The time required by moonlight to reach the earth is:
A.One second
B.1.3 second
C.2 seconds
D.3 seconds
A.One second
B.1.3 second
C.2 seconds
D.3 seconds
A.24 years
B.30 years
C.76 years
D.80 years
A.Size
B.Rotational speed
C.Mass
D.Temperature
A.Aurora australis and aurora borealis
B.Magnetic storms on the surface of the sun
C.Polar auroras
D.All of these
A.Saturn
B.Pluto
C.Mercury
D.Neptune
A.Earth
B.Sun
C.Venus
D.No single heavenly body
A.Particles
B.Short waves
C.Long waves
D.None of these
A.Mercury and Venus
B.Venus and Mars
C.Mercury and Pluto
D.Venus and Neptune
A.Outward stream of protons on the sun surface
B.Ionized gas
C.Plasma
D.All of these
A.Galactic unit
B.Light year
C.Cosmic kilometre
D.Steller mile