Fortune Telling Collection - Zodiac Analysis - Search for previous astronomical problems in Ossetia

Search for previous astronomical problems in Ossetia

Examination questions of the eighth astronomical Olympic competition

Domestic preliminaries of the 8th International Astronomical Olympiad.

Reference data: Geographical latitude of Beijing: 40 degrees north latitude. Azimuth is calculated from the south point.

1, the distance between two celestial bodies on the celestial sphere is measured by ().

(a) light years (b) parsec (c) astronomical units (d) angular units.

2. Which of the following celestial bodies can't be seen on the celestial equator? ()

(a) Sirius (b) Mercury (c) Moon (d) Sun

The Spring Festival in 2003 is in February 1. So on March 3, 2003, the transit time on the moon was ()

(a) Midnight (b) Sunrise (c) Noon (d) Sunset.

4, annular eclipse must occur in the Gregorian calendar () month.

(A) 1 day (b)1day (c) may be any day (d). It is impossible to have an annular eclipse.

5, a year can be observed at 20 degrees north latitude celestial declination range is ()

(a)+20 to +90 (b)-20 to +90 (c)-70 to +90 (d) are all wrong.

6. If a total lunar eclipse occurs during the summer solstice, the declination of the moon is roughly ().

(A) 0 degree (b)-23 degree (c)+23 degree (d) is possible.

7. The horizon height of the sun seen by Beijing at noon 12 in the middle and late March every year is roughly () degrees.

23 (B) 40 (C) 50 (D) 75

8. If the eclipse occurs at 6 o'clock in the morning, then the azimuth of the moon is roughly () degrees.

(A) 0 (B) 90 (C) 180 (D) 270

9.3.21day, local sidereal time is 6 o'clock, and 90 east longitude is roughly () hours.

0 (B) 6 (C) 12 (D) 18

10, the equivalent aperture of LAMOST telescope being built in China is about () meters.

(a) 0.6m (b) 4m (c)10m (d)100m or more.

1 1, the following celestial bodies are arranged in the correct order from near to far from the sun ().

(1) Earth, Mars and Beijing Normal University (2) Moon, Earth and Jupiter.

12, it is impossible to observe () on the earth.

(a) partial solar eclipse (b) annular solar eclipse (c) partial lunar eclipse (d) annular solar eclipse

13, the astronomical unit is defined as ().

(a) The distance from a celestial body at an angle of one second to the sun; (b) The distance traveled by light in one year; (c) The average distance from the earth to the sun; (d) The time it takes for light to travel from the sun to the earth.

14, the relationship between the angular distance of the stars projected on the celestial sphere and the actual distance between them is ().

(1) It doesn't matter. (b) approximately inversely proportional. (c) approximately proportional. (d) It can be deduced from the formula of spherical triangle.

15, the time when the moon rises in the Mid-Autumn Festival is ().

(a) Midnight (b) Sunrise (c) Noon (d) Sunset.

16, most of the optical telescopes of the National Astronomical Observatory belong to ().

(a) Refractive telescope (b) reflecting telescope (c) Refractive telescope (d) Flat telescope.

17, the celestial declination range that can be observed in the Arctic within one year is ().

(a) 0 to +90 (b)-50 to +50 (c)-50 to +90 (d)-90 to +90.

18, during the total eclipse, the moon covered the stars, so the eclipse began at the moon's ().

(a) East (b) West (c) Sometimes in the east, sometimes in the west (d), it is impossible to have an eclipse.

19, from the late period of total lunar eclipse to the last contact stage, if the azimuth of the moon is 90, it looks like (). (a) The top of the moon is bright; (b) The bottom of the moon is bright.

20. Which of the following celestial bodies can we always see on the ecliptic? ()

(a) Polaris (b) Sun (c) Moon (d) Asteroids

2 1. Which of the following constellations can you see on an autumn night in Beijing? ()

(a) Cassiopeia, Perseus and Pegasus (b) Orion, Leo and Sagittarius.

22. If there is an asteroid in the earth's orbit that does not rotate, according to the earth's time unit, the period of day and night alternation somewhere above it is ().

(a) There is no alternation of day and night (b) One day (c) One month (d) One year.

23, a star, a month ago night 10, asked the star about tonight ().

(1) Don't get up at 8: 00 (2) 10 (3) 12 (4) at night.

24, geographical latitude 42 north latitude, zenith declination is equal to ().

42 (B) 48 (C) 67 .5 (D) 90

25. Around BC 1 100, astronomers in China found that the horizon of the sun is equal to 79 07' at noon from summer solstice and 31kloc-0/9' at winter solstice (south of zenith). The latitude of the observation point is ().

(A)34 47′(B)47 48′(C)55 13′(D)79 07′

26, 13000 years later, the vernal equinox will be located in the constellation ().

(a) Maid (b) Lion (c) Aries (d) Bear

27. If the visual magnitudes of the two sub-stars of Andromeda γ star are equal to 2.28 and 5.08 respectively, the total apparent magnitude of the binary star is ().

1.57 (B) 2.2 (C) 2.8 (D)7.36

28. When Mars is closest to the Earth, its angular diameter is 24 ",and the diameter of the image of Mars taken with a refraction telescope of f = 19.5m is () mm. ..

(A)0.24(B)2.27(C)8.68(D) 13.6 1

29. If the distance of a 4-magnitude star is reduced by half, its apparent magnitude becomes () and so on.

1.5 (B) 2.0 (C)2.5 (D) 8.0

30. Assume that the actual temperature of a star is constant (that is, the brightness per unit area of the star is constant and the surface fluctuates periodically). When pulsating, the ratio of the maximum radius to the minimum radius of a star is 2: L, and the total brightness of this star changes by () order of magnitude.

1.5 (B)2 (C) 4 (D) 6

3 1, let the number of stars in the range from 10 to 1 1 be 546000, which is about the same magnitude as ().

Replace the brightness of all stars from 10 with 1 1.

(a) less than 4 (B) 34 (C)350 (D) more than 1000.

32. In the star spectrum, the calcium line with the wavelength of 422.7nm moves to the purple end of the spectrum by 0.07nm, and the speed of this star along the line of sight is () km/s..

25 (B)50 (C) 70 (D) 600

33. The famous Keck telescope is located on Mount Yashan in Monaque. Its aperture is 10 meter, so the limit magnitude it can see is (). Let the limit magnitude visible to the naked eye be 6 and the pupil diameter be 6 mm

(1) About 15, etc. (b) About 18, etc. (c) About 22, etc. (d) About 28, etc.

34. The apparent velocity of Weaver Girl 1 is equal to-14km/s, and the parallax is 0″. 348+024 years. Weaver Girl 1 The total space speed relative to the sun is () km/s.

(A) 14 (B) 19 (C) 37 (D) is greater than 50.

35. It is known that the temperature of a star is T=3 100K, while the absolute magnitude m =-4.0, and its radius is about () times that of the sun. (hint: the temperature of the sun T=5700K)

(A) 197 (B) 350 (C) 480 (D) is greater than 1000.

36. In the 1 1 century, Persia experimented with a calendar of 33 years. In this cycle, there are 25 normal years and 8 leap years. Try to determine the length of Persian calendar year as () days. 365.2422(B)365.2424(C)365.2425(D)365.2428

37, 193 1 year, KarlJansky used his radio telescope to detect a radio signal from outside the earth, which arrived at () 4 minutes every day, indicating that it was not from the sun, but from an extraterrestrial body.

(a) advance (b) postpone (c) neither advance nor postpone.

38. Imaginary residents on the moon see the earth at the full moon ().

(1) New Moon (2) Winding (3) Overlooking (4) Winding.

According to Newton's law of universal gravitation, the gravitation between two objects is inversely proportional to the square of their distance. So, for example, when you are far away from the earth, the gravity of the earth will gradually weaken. Now let's assume the opposite situation, that is, the gravity between two objects is proportional to the square of their distance, then the moon will go around the earth ().

This is possible and in line with the current situation.

(b) It may happen, but it is different from the present situation.

Impossible, the moon will no longer orbit the earth.

(d) Impossible, the moon will eventually collide with the earth.

40, in order to understand the extraterrestrial civilization, scientists plan to launch an unmanned spacecraft to alpha Centauri, then the minimum speed required to detect the spacecraft is () km/s. ..

7.9(B) 1 1.2(C) 16.9(D) 18.4

4 1, about the mass of a black hole, the following statement is correct ().

(a) It must be infinite; (b) It is not necessarily infinite, but at least it should be close to infinity.

42. Let's assume that a spaceship flies to a planet at a speed of 0.5c(c is the speed of light), and at the same time, the spaceship emits a fixed optical signal to the planet at a frequency of every 2 minutes during the flight. Then, for the observer on the planet, the frequency of the optical signal will be (C).

(a) 2 minutes; (b) more than 2 minutes; (c) less than 2 minutes; (d) depending on the frequency of the optical signal.

43, 1675, Danish astronomer Romer observed the solar eclipse of Jupiter's larger moon Europa 1, and found that the solar eclipse time observed when the earth was far away from Jupiter was about 1000 seconds later than that observed when the earth was close to Jupiter. Using this observation, we can calculate ().

(a) the speed of the earth's orbital motion around the sun

(b) Jupiter's orbital velocity around the earth

(4) the speed of light

44, in the earth's circular motion around the sun, assuming that at a certain moment, the gravity between the sun and the earth suddenly disappeared for some reason, then about the earth's motion, the following statement is correct (). (Note: Kepler's second law: the radial direction of a planet (the line connecting the center of the sun to the center of the planet) sweeps the same area at the same time. )

(a) The earth will no longer run in an elliptical orbit, and Kepler's second law will no longer hold.

(b) The earth will no longer run in an elliptical orbit, but Kepler's second law still holds.

(d) The Earth will continue to move in an elliptical orbit, but Kepler's second law still holds.

45, assuming that after landing on Mars, we launch a spacecraft on Mars to return to Earth, then the speed of the spacecraft should be at least () km/s. ..

(A)3.5(B)5.0(C)7.9(D) 1 1.3

46. If a spaceship is launched from the earth, which of the following places consumes the least energy when human factors are consistent? ()

(a) Hainan Island (b) Shanghai (c) Beijing (d) Xichang.

47. In the zodiac, the sun stays in () for the shortest time?

(a) Sagittarius (b) Gemini (c) Aries (d) Virgo

48, assuming that in the near future, low orbit intercontinental rocket will be able to put into passenger travel, then the travel time from Beijing to new york will probably be shortened to ().

(a) within1minute (b) 1 hour (CD) within 24 to 5 hours (d) over 24 hours.

49, assuming that the absolute magnitude of the two stars is the same, if the distance between the two stars and the earth is 100 times, then the visual magnitude of the two stars is different (), and so on.

5(B) 10(C) 15(D) 100

50. We can't see the back of the moon on the earth, because ().

(a) The moon does not rotate; (2) The rotation period of the moon is the same as that of the earth.

(c) The moon's rotation period is the same as its period of revolution around the Earth. (d) Any of the above points is wrong.

The 8th International Astronomical Olympiad Domestic Final

Lower grade group

10 for each question. Please answer the questions with the given answer sheet, number your own pages and indicate the candidates' names on each page. Please refer to the notes on the other page. Possible constants or values: the speed of light C = 3× 108m/s, the gravitational constant g = 6.67×10-1m3/kg/S2, and radius of the earth 6400km.

The radius of the sun is 7× 105km, sin23.5 =0.399, cos23.5 =0.9 17+07.

arcsin0.387=22.8，arccos0.387=67.2，arctg0.387=2 1. 1

When | x |

(1+x) α = 1+α× x (α is any real number) ex =1+xln (1+x) = X.

lg( 1+x)=0.4343×x

Sinx=x(x (x in radians) tgx=x(x (x in radians)

Cosx = 1-x2/2 (x is in radians)

1. The distance between Mercury and the sun is 0.387 astronomical unit. On May 7, 2003, there was a transit of Mercury. How many days after that, mercury first reached the east distance and the west distance?

2. The orbit plane of the moon around the earth has only a small angle with the ecliptic. When does the first quarter moon appear in a year (for example, a few months or so), and when it is in the sky, can it have the maximum horizon height? Suppose you observe in Beijing.

3. If, for some reason, the Huang Chi Angle becomes 60 degrees, what range of people on the earth may experience extreme sunlight?

4. Mercury's rotation axis is perpendicular to the orbital plane, and its rotation period is two-thirds that of period of revolution. So how long will it take to observe from sunrise to sunset on Mercury? (Please take period of revolution as the unit, that is, the year of Mercury).

5. A civilization similar to ours has appeared on the planet of a star which is 0/0 light years away from the Earth. They have the same magnitude system as us. They are curious to find planetary systems beyond them. Coincidentally, our sun is a long-term monitoring target. They tried to detect possible planets by the magnitude change of stars caused by the Ling Xing of the planet. If they can detect the light variation in the order of 0.00 1, is it possible for them to find the earth in this way? Why?

6. There is a story of "Kuafu chasing the sun" in ancient China mythology. If Kuafu lived near 30 degrees north latitude, when he saw that the sun was about to set, he would start running hard to the west. In order to keep the sun from setting, how many kilometers per hour must Kuafu reach? How does this speed compare with the speed of sound (340m/s) at normal temperature and pressure?

7. There is an asteroid with a perihelion of 2 astronomical units and an apohelion of 5 astronomical units. The telescope on the ground observed it twice, both at the time of impact, once at perihelion and once at apohelion. What is the magnitude difference of this asteroid observed these two times?

8. The absolute magnitude of all type Ia supernovae is about-19.5, etc. At present, a type Ia supernova explosion event in a spiral galaxy has been observed, and the apparent magnitude of this supernova is 15.5 when it is extremely bright. Through the spectral observation of this galaxy, it is known that the red shift of this galaxy is 0.023. Please estimate the Hubble constant (in km/s/s) according to the above data.

9. The sundial is a tool to time by using the position of the sun in ancient times. When the sun reaches the zenith, the time indicated by the sundial is 12 o'clock, but in fact, you will find that the local time is generally not 12 o'clock, and the difference between them changes with the seasons.

(1) What are the possible reasons for the difference?

(2) If the earth's orbit is round, you set your watch to 12 when the sun reaches the zenith in vernal equinox. What time does your watch show that the sun will reach the zenith again the next day?

10. Give the names of the main constellations in the map 1, and draw the positions of the following celestial bodies on the map: M 13, north celestial pole, north yellow pole. Give the name of JBO meteor shower and draw the position of radiation point when JBO is maximum. Figure 1:

1 1. Point out the names of the three constellations in Figure 2. Mark the positions of the ecliptic and the celestial equator on the map. According to the western customs (such as Lyra α) and the traditional customs in China (such as Weaver Girl), the magnitude of the four brightest stars on the map and their Chinese names are given respectively. Figure 2:

Watch Mars tonight 12 in Beijing 12. What is its horizon height, azimuth (from the south point), right ascension, declination, brightness and constellation? When is the next Mars Rush? What constellation was Mars in at that time? What are the horizontal coordinates, equatorial coordinates and ecliptic coordinates observed in Beijing on 12 that night?

Advanced group

The speed of light c = 3×108m/s; Gravitational constant g = 6.67×10-11m3/kg/S2; Radius of the earth is 6400 kilometers.

The radius of the sun is 7×105 km; ; The mass of the sun is 2×1030 kg; The mass of the earth is 6× 1024kg.

sin23.5 =0.399，cos 23.5 = 0.9 17； arcsin0.387=22.8，arccos0.387=67.2，arctg0.387=2 1. 1

When | x |

(1+x) α = 1+α× x (α is an arbitrary real number) ex =1+x.

ln( 1+x)= x LG( 1+x)= 0.4343×x

Sinx=x(x (x in radians) tgx=x(x (x in radians)

Cosx = 1-x2/2 (x is in radians)

Around the vernal equinox, you go to a seaside city near the equator for a holiday. You got up early and stood on the beach watching the sunrise at sea with great interest. When you see the upper edge of the sun jump out of the sea, you start timing and quickly land on the beach. When you see the upper edge of the sun jump out of the sea again, stop timing. How long is the interval between these records? Suppose the height difference between your eyes when you are standing and lying is 1.60 meters.

4. A civilization similar to ours has appeared on the planet of a star which is 0/0 light years away from the Earth. They have the same magnitude system as us. They are curious to find planetary systems beyond them. Coincidentally, our sun is a long-term monitoring target. They tried to detect possible planets by the magnitude change of stars caused by the Ling Xing of the planet. If they can detect the light variation in the order of 0.00 1, is it possible for them to find the earth in this way? Why?

5. One asteroid has a perihelion of 2AU and an apohelion of 5AU. The telescope on the ground observed it twice, both at the time of impact, once at perihelion and once at apohelion. What is the magnitude difference of this asteroid observed these two times?

6. The absolute magnitude of all type Ia supernovae under extreme brightness is about-19.5, etc. At present, a type Ia supernova explosion event in a spiral galaxy has been observed, and the apparent magnitude of this supernova is 15.5 when it is extremely bright. Through the spectral observation of this galaxy, it is known that the red shift of this galaxy is 0.023. Please estimate the Hubble constant (in km/s/s) according to the above data.

7. The sundial is a tool to time by using the position of the sun in ancient times. When the sun reaches the zenith, the time indicated by the sundial is 12 o'clock, but in fact, you will find that the local time is generally not 12 o'clock, and the difference between them changes with the seasons.

(1) What are the possible reasons for the difference?

(2) If the earth's orbit is round, you set your watch to 12 when the sun reaches the zenith in vernal equinox. What time does your watch show that the sun will reach the zenith again the next day?

8. A globular cluster, right ascension α, declination δ, observes the apparent velocity of its member stars and observes it by itself. The average apparent velocity of these member stars is km/s, and the average square of apparent velocity is (km/s) 2. Their average right ascension variation is angular seconds per year, and the average square of right ascension variation is (angular seconds per year) 2. Find the distance from this globular cluster to us (parsec).

9. In astronomy, the magnitude of area is often used to represent the brightness of non-point source. If we observe that the flux per square angular second of an area on a non-point source (such as a galaxy) is the same as that of a star with an apparent magnitude of m in this band, we say that the surface magnitude of this area of the non-point source is m or m/ square angular second. Andromeda galaxy is about 750 kilometers away from us. Now it is observed that one of its clusters is in the same line of sight with a certain area on its core ball, and the surface brightness of their superposition is 19 equi/sq. The second analysis shows that this cluster is similar to a cluster in the Milky Way with a brightness of 20 equi/sq. Sec at a distance of 7.5kpc, what is the surface brightness of the area of the Andromeda galaxy's nuclear sphere itself (just list the formula and don't calculate the final result)?

10, the life of the sun is about 10 billion years, which is mainly spent in the main sequence star stage, and other stages (such as the red giant stage) are relatively short. The luminosity L of the star in the main sequence stage has a good relationship with the mass M of the star, which is roughly proportional to M3.5 Please estimate that the life of a star is twice the mass of the sun.

1 1. One way to detect extrasolar planetary systems is the apparent velocity method. Because the star and its planets rotate periodically around its center of mass, the apparent velocity of the star will change periodically, and the Doppler effect caused by it can be detected by spectral observation of the star. If a star has the same mass as the sun, and it has a planet 5AU away from it, its mass is about one thousandth of that of this star (similar to the Sun-Jupiter system), what is the maximum change of the apparent velocity of this star? (Assuming a circular orbit). What about the sun-earth system?

12. Give the name of the constellation in the diagram 1 and draw the positions of the following celestial bodies on the diagram: M 13, M5 1, M8 1, m101; North celestial pole, north yellow pole, north silver pole. Give the name of JBO meteor shower and draw the position of radiation point when JBO is maximum.

13. Point out the names of the three constellations in Figure 2. Mark the positions of the ecliptic and the celestial equator on the map. According to the western customs (such as Lyra α) and the traditional customs in China (such as Weaver Girl), the magnitude of the four brightest stars on the map and their Chinese names are given respectively.

14. Calculate the local sidereal time tonight 12. If optical observation is carried out in the suburbs of Beijing tonight, the approximate coordinate range of the selected observation objects is given.

Observe Mars in Beijing tonight 15 and 12. What is its horizon height, azimuth (from the south point), right ascension, declination, brightness and constellation? When is the next Mars Rush? What constellation was Mars in at that time? What are the horizontal coordinates, equatorial coordinates and ecliptic coordinates observed in Beijing on 12 that night?

The 8th International Astronomical Olympiad

Lower grade group

1. Today is the day when the world's first Soviet artificial satellite "Putnik I" was successfully launched, marking the 46th anniversary of the beginning of the "space age". This satellite is as big as a basketball, with a diameter of 580mm and a mass of 83.6kg. The surface of the satellite has a fine aluminum alloy plate with a thickness of 2 mm Sputnik means "companion" in Russian (that is, "satellite" in astronomical sense). The orbit of this satellite is elliptical. After the launch, the perigee is 227 kilometers from the earth's surface and the apogee is 945 kilometers. It flew in orbit until1958 65438+1October 4th. Use necessary maps and calculations to estimate whether satellites can be observed with naked eyes at that time?

In order to obtain information about the structure of the universe, stellar astronomers use optical telescopes to observe at night. If it is possible to raise the water temperature of an ordinary swimming pool (50×20×2m3) with all the energy they have collected so far, how many degrees can the water temperature rise with order of magnitude accuracy? The heat capacity of water is 4200J/(kg k). The radiation constant of the sun is equal to 1.37kw/m2. The parameters listed in the table can be used according to the calculation needs.

The polar bear was mentioned in the last Astronomical Olympic Games. The polar bear still sits in the North Pole, but this year a new penguin sits in the South Pole. Recently, penguins observed the sunrise after the midnight. What did the polar bear see at this moment? When penguins only see half the sun on the horizon, draw what polar bears see. Suppose the earth is a sphere, the answer should be to draw a polar bear in the North Pole to illustrate. There should be necessary dimensions or angles in the drawing. Recall the necessary information of these two animals by yourself.

On August 28th, 2003, a Mars collision occurred at 17h56mUT, and the next Mars collision occurred at 20 18. In order to calculate the specific time of the collision, only the data in the provided "Planetary Data Sheet" can be used to solve the problem.

Recently, due to the lack of sensational news, some reporters in popular newspapers spread rumors that Americans did not land on the moon, and the Apollo program was the biggest mystery of the 20th century. They gave some examples. For example, in order to create a feeling of weak gravity, you can use Hollywood films with different film speeds to film a person's movements and jumps.

Please calculate the film shooting speed (how many frames per second) of the Earth Studio to give people the impression that the event happened on the moon and was shown at the standard speed (25 frames per second on TV).

6. In a fairy tale of northern countries, people asked the deer god to tell them how many stars were in the sky. The deer god spent several weeks counting the stars and found that there were 252,707 stars in the sky. As we all know, people can directly see 6000 stars in the night sky with the naked eye. It can be concluded that the eyes of the deer god are larger than the pupils of human eyes. What is the pupil diameter of the eye of the deer god? (Assume that the stars are evenly distributed in the sky; Deer gods and human eyes have the same sensitivity to retina. )

Advanced group

4. The big impact of Mars occurred on August 28th, 2003 17h56mUT UTC, and the next big impact of Mars occurred in the summer of 20 18. Some people don't understand this matter, and regard 20 18 as not a big rush, but an ordinary one. Suppose this planet is called "Mars 2", calculate its orbital parameters and estimate the apparent magnitude observed when it is in the average eclipse position on the earth. Suppose that the orbit of "Mars II" is circular, and its physical characteristics are the same as those of Mars.

An astronomer always notices that the sun is just on the mathematical horizon when observing the stars in the same place every day. When and where did the observation take place? The answer must include explanations and detailed drawings and possible coordinates.

The ancient Greeks knew for a long time that the size of the earth was much smaller than the distance between the stars. For example, there is a myth that hephaestus, the god of fire and forging, once accidentally dropped the anvil, and it took him nine days to hit the ground. Please estimate the "height of the sky" described by the ancient Greeks and compare it with the distance of celestial bodies you know. (You can use the data in the planetary data table for any topic. )

Domestic preliminaries of the 9th International Astronomical Olympiad.

Lower grade group

1, Altair is located in ().

(a) Taurus (b) Eagle (c) Pegasus (d) Cygnus (e) I don't know.

2, Sirius is located in ().

(a) Ursa major (b) Ursa minor (c) Ursa major (d) Ursa minor (e) I don't know.

3, the Pleiades cluster is located in ().

(a) Perseus (b) Andromeda (c) Gemini (d) Taurus (e) I don't know.

4.M42 is located in ().

(a) Taurus (b) Scorpio (c) Ursa major (d) Orion (e) I don't know.

5. The following constellation farthest from the direction of the Milky Way is ().

(a) Cygnus (b) Capricorn (c) Cassiopeia (d) Perseus (e) I don't know.

6. At present, the astronomical popular science publication officially issued in China is ().

(a) sky and telescope (b) starlight news (c) astronomy enthusiasts (d) planetarium research (e) I don't know.

7. In the 2003 International Astronomical Olympiad, China won () medals.

I don't know

8. In recent years, the player of China team who won the astronomy prize of Intel International Science and Engineering Grand Prix is ().

(a) Ceng Li (b) Meng Huan (c) Liang Yue (d) Zhao Weihong (e) I don't know.

9, so far in China found the most SOHO comet is ().

(1) Ge He (2) Zhang Daqing and Meng Huan (3) He.

Li Weidong and Zhu Jin don't know.

10, the name that has been named as an asteroid in the following names is ().

(a) Zhu Jin (b) Meng Huan (c) Zhang Daqing (d) Ricky (e) I don't know.

1 1, a light year is about () astronomical unit.

(a) 3.3 (b) 38 (c) 63,000 (d) 65,438+500 million (e) I don't know.

12, the size of the Milky Way is about () light years.

(a) less than 10 (b)1000 (c)100000 (d) more than100000 (e) I don't know.

13, see the sun and the moon from the earth, their apparent size ().

(a) About the same size (b) The sun is much bigger than the moon (c) The moon is much bigger than the sun.

(d) At least more than 20% (e) I don't know.

14. From the ground, Venus looks very bright on a clear night, but it is not so bright when the weather is bad or not very dark. In both cases, the magnitude of Venus ().

(a) No change; (b) There are some differences. The star equivalent is higher when it is dark.

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