Mysteries Department
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Questions

Research questions are the building block of our platform of scientific inquiry. Key questions are the ones at the heart of a mystery; every other question helps answer one of them.

5questions0answered2with no evidence yet
All mysteries
HD 139139, the "Random Transiter"
HD 139139, the "Random Transiter"2 key questions · 5 questions · 0 answered
Open the mystery
QuestionWhere it stands
KeyAre the 28 dips real changes in starlight, or an instrumental effect?
Most likelyThe dips are astrophysical, on star A or star B
Do the dips still occur?
Open3 answers, none ahead
Is the 507 ppm, 2.2-hour dip in TESS Sector 91 at BTJD 3778.55 real, and is it on star A or star B?
No evidence yetNo answers yet
KeyIf the dips are real, what causes them?
Open7 answers, none ahead
Which of the two stars dips?
No evidence yet3 answers, untested