Ask Astro: How do scientists weigh celestial objects?

It’s true that you can’t simply place a planet or galaxy on a scale to measure how heavy it is. Luckily, astronomers have a few tricks up their sleeves for weighing celestial objects.

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Ask Astro: How do scientists weigh celestial objects?

How do scientists measure or calculate the weight of a planet?

Ask Astro: How do scientists weigh celestial objects?

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