown the house yesterday or last week?
6. Was the letter sent by fax or by e-mail?
специальные
1. When is your answer expected?
2. When will our work be finished?
3. Where was his report discussed?
4. What picture is much spoken about?
5. When were they shown the house?
6. How was the letter sent?