which one is the subject of early astronomical research? ( )
what methods does astronomy use to measure the position of celestial bodies? and explore their movement laws, study their physical properties, chemical composition, internal structure, energy sources, etc. ( )
which of the following is not the most important scientific model of the 20th century?
which of the following does not belong to kepler's three laws of planetary motion based on observation and ysis?
which of the following theories is least relevant to astronomy?
which of the following is not a research object of galaxy physics?
which of the following statements about the international date change line is wrong?
when was the standard universe model first proposed?
who is the gravitational discoverer?
who made the first reflective telescope?
which of the following statements about the international date change line are correct?
what do the following claims belong to copernicus?
what are the following correct statements about the laws of celestial body movement (in the solar system)?
modern astronomers rely on celestial mechanics to study celestial bodies, and the research tool is optical telescope.
the international date change line is a straight line.
(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.
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.
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.
the distance of an astronomical unit is( ).
which of the following does not belong to the solar atmosphere?
which of the following statements about the earth is wrong?
the temperature difference between day and night on the moon is ( ).
the astronomical tide we often say is ( ).
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)?
the largest planet in the solar system is ( ).
which of the following statements about venus is wrong?
which of the following statements about jupiter is wrong?
which of the following belongs to the inner planet?
which of the following are dwarf planets?
which of the following statements about venus are correct?
which of the following statements about the earth's atmosphere are correct?
the discovery of methane on mars indicates that there may be more active geological activities on mars.
the largest "sea" on the moon is called the storm ocean, and it is mainly composed of fresh water.
venus is a terrestrial planet, so its rotation direction is the same as that of the earth.
in addition to the sun, it is currently found that the closest star to the earth is ().
what is the relationship between the apparent brightness of any light source and the distance from the light source to the observer?
which of the following statements about stellar spectroscopy is wrong?
on the hero diagram, the sun belongs to ( ).
which of the following statements about cepheid variable stars is wrong?
which of the following statements about nova is wrong?
which of the following statements about nebula is wrong?
what is a significant sign of strong solar activity?
which of the following is hailed as a "gauge"?
which of the following statements about nebula are correct?
which of the following statements about cepheid variable stars are correct?
which of the following statements about stars are correct?
which of the following statements about star clusters and associations are correct?
the greater the stellar mass, the shorter the life span.
if the measured △ λ> 0 of a star, then the star is close to the earth.
the apparent brightness of any light source is inversely proportional to the square of the distance from the light source to the observer.
what is the role of spectroscopic ysis of stars?
what is the stellar hero diagram? what is its connotation?
what are the characteristics of stars in the main sequence?
galaxies are ided into two categories, they are ().
which of the following statements about the milky way is wrong?
which of the following statements about normal galaxies and particular sex systems is wrong?
which of the following statements about quasars is wrong?
which of the following is not a recognized redshift explanation in physics?
the diameter of the milky way is ( ).
if a measured star △ λ> 0, then how does this star move?
which of the following statements about the seifert galaxy is wrong?
which of the following statements about the white dwarf is wrong?
what is the main reason why white dwarfs do not collapse?
which of the following statements about pulsars is wrong?
which of the following statements about neutron stars is wrong?
the magnitude of the second coic velocity is () kilometers per second.
which of the following statements about black holes is correct?
the mass at the end of the neutron star formation should be ( ).
what was the first black hole found?
which is wrong about the newton 's law of gravitation?
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?
who proved that singularity is the inevitable corollary of general theory of relativity?
which is not the property of the dark matter?
which doesn’t belong to obers paradox?
esa corrected the age of the universe as ( ) based on the data provided by “planck” probe in march, 2013.
which is not the model of coology?
what is wrong about the special theory of relativity?
which is not the feature of life?
the formation of the original life can roughly be ided into three phase, which doesn’t belong to the three phase?
which is the necessary condition for the existence of lives?
which is true about the tendency of the development of lives?
the method of human exploring the extraterrestrial lives can be ided into?
the environment of earth and lives interactive and interplay with each other.
the search for the extraterrestrial lives of human has already extended beyond the solar system.
the spirit rover and the mars opportunity rover of america have finished the exploration of the mercury.
which is not the property of the singularity?
which theory is the most hopeful theory that can unify the gravitation and the other three force (electromagnetic force, weak force and strong force)?
which is wrong about the black hole?
which is right about the holographic principle?
modern theoretical academic community are used to calling physics before him classical mechanics and physics after him modern physics.
who proved the singularity theorem?
the uncertainty principle is hawking's idea.
the most important scientific model of the 20th century does not include ()
the distance of an astronomical unit is ()
the following statement about venus is wrong ()
except for the sun, it is currently found that the closest star to earth is ().
on the hero diagram, the sun belongs to ().
the following statement about the milky way is wrong ()
which of the following is the main reason why white dwarfs do not collapse？
the magnitude of the second coic velocity is () kilometers per second.
the astronomical tide we often say is ().
which of the following belongs to the inner planet?
which of the following statement about the international date change line is correct?
which is not the property of the dark matter?
in order to make the planet produce a civilization similar to the earth, which of the following is necessary?
which of the following statements about the earth ’s atmosphere are correct?
the greater the stellar mass, the shorter the life.
the largest "sea" on the moon is called the storm ocean and is mainly composed of fresh water.
if a measured star △ λ> 0, then this star is close to the earth.
the stratosphere, also known as the ozone layer, absorbs ultraviolet rays and is a protective layer for life on earth.
the apparent brightness of any light source is inversely proportional to the square of the distance from the light source to the observer.