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A star can dim.
How do we find a planet we cannot see?
A steady star. Tap the picture. What happens if something passes?Diagram · Something else changedThe evidence is what the star does.
A tug. A dimming. A beat that repeats. One effect can have more than one cause.
An unseen thing can show itself by what it does.
Keep looking
There is more in this room, if you want it.
Something else changed · Evidence strongly supports this
What else would you want to check?
A Match Is Not Enough