AST: OVERVIEW OF OUR PLANETARY
SYSTEM. EXAM QUESTIONS AND
ANSWERS 100% PASS 2026/2027
What is the most important reason that astronomers have learned more about our planetary
system in the last 30-40 years than all of history before then. - ANS We have been able to
send spacecraft to gather information about planets and moons up close.
The planet closest to the Sun in the solar system is: - ANS Mercury
Which planet in the solar system has not been examined by spacecraft instruments that have
either flown by or orbited them? - ANS
In the far future, a visiting tourist from another planetary system asks to see the most massive
object in our solar system. Where would you take him/her/it? - ANS the Sun
All the planets (without exception) - ANS revolve around the Sun in the same direction
The first trans-Neptunian object astronomers found (in 1930) is called - ANS Pluto
2026/2027 ALLRIGHTS RESERVED 1
SYSTEM. EXAM QUESTIONS AND
ANSWERS 100% PASS 2026/2027
What is the most important reason that astronomers have learned more about our planetary
system in the last 30-40 years than all of history before then. - ANS We have been able to
send spacecraft to gather information about planets and moons up close.
The planet closest to the Sun in the solar system is: - ANS Mercury
Which planet in the solar system has not been examined by spacecraft instruments that have
either flown by or orbited them? - ANS
In the far future, a visiting tourist from another planetary system asks to see the most massive
object in our solar system. Where would you take him/her/it? - ANS the Sun
All the planets (without exception) - ANS revolve around the Sun in the same direction
The first trans-Neptunian object astronomers found (in 1930) is called - ANS Pluto
2026/2027 ALLRIGHTS RESERVED 1
