If it is midnight in New York, it is
A) daytime in Sydney, Australia.
B) midnight in Sydney, Australia.
C) midnight in Los Angeles.
D) midday in Rio de Janeiro, Brazil.
E) midnight everywhere.
A
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How many planets are there in our Solar System?
A. 9 B. 1 C. 4 D. 8
The number of comets in the Oort cloud is probably about
A) a thousand. B) a million. C) a billion. D) a trillion. E) a quintillion.
According to present understanding, which of the following statements about the solar wind is not true?
A) It is even stronger today than it was when the Sun was young. B) It helped in the transfer of angular momentum from the young Sun to particles that blew into interstellar space, which explains why the Sun rotates so slowly today. C) It swept vast amounts of gas from the solar nebula into interstellar space. D) It consists of charged particles blown off the surface of the Sun.
Radio maps of the spiral arms of our galaxy Group of
a.They map the location of dense neutral hydrogen clouds b.They map the location of hot O and B stars by the radio radiation they emit c.They reveal that the Sun is currently located in the centre of a spiral arm d.They reveal that our galaxy is a grand design spiral