30) A rocky leftover planetesimal orbiting the Sun is

22) After Mars, the next most likely candidates for life in the Solar System are

5) To detect an exoplanet by means of the Doppler shift, you look for a periodic shift of the spectrum lines:

34) Which of the following methods has led to the most discoveries of massive planets orbiting near their parent stars?

27) What is the Sun made of?

18) What is the largest dwarf planet discovered to date?

39) Meteorites can come from

36) The transit method of planet detection works best for

48) Why are solar neutrinos so difficult to detect?

30) A rocky leftover planetesimal orbiting the Sun is