1.) Who dens is a neutron star?
5,000 t/cm3
50,000 t/cm3
700,000 t/cm3
300,000.000 t/cm3
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2.) Which type of galaxy is our galaxy?
a dwarf galaxy
an elliptical galaxy
a spiral galaxy
an irregulary galaxy
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3.)Which distance do the light make in one year?
9,460,000,000,000 km
9,460,000,000 km
9,460,000 km
9,460 km
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4.) Since how much years do the sun exist?
since 300,000 years
since 4,000,000 years
since 50,000,000 years
since 5,000,000,000 years
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5.) When do heavy liek Uranium elements can be formed?
in a supernova
in the formation of a star
in a white dwarf
in a brown dwarf
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6.) Which are the hotest stars?
yellow stars
red stars
blue stars
white stars
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7.) How does the energy is formed which a stars emits?
throught fusion
throught nuclear fission
throught nuclear decays
throught electrons
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8.) When was the Big Bang?
since 3,000,000 years
since 20,000,000 years
since 500,000,000 years
since 15,000,000,000 years
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9.) Which power is the weakest of the fundamental powers?
the weak power
the gravity
the strong power
the electromagnetic power
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10.) How much light-years is the Andromeda galaxy away of us?
400,000 light-years
2,200,000 light-years
30,000,000 light-years
3,000,000,000 light-years
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11.) How long does red stars live?
100,000 years
10,000,000 years
1,000,000,000 years
100,000,000,000 years
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12.) What is the final product of the proton proton cycle?
He-4 and two protons
He-4 and two neutrons
He-3 and two protons
He-3 and two neutrons
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13.) What will our sun left when it dies?
a neutron star
a white dwarf
a black hole
a quasar
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14.) Why neutron stars are pulsares?
because their size change
because their temperature change
because their atmosphere change
because they emit radio waves
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15.) Why is not our sun a star of the first generation?
because it is to bright
because it is to big
because it contains heavy elements
because the proton proton cycle is too fast
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