You Observe Neptune as It Occults a Background Star When

question 81

Multiple Choice

You observe Neptune as it occults a background star when the relative velocity between Neptune and the Earth is 30 km/s, and the star crosses through the middle of the planet and disappears for 27.6 minutes. What is Neptune's diameter?

• A) 5 * 10⁴ km
• B) 800 km
• C) 4,000 km
• D) 9 *10³ km
• E) 3 * 10⁶ km

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