Hot Jupiters Were a Surprise to Astronomers

question 10

Multiple Choice

Hot Jupiters were a surprise to astronomers. What is the current explanation for their existence?

• A) Jupiters form as a companion to the host star, but fail to become actual stars themselves because they are not massive enough.
• B) Jupiters are supposed to form far away from their host star, then they migrate closer through gravitational interactions with the protoplanetary disk.
• C) The temperature of the hot Jupiters is highly uncertain, so they might not be as hot as the astronomers say.
• D) Jupiters actually can form close to the host star, since they do not require as much hydrogen compounds and ice as originally thought.

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