Conceptual Integrated Science (3rd Edition)
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Due to the revolution of earth. ; Earth circles ... more
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Due to the earth’s rotation about its own axis. ; ... more
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The distance that light travels in one year is one... more
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Stars emit different frequencies of ... more
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Apparent Brightness ... more
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It is known as the Hertzsprung-Russell diagram ... more
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Along the main sequence. ; The H-R diagram shows ... more
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On the main sequence. ; The H-R diagram shows the ... more
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Thermal pressure and the force of gravitation. ; ... more
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Lifetime of a celestial body(S) depends upon its ... more
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Stellar explosions produced all the elements ... more
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Black hole is created by the gravitational ... more
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Because of not having enough mass to create ... more
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The discovery of star Cygnus X-1 which emits X-ray... more
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Spiral galaxy. ; A galaxy is said to be spiral if ... more
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A galaxy in which stars are forming at an usually ... more
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Three. ; Cluster of galaxies in which the Milky ... more
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Universe, initially, was not that of the same size... more
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A star’s luminosity is the amount of emitted light... more
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14 billion years ; According to Hubble's law the ... more
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By its gravitational effect. ; There are mainly ... more
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Wilkinson Microwave Anisotropy Probe. ; It is an ... more
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In the universe ordinary matter was only about 4% ... more
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Due to the absence of radio signals for ... more
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, and Rest of the variables. ; The equation used ... more
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Westward.It gets obscured.No. ; Stars move in a ... more
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Because of the earth’s revolution.West.Because ... more
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Earth’s north pole points very nearly in the ... more
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The motion in which position of the object changes... more
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The radius of a giant star is greater as its size ... more
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A red giant is a huge star greater than the Sun ... more
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Nuclear fuels are used in nuclear reactors in ... more
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The solar system is a collection of major planets ... more
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is a heavier element compared to and . , in the... more
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An ordinary matter or simply matter, is one that ... more
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Star A will be brighter than star B.Both will have... more
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; Light year is an astronomical unit for distance... more
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; The galaxy(MW) is the spiral shaped galaxy ... more
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; One light year is an astronomical unit for ... more
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A galaxy is a collection of celestial bodies like ... more
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It is not possible, but in rare cases of a ... more
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We are able to see stars only at night, when the ... more
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Because satellite(M) does not have any atmosphere... more
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The relative position of the stars would change at... more
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Daily motion results from the rotation of the ... more
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The Sun.The Sun appears to move from east to west ... more
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12 hours. ; The large pattern of stars consisting ... more
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The Big Dipper lies in the northeast sky.The North... more
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Daily. ; The Earth moves eastward or rotates about... more
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By observing its color. ; The color of stars ... more
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It depicts its temperature, size and age. ; The ... more
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Blue star ; The frequency of the emitted radiation... more
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Because it does not lie in the visible human’s ... more
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The frequency of the emitted radiation is directly... more
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The frequency of the emitted radiation is directly... more
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When a giant celestial body(S) is nearing the end ... more
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Protostars get the energy from the collapse of the... more
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Because the star(S) has limited life. ; Star(S) ... more
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The elements are arranged systematically in the ... more
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Its color is gonna be shifted to a higher ... more
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Because of the relatively slow burning rate. ; A ... more
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Because there are enough protons and electrons to ... more
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A planetary nebula is formed from the outer layer ... more
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Thermal pressure outward and gravitational force ... more
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The start of thermonuclear fusion.The ... more
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It should change into a white dwarf. ; The star(S... more
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When the star has sufficient gravity, the heat ... more
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All the atoms that exist now were a part of stars ... more
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As such a heavy element, , is created during a ... more
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Stars are a huge mass of dust and gasses formed by... more
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Those stars are younger than star (S). ; In stars... more
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Because below that limit in the case of star ... more
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Thermal pressure. ; Main-sequence stars remain in ... more
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Because nuclear fusion reactions require a very ... more
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Due to the difference in fusion rate of hydrogen... more
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Because they are brighter and short lived. ; The ... more
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Because it requires greater pressure and ... more
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NoThe main distinction is the consumption of ... more
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The frequency of the light will increase. ; Light... more
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Dying stars having cores greater than 3 or more ... more
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Because a black hole is so dense and has a more ... more
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No.No.It will become a red giant due to its mass... more
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Due to its gravitational pull. ; A black hole is ... more
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Milky way galaxy. ; The collection of celestial ... more
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Yes.The Andromeda galaxy, triangulum galaxy and ... more
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A galactic center is the center of the galaxy. An ... more
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From afar both of them seem like a single solid ... more
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Their appearance is almost the same. ; A galaxy ... more
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The number of habitable planets present in the ... more
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The term which stands for lifetime of a ... more
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Search for ExtraTerrestrial Intelligence.Every ... more
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Universe is space. It's the cosmos which contains ... more
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Throughout the Universe. ; It is the idea that the... more
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At the time of the Big Bang. ; Helium is the ... more
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Frequency of light gets decreased. ; As light ... more
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Gravitational field of attraction is a force that ... more
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More. ; When the universe had its origin, it was ... more
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From the big bang event. ; Helium is the second ... more
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No. ; The big bang was a process by which ... more
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FalseBecause used helium in that case is a result ... more
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By observing their effects on visible objects. ; ... more
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Hydrogen and helium. ; Stars are celestial bodies ... more
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It would be difficult to discover the laws. ; The ... more
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Gravity. ; Light bends in the presence of gravity ... more
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Because of their high kinetic energy. ; Dark ... more
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It still remains a mystery. ; Dark matter is a ... more
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Dark matter attracts while dark energy repels ... more
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Because the distance between those stars from the ... more
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Density of the universe determines the fate of the... more
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Astronomy is a science which studies the actual ... more
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Neither there would have been any human ... more
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Because science is true and there is a totality of... more
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Because there are many unanswered questions and ... more
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Spin of the planet(E) about its polar axis causes ... more
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Polaris is a star which is called the North star. ... more
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Star(PC) is a small star which is located in a ... more
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Luminosity is the measure of brightness of a star... more
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Stars with low mass have less percentage of ... more
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The process by which a star changes over a course ... more
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A galaxy in which the rate of star formation is ... more
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By determining the age of the oldest star, tracing... more
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Cosmic radiations are the radiations which hit the... more
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Dark matter is not an ordinary matter. It is ... more