moocNew Concepts of the Universe课后答案(慕课2023课后作业答案)
47 min readmoocNew Concepts of the Universe课后答案(慕课2023课后作业答案)
Chapter 1 Introduction
1、课后课后Which one is 答案答案the subject of early astronomical research? ( )
A、celestial body
B、慕课The作业 sum of observed time, space and matter
C、The课后课后 structure of the universe
D、The答案答案 development of the universe
2、What methods does astronomy use to measure the position of celestial bodies?慕课 And explore their movement laws, study their physical properties, chemical composition, internal structure, energy sources, etc. ( )
A、Radiation emitted to the earth
B、作业Telescope observation.
C、课后课后Meteorites falling on the earth.
D、答案答案All of the above
3、慕课Which of the following is 作业not the most important scientific model of the 20th century?
A、Heliocentric solar system model
B、课后课后Basic particle model
C、答案答案Crustal plate model
D、慕课Big Bang universe model
4、Which of the following does not belong to Kepler's three laws of planetary motion based on observation and analysis?
A、All planets, including the earth, move in a circular motion at a constant speed around the sun
B、All planets orbit the sun in elliptical orbits. The sun is at a focal point of the ellipse
C、The area of the sagittal diameter connecting any planet to the sun is equal in equal time.
D、The square of a planet's orbit around the sun is proportional to the cube of its average distance from the sun.
5、Which of the following theories is least relevant to astronomy?
A、DNA double helix structure
B、Theory of relativity
C、Kepler's law
D、Quantum theory
6、Which of the following is not a research object of galaxy physics?
A、Determine the position of the celestial body
B、Confirm interstellar matter
C、Study the structure of galaxies
D、Study the evolution of galaxies
7、Which of the following statements about the international date change line is wrong?
A、The international date change line is a straight line
B、Cross the date change line from east to west, the date should be increased by one day.
C、A new day on earth is measured by the date change line
D、The international date change line is also called the date line, and the dates on both sides are different
8、When was the standard universe model first proposed?
A、1930s
B、1890s
C、1950s
D、1990s
9、Who is the gravitational discoverer?
A、Newton
B、Einstein
C、Planck
D、Maxwell
10、Who made the first reflective telescope?
A、Jucias
B、Newton
C、Malson
D、Cassegrain
11、According to research methods, astronomy can be roughly divided into ( )
A、Astrometry
B、Celestial
C、Astrophysics
D、cosmology
E、Galaxy
12、Which of the following statements about the international date change line are correct?
A、The international date change line is a straight line.
B、Cross the date change line from east to west, the date should be increased by one day.
C、A new day on earth is measured by the date change line.
D、The international date change line is also called the date line, and the dates on both sides are different.
E、Cross the date change line from west to east, the date should be increased by one day.
13、What do the following claims belong to Copernicus?
A、The sun is the center of the universe.
B、Earth rotates around its axis of rotation.
C、The moon revolves around the earth and makes a uniform circular motion.
D、All planets revolve around the sun in an elliptical orbit, and the sun is at a focal point of the ellipse.
E、The universe actually has no center.
14、According to research methods, astronomy can be roughly divided into ( )
A、Astrometry
B、Celestial mechanics
C、Astrophysics
D、Celestial kinematics
E、Space astronomy
15、What are the following correct statements about the laws of celestial body movement (in the solar system)?
A、All planets, including the earth, move in a circular motion at a constant speed around the sun.
B、All planets revolve around the sun in an elliptical orbit, and the sun is at a focal point of the ellipse.
C、The area of the sagittal diameter connecting any planet to the sun is equal in equal time
D、The square of a planet's orbit around the sun is proportional to the cube of its average distance from the sun.
E、The sun is still.
16、Modern astronomers rely on celestial mechanics to study celestial bodies, and the research tool is optical telescope.
17、The international date change line is a straight line.
18、(In the solar system) All planets rotate around the sun in an elliptical orbit, and the sun is at a focal point of the ellipse.
19、The orbit where the sun moves on the celestial sphere every year is called the ecliptic, and the plane where the ecliptic is located is called the ecliptic plane, which coincides with the equatorial plane.
20、Light and radio waves are essentially the same, both are electromagnetic waves. Radio waves are electromagnetic waves with longer wavelengths, and light is electromagnetic waves with shorter wavelengths.
Chapter 2 Solar System
Chapter 2 Solar System
1、The distance of an astronomical unit is( ).
A、Distance between sun and earth.
B、1 light year.
C、The distance between the sun and the moon.
D、The distance between the earth and the moon.
2、Which of the following does not belong to the solar atmosphere?
A、Sun core.
B、Photosphere.
C、Chromosphere.
D、Corona.
3、Which of the following statements about the earth is wrong?
A、The equatorial circumference is 4007.5 kilometers.
B、The average radius of the earth is 6371 kilometers.
C、The highest mountain on earth is 8848 meters above sea level.
D、The earth's deepest trench is -11,000 meters above sea level.
4、The temperature difference between day and night on the moon is ( ).
A、127 Celsius.
B、183 Celsius.
C、310 Celsius.
D、400 Celsius.
5、The astronomical tide we often say is ( ).
A、The sun, moon, and earth are on the same straight line, and the moon is between the sun and the earth.
B、The sun, moon, and earth are on the same straight line, and the earth is between the sun and the moon.
C、When the sun is closest to the earth.
D、None of the above answers are correct.
6、Which of the following does not belong to the three major categories of planets of the solar system (according to the mass, size and chemical composition of the planets)?
A、Inner planet
B、Terrestrial planet
C、Giant planet
D、Planet Alien
7、The largest planet in the solar system is ( ).
A、Jupiter
B、Earth
C、Venus
D、Sun
8、Which of the following statements about Venus is wrong?
A、Venus turns from west to east.
B、Venus is the brightest star in the sky.
C、Venus' atmospheric composition is mainly carbon dioxide.
D、The surface temperature of Venus is about 480 Celsius.
9、Among the moons of Saturn, the only atmosphere currently found (with nitrogen accounting for about 98%) is ( ).
A、Mimas
B、Tethys
C、Titan
D、Phoebe
10、Which of the following statements about Jupiter is wrong?
A、Jupiter's magnetic field is in the same direction as Earth's magnetic field.
B、The main component of the atmosphere is hydrogen.
C、The second celestial body with aurora phenomenon was discovered besides the earth.
D、It is a glowing celestial body.
11、Which of the following belongs to the inner planet?
A、Mercury
B、Venus
C、Earth
D、Saturn
E、Jupiter
12、Which of the following are dwarf planets?
A、Uranus
B、Neptune
C、Pluto
D、Ceres
E、Makemake
13、Which of the following statements about Venus are correct?
A、Venus turns from west to east.
B、Venus is the brightest star in the sky
C、The surface temperature of Venus is about 480 degrees Celsius.
D、Venus ’atmospheric composition is mainly carbon dioxide.
E、Venus surface pressure is up to 88 atmospheres.
14、Which of the following statements about the Earth's atmosphere are correct?
A、The main components are nitrogen and oxygen.
B、The atmosphere is mainly divided into three layers: troposphere, stratosphere, ionosphere.
C、The troposphere, also known as the ozone layer, absorbs the ultraviolet rays of the sun and is a protective layer for life on earth.
D、The stratosphere is the main place where weather phenomena occur.
E、Radio waves are propagated by the ionosphere
15、The discovery of methane on Mars indicates that there may be more active geological activities on Mars.
16、The largest "sea" on the moon is called the storm ocean, and it is mainly composed of fresh water.
17、The main components of the solar wind are protons and electrons, and a small amount of helium ions.
18、Venus is a terrestrial planet, so its rotation direction is the same as that of the earth.
Chapter 3 Stellar
Chapter 3 Stellar
1、In addition to the sun, it is currently found that the closest star to the earth is ().
A、Proxima
B、Sirius
C、Big Dipper
D、None of the above answers.
2、When the magnitudes of the two stars differ by five magnitudes, what is the brightness ratio?
A、5 times
B、25 times
C、75 times
D、100 times
3、What is the relationship between the apparent brightness of any light source and the distance from the light source to the observer?
A、The apparent brightness is proportional to the distance from the light source to the observer.
B、The apparent brightness is proportional to the square of the distance from the light source to the observer.
C、The apparent brightness is inversely proportional to the distance from the light source to the observer.
D、The apparent brightness is inversely proportional to the square of the distance from the light source to the observer.
4、Which of the following statements about stellar spectroscopy is wrong?
A、Spectral types are mainly divided into seven categories: O，B，A，F，G，K，M.
B、Each spectrum can be divided into ten subtypes.
C、B0 and O9 are very different.
D、O, B, A are early type, F, G are medium type, K, M are late type.
5、On the Hero diagram, the sun belongs to ( ).
A、Main sequence star
B、Red giant
C、white dwarf
D、Superstar
6、Which of the following statements about Cepheid variable stars is wrong?
A、Cepheid variable stars, also known as long-period Cepheid variable stars or classic Cepheid variable stars, are a type of pulsating variable star.
B、The brightness of such variable stars changes periodically.
C、The luminosity of such variable stars varies between 0.1 and 2.0.
D、According to a large number of studies on Cepheid variable stars, the longer the period of Cepheid variable stars, the smaller the average luminosity.
7、Which of the following statements about Nova is wrong?
A、Nova is a newly generated star.
B、The brightness of the nova will increase rapidly in a short period of time, and slowly decrease after reaching the maximum.
C、When the new star is the brightest, the absolute magnitude can reach -7.0.
D、When a star bursts, its spectral type is constantly changing.
8、Which of the following statements about Nebula is wrong?
A、The planetary nebula has the shape of a bright spot in the center of the telescope and a ring-shaped gas shell around it.
B、Planetary nebula glows by itself.
C、A diffuse nebula is an irregular cloud of interstellar gas or dust.
D、The diffuse nebula cannot shine.
9、What is a significant sign of strong solar activity?
A、Corona
B、sunspot
C、Prominence
D、Solar halo
10、Which of the following is hailed as a "gauge"?
A、Red giant
B、Long-period variable star
C、Lyra variable
D、Cepheid variable star
11、Which of the following statements about Nebula are correct?
A、The planetary nebula has the shape of a bright spot in the center of the telescope and a ring-shaped gas shell around it.
B、The planetary nebula glows by itself.
C、A diffuse nebula is an irregular cloud of interstellar gas or dust.
D、The diffuse nebula cannot shine.
E、The diffuse nebula consists of the nebula's core and ring-shaped shell.
12、Which of the following statements about Cepheid variable stars are correct?
A、Cepheid variable stars, also known as long-period Cepheid variable stars or classic Cepheid variable stars, are a type of pulsating variable star.
B、The brightness of such variable stars changes periodically.
C、The luminosity of such variable stars varies between 0.1 and 2.0.
D、According to a large number of studies on Cepheid variable stars, the longer the period of Cepheid variable stars, the smaller the average luminosity.
E、Cepheid variable stars are often hailed as "gauges".
13、According to modern stellar evolution theory, what stages can a star be divided into in its lifetime?
A、Gravitational contraction phase
B、Main sequence
C、Red giant stage
D、Outbreak phase
E、Dying stage
14、Which of the following statements about stars are correct?
A、The greater the stellar mass, the longer the life.
B、In theory, the minimum mass of a star can be 0.001 of the Sun.
C、The stellar spectrum consists of a continuous spectrum and absorption lines
D、The sun belongs to the main sequence stars in the stars.
E、There are three main methods for measuring the stellar angle diameter: lunar occultation, interferometry, and photometry.
15、Which of the following statements about star clusters and associations are correct?
A、From dozens to millions of stars gathered together, a group of stars with certain common physical properties is called a star cluster.
B、The Milky Way star cluster, also known as the evacuated cluster, has an irregular shape.
C、The Andromeda Cluster in the Milky Way is an open cluster.
D、The Star Association is mainly divided into two categories, OB Star Association and T Star Association.
E、The stars in the Association of Stars have roughly the same spectral type.
16、The greater the stellar mass, the shorter the life span.
17、If the measured △ λ> 0 of a star, then the star is close to the earth.
18、According to a large number of studies on Cepheid variable stars, the longer the period of Cepheid variable stars, the smaller the average luminosity.
19、The apparent brightness of any light source is inversely proportional to the square of the distance from the light source to the observer.
20、Cepheid variable stars are named after the Chinese in the Spring and Autumn Period.
Chapter 3 Stellar
1、What is the role of spectroscopic analysis of stars?
2、What is the Stellar Hero diagram? What is its connotation?
3、What are the characteristics of stars in the main sequence?
Chapter 4 Galaxy
Chapter 4 Galaxy
1、Galaxies are divided into two categories, they are ().
A、Bright and dark galaxies
B、Galaxy clusters and single galaxies
C、Large and small galaxies
D、Ellipses and swirls
2、Which of the following statements about the Milky Way is wrong?
A、The Milky Way can be roughly divided into two parts: the silver plate and the silver halo.
B、The silver disk is a dense disk-shaped planet, shaped like a discus.
C、The objects belonging to the silver disk include O-type stars, B-type stars, long-period Cepheid variable stars, etc.
D、The sun is on the silver plate, but not on the symmetrical surface of the silver plate.
3、Which of the following statements about normal galaxies and particular sex systems is wrong?
A、Normal galaxies are basically in a state of gravitational balance.
B、The radiation emitted by normal galaxies is thermal radiation.
C、The gravity of special galaxies is not balanced.
D、Its emission spectrum is all thermal radiation, there is no non-thermal continuous spectrum.
4、If the luminosity of the Cepheid variable star is dimmed by 1.5 magnitudes, how much is its original brightness?
A、1/2
B、1/4
C、2 times
D、4 times
5、Which of the following statements about quasars is wrong?
A、They have a very strong and wide emission line in their spectrum.
B、Their spectral lines have a very large blue shift, which is the largest blue shift among known celestial bodies.
C、There is strong ultraviolet radiation, so most quasars are blue.
D、Quasars are the general term for quasar power sources and blue stars.
6、Which of the following is not a recognized redshift explanation in physics?
A、Gravitational redshift
B、Doppler Redshift
C、Cosmology redshift
D、Hubble Redshift
7、The Hubble constant is proposed by ().
A、Hubble
B、Newton
C、Ball
D、Einstein
8、The diameter of the Milky Way is ( ).
A、300 parsecs
B、3000 parsecs
C、30000 parsecs
D、300000 parsecs
9、If a measured star △ λ> 0, then how does this star move?
A、Approaching earth.
B、Still.
C、Getting away from the earth.
D、There is no way to know whether it is correct.
10、Which of the following statements about the Seifert galaxy is wrong?
A、These galaxies are closer to Earth, mostly located within a dozen parsecs.
B、The observed feature of this galaxy is the bright star-shaped active galaxy core in the center.
C、It has an abnormal emission line.
D、The core of the galaxy has violent activity.
Chapter 5 Special Objects
Chapter 5 Special Objects
1、Which of the following statements about the white dwarf is wrong?
A、White dwarfs have higher surface temperatures and lower luminosity.
B、The spectral types of white dwarfs are all type A.
C、White dwarfs are very dense, about 105~108g / cm3.
D、White dwarfs have evolved from stars with a mass of 3 to 4 solar masses.
2、According to the modern theory of stellar evolution, which of the following is not derived from stars?
A、Pulsar
B、Black hole
C、white dwarf
D、nebula
3、What is the main reason why white dwarfs do not collapse?
A、The rotation speed is fast, and the generated centrifugal force is large, which is balanced with gravity.
B、The pressure generated by the degenerate electron gas is very large and is balanced with gravity.
C、The pressure generated by the thermal motion of the gas is very large and is balanced with gravity.
D、The radiation pressure is very large, which is balanced with gravity.
4、Which of the following statements about pulsars is wrong?
A、Pulsar was discovered by Bohr.
B、The pulsar's pulse signal is a radio signal, which is received in the radio band.
C、The pulsar's pulse period is very short and quite stable.
D、Pulsars can be divided into three types according to their pulse radiation shape: S type, C type, and D type.
5、Which of the following statements about neutron stars is wrong?
A、10 ~ 20 kilometers in diameter.
B、Very dense, 1014~1015g / cm3.
C、Surface temperature is very high, above 107K.
D、Neutron stars contain only neutrons and no separate electrons and protons.
6、The magnitude of the second cosmic velocity is () kilometers per second.
A、7.9
B、11.2
C、16.7
D、None of above.
7、Which of the following statements about black holes is correct?
A、Schwarzschild black hole: The simplest, high-speed spherical black hole.
B、Reslernorstrom black hole: spherically symmetric black hole with electric charge and no rotation.
C、Kerr black hole: black hole with charge and rotation.
D、Kerr-Newman black hole: black hole without charge and rotation.
8、The mass at the end of the neutron star formation should be ( ).
A、less than solar mass
B、less than 1.44 times solar mass
C、Greater than 3 times solar mass
D、Less than 3 times greater than 1.44 times solar mass
9、What are the powerful tools for detecting black holes, studying dark matter, and exploring the formation and evolution of galaxies?
A、Doppler effect
B、Hubble's Law
C、Mass-energy equation
D、Gravitational lens effect
10、What was the first black hole found?
A、Kirin V616
B、LMCX-1
C、Cygnus X-1 Black Hole
D、LMCX-3
Chapter 6 Cosmology
Chapter 6 Cosmology
1、Which is wrong about the Newton 's law of gravitation?
A、Strictly, it is suitable only for the mass point.
B、The magnitude of the gravitation is relative to the mass of the mass point and the distance.
C、Time and space are not independent in the law of gravitation.
D、The frame is Euclidean space.
2、Who predicted that the universe is expanded from the original atom after he got the expansion model of the universe, which is the originator of the Big bang theory?
A、Lemaitre.
B、Hawking.
C、Newton.
D、Einstein.
3、Assumed that density of the mass is critical mass density ρc when the curvature of the universe K=0, if the average mass density of the fluctuated region is larger than the critical mass density, then:
A、The universe is close.
B、The universe if flat.
C、Not for sure.
D、The universe is open.
4、U2 plane, flown in the high sky, has been used to carry on a key experiment, which proved that the background radiation doesn’t originate from the neighborhood part in the universe. This finding is called:
A、Special theory of relativity.
B、Theory of sky big cosine.
C、The big bang theory.
D、General theory of relativity.
5、Who proved that singularity is the inevitable corollary of general theory of relativity?
A、Penrose and Hawking.
B、Schwarzschild.
C、Einstein.
D、Laplace.
6、Which is not the property of the dark matter?
A、Long life.
B、Strong magnetic field.
C、Large mass.
D、Weak action.
7、Which doesn’t belong to Obers paradox?
A、Though the creation and vanishing of the stars, the number density of the stars in the universe is a constant in total.
B、Statistically, the law of the propagation of the light is the same everywhere when the luminescent intensity of the stars is assumed to be unchanged.
C、The universe is limited. In the limited space, the number of the stars is also limited.
D、Time is infinite. Stars can exist infinitely as a whole.
8、ESA corrected the age of the universe as ( ) based on the data provided by “Planck” probe in March, 2013.
A、9.82 billion years.
B、15.82 billion years.
C、11.82 billion years.
D、13.82 billion years.
9、Which is not the model of cosmology?
A、Alfvén celestial body.
B、Fatigue light cosmology.
C、Galaxies and antigalaxies.
D、Quasi-steady state model.
10、What is wrong about the special theory of relativity?
A、The establishment of the special theory of relativity makes that the gravitational field must be considered.
B、The special theory of relativity fundamentally changes the foundation of physics from Newton and is the cornerstone of the modern physics.
C、It is suitable for inertial system and noninertial system.
D、It profoundly describes time, space, matter and motion.
Chapter 7 Extraterrestrial Life
Chapter 7 Extraterrestrial Life
1、Which is not the feature of life?
A、They have the ability to propagation.
B、They have the active ability to change themself to adapt to the environment.
C、They are mainly made up of carbon, hydrogen, oxygen, nitrogen, etc.
D、They must have the ability to make and use tools
2、The formation of the original life can roughly be divided into three phase, which doesn’t belong to the three phase?
A、The large molecules decompose into small molecular components.
B、Generation of the complex large molecules structures-amino acid and nucleotide.
C、Amino acids and nucleotides synthesize proteins and nucleic acids.
D、Inorganic matters synthesize simple carbide.
3、Which is the necessary condition for the existence of lives?
A、Proper temperature
B、Existence of liquid water
C、Proper distance to the stars
D、In the solar system
4、Which is true about the tendency of the development of lives?
A、From water to land
B、From asexual to sexual reproduction
C、From eukaryotic cells to prokaryotic cells
D、From multicellular to unicellular
5、The method of human exploring the extraterrestrial lives can be divided into?
A、Radio and optical communications
B、Space detector
C、Acoustic communication
D、manned spacecraft
6、The environment of Earth and lives interactive and interplay with each other.
7、The premise of all natural science study is acknowledging the materiality of the universe and the unity of its laws.
8、The search for the extraterrestrial lives of human has already extended beyond the solar system.
9、The spirit rover and the Mars opportunity rover of America have finished the exploration of the Mercury.
10、The findings of the UFO mostly are misunderstanding and mistakes of the known objects, phenomena and lives.
Chapter 8 Hawking's Universe
Chapter 8 Hawking's Universe
1、Hawking and Hartle jointly published ( ) in 1983, which creates the new era of the Quantum cosmology.
A、Gravitation.
B、The wave function of the universe.
C、Quantum theory.
D、A brief history of time.
2、Which is not the property of the singularity?
A、The matter density is infinite.
B、The pressure is infinite.
C、The volume is infinite.
D、The time and space are infinitely curved.
3、Which theory is the most hopeful theory that can unify the gravitation and the other three force (electromagnetic force, weak force and strong force)?
A、Supergravity
B、Quantum theory of gravity
C、Supersymmetry theory
D、Holographic theory
4、Which is wrong about the black hole?
A、The temperature of the black hole is only dependent on the quality characteristic of the black hole.
B、Particles don’t come from the black hole.
C、The black hole satisfies the unsubtracted area theorem.
D、There is not radiation of the black hole.
5、Which is right about the Holographic principle?
A、Diffraction recording, diffraction recurrence
B、Interference recording, diffraction recurrence
C、Interference record, interference recurrence
D、Diffraction recording, interference recurrence
6、Modern theoretical academic community are used to calling physics before him classical mechanics and physics after him modern physics.
A、Newton
B、Einstein
C、Hawking
D、Planck
7、Who proposed the assumption of electromagnetic radiation and energy absorption quantization, by which he explained the question of black-body radiation successfully in 1900?
A、Hawking
B、Planck
C、Einstein
D、Penrose
8、Which is first mathematical announcement of the human civilization about the fortune of time and space, which is called “One small step in mathematics, one giant leap in cosmology” by scientific community.
A、The law of gravitation
B、The singularity theorem
C、The big bang theory
D、The doppler effect
9、Who proved the singularity theorem?
A、Laplace
B、Penrose and Hawking
C、Einstein
D、Schwarzschild
10、The uncertainty principle is hawking's idea.
Final Exam
Examination
1、The most important scientific model of the 20th century does not include ()
A、Crust plate model
B、Heliocentric solar system model
C、Elementary particle model
D、Big Bang universe model
2、The distance of an astronomical unit is ()
A、The distance between the sun and the moon
B、Earth-Moon Distance
C、1 light year
D、The distance between the sun and the earth
3、The following statement about Venus is wrong ()
A、Venus is the brightest star in the sky.
B、Composition of Venus’ atmosphere is mainly carbon dioxide.
C、The surface temperature is about 480 degrees Celsius.
D、Venus turns from west to east.
4、Except for the sun, it is currently found that the closest star to Earth is ().
A、Big Dipper
B、Sirius
C、Proxima
D、None of the above answers
5、On the Hero diagram, the sun belongs to ().
A、Superstar
B、Red Giant
C、White dwarf
D、Main sequence star
6、The following statement about the Milky Way is wrong ()
A、Objects belonging to the silver disk include O-type stars, B-type stars, long-period Cepheid variable stars, etc.
B、The silver disk is a disk-shaped dense area of planets, shaped like a discus.
C、The sun is on the silver plate, but not on the symmetrical surface of the silver plate.
D、The Milky Way can be roughly divided into two parts: silver plate and silver halo.
7、When the magnitude difference between the two stars is 5th, the brightness ratio is ().
A、100
B、1000
C、1
D、10
8、Which of the following is the main reason why white dwarfs do not collapse？
A、The pressure generated by the thermal motion of the gas is very large and is balanced with gravity.
B、Since the rotation speed is fast, the generated centrifugal force is very large, which is balanced with gravity.
C、Radiation pressure is very large, and balance with gravity.
D、The pressure generated by the degenerate electron gas is very large and is balanced with gravity.
9、The magnitude of the second cosmic velocity is () kilometers per second.
A、7.9
B、11.2
C、16.7
D、None of the above
10、The astronomical tide we often say is ().
A、A. The sun, moon and earth are on the same straight line, and the moon is between the sun and the earth.
B、The sun, moon and earth are on the same straight line, and the earth is between the sun and the moon.
C、When the sun is closest to the earth.
D、None of the above answers
11、Which of the following belongs to the inner planet?
A、Saturn
B、Earth
C、Mercury
D、Venus
12、Which of the following statement about the international date change line is correct?
A、Cross the date change line from east to west, the date should be increased by one day.
B、The international date change line is also called the date line, and the dates on both sides are different.
C、A new day on the earth is measured from the date change line.
D、The international date change line is a straight line.
13、Which is not the property of the dark matter?
A、Great quality
B、Strong magnetic field
C、Long life
D、Weak effect
14、In order to make the planet produce a civilization similar to the earth, which of the following is necessary?
A、The size and quality should be appropriate to maintain the atmosphere.
B、Proper distance from stars.
C、The environment should be stable and relatively safe.
D、There must be liquid water.
15、Which of the following statements about the Earth ’s atmosphere are correct?
A、The troposphere, also known as the ozone layer, absorbs the sun ’s ultraviolet rays and is a protective layer for life on Earth.
B、The stratosphere is the main place where weather phenomena occur.
C、The atmosphere is mainly divided into three layers: troposphere, stratosphere, ionosphere.
D、The main components are nitrogen and oxygen.
16、The greater the stellar mass, the shorter the life.
17、The largest "sea" on the moon is called the storm ocean and is mainly composed of fresh water.
18、If a measured star △ λ> 0, then this star is close to the earth.
19、The stratosphere, also known as the ozone layer, absorbs ultraviolet rays and is a protective layer for life on earth.
20、The apparent brightness of any light source is inversely proportional to the square of the distance from the light source to the observer.
中国大学New Concepts of the Universe
随着科学技术的不断发展，人类对宇宙的认知也在不断深入。为了更好地探索宇宙奥秘，中国大学推出了New Concepts of the Universe课程，使学生们能够更全面地了解宇宙。
课程目标
此课程旨在教授学生宇宙学的基础知识，包括宇宙演化、宇宙微波背景辐射、宇宙大尺度结构等内容。通过这些知识的学习，学生们将会对宇宙的各个方面有更深刻的理解和认识。
课程内容
课程内容主要包括以下几个方面：
- \t
- 宇宙学基础知识 \t
- 宇宙演化 \t
- 宇宙微波背景辐射 \t
- 宇宙大尺度结构
宇宙学基础知识
此部分主要介绍了宇宙学的基本概念，包括宇宙学原理、宇宙学原始核合成、宇宙学常量等等。学生们可以通过此部分的学习，对宇宙学有更全面的认识。
宇宙演化
宇宙演化是研究宇宙从诞生到现在的过程。学生们将会了解到宇宙大爆炸、暗物质、暗能量、星系形成等与宇宙演化相关的知识。
宇宙微波背景辐射
宇宙微波背景辐射是宇宙宏观结构研究中的一个非常重要的成果。学生们将会了解到宇宙微波背景辐射的发现、测量和分析，以及它对宇宙演化的重要作用。
宇宙大尺度结构
宇宙大尺度结构是研究宇宙中大规模分布的物质结构，包括星系、星系团、超星系团等。学生们将会了解到宇宙大尺度结构的形成、演化，以及对宇宙学研究的意义。
实践环节
在课程的实践环节中，学生们将会利用宇宙数据进行分析和研究，以提高他们的实践能力和科研能力。
结语
通过学习此课程，学生们将会对宇宙有更全面的认识和了解，增强他们的科学素养和科学研究能力。希望这个课程能够为未来宇宙探索和研究提供更好的人才支持。
