In an Exoplanet System in Which a Gas Giant Has

question 74

Multiple Choice

In an exoplanet system in which a gas giant has an orbit very close to its star, how commonly have astronomers found other planets at larger orbital distances from the star?

• A) extremely rarely, because the migrating gas giant drives all the other planets into the star
• B) extremely rarely, because the migrating gas giant ejects all the other planets from the system
• C) extremely rarely, because the existence of a close-in gas giant implies that all the available material was accreted onto that planet
• D) in about half of such exoplanet systems

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