learn.howToCalculate
learn.whatIsHeading
Angular size (apparent size in sky) depends on object actual size and distance: θ ≈ size / distance (small angle approximation).
चरण-दर-चरण मार्गदर्शिका
- 1Input actual size and distance
- 2Calculate angular size in degrees, arcminutes, or arcseconds
- 3Compare to other celestial objects
हल किए गए उदाहरण
इनपुट
Moon: ~3476 km diameter, 384,000 km distance
परिणाम
Angular size ≈ 0.52° (match Sun size, hence solar eclipses)
सामान्य गलतियां जिनसे बचना है
- ✕Confusing angular and actual size
- ✕Forgetting distance effect on apparent size
अक्सर पूछे जाने वाले प्रश्न
Why do Moon and Sun look same size?
Coincidence: Sun 400× larger but 400× farther away.
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