Supernova is:
A.An asteroid
B.A dying star
C.A comet
D.A black hole
A.An asteroid
B.A dying star
C.A comet
D.A black hole
A.Venus
B.Mercury
C.Mars
D.Earth
A.600
B.6000
C.500
D.5000
A.After it enters the atmosphere of the earth
B.After it enters the earth’s atmosphere and explodes in the mid air as a ball of fire
C.After it enters the earth’s atmosphere and lands on the surface of the earth without exploding in mid air
D.Before it enters the earth’s atmosphere
A.Circular and elliptic
B.Circular and hyperbolic
C.Elliptic and parabolic
D.Parabolic and hyperbolic
A.Mars and Jupiter
B.Earth and Mars
C.Jupiter and Saturn
D.Mercury and Venus
A.3 light-years
B.4 light-years
C.5 light-years
D.6 light-years
A.earth
B.Mars
C.Jupiter
D.Saturn
A.Jupiter, Saturn, Uranus, Neptune
B.Saturn, Jupiter, Uranus, Neptune
C.Uranus, Neptune, Saturn, Jupiter
D.Jupiter, Uranus, Saturn, Neptune
A.Mercury
B.Venus
C.Mars
D.Jupiter