The Two Chief Elements in the Sun Are

Q9: A star whose spectral lines are shifted

Q10: At the end of its period in

Q11: The sun has<br>A) no atmosphere.<br>B) an atmosphere

Q12: The majority of main-sequence stars are<br>A) blue.<br>B)

Q13: Advantages of a telescope in a spacecraft

Q15: Advantages of large reflecting telescopes include their

Q16: The earth's magnetic field influences<br>A) comets.<br>B) meteoroids.<br>C)

Q17: Neutron stars are about<br>A) the size of

Q18: Auroras consist of<br>A) colored clouds.<br>B) comet tails.<br>C)

Q19: The smallest of the following celestial objects