learn.howToCalculate
learn.whatIsHeading
Kepler's third law relates orbital period to orbital distance. It explains why planets farther from the Sun take longer to orbit.
Công thức
The calculator applies T² = (4π² / GM) × a³
- GM
- GM value — Variable used in the calculation
Hướng dẫn từng bước
- 1Enter orbital period and distance, or the central body's mass
- 2The calculator applies T² = (4π² / GM) × a³
- 3Results show orbital relationship
Ví dụ có lời giải
đầu vào
a = 1 AU (Earth orbit), M = 1.989 × 10³⁰ kg (Sun)
Kết quả
T ≈ 1 year
By definition
Lỗi thường gặp cần tránh
- ✕Using incorrect AU values or unit conversions
- ✕Confusing period with frequency
Câu hỏi thường gặp
Does Kepler's law apply to all objects?
Yes, it applies to any orbit around a massive central body, from planets around stars to satellites around planets.
Why is period proportional to distance to the 3/2 power?
Gravity weakens with distance, requiring slower speeds at greater distances, which more than compensates for longer path length.
Sẵn sàng để tính toán? Dùng thử Máy tính Kepler Third Law miễn phí
Hãy tự mình thử →