गुरुत्वाकर्षण और कक्षाएँ
तारे, ग्रह और चंद्रमा छोड़ें और न्यूटन के गुरुत्वाकर्षण नियम के तहत असली कक्षाएँ बनते देखें।
यह कोई एनिमेशन नहीं, बल्कि वास्तविक न्यूटोनियन गुरुत्वाकर्षण है। एक प्रीसेट चुनें या कैनवास पर खींचकर कोई पिंड छोड़ें, फिर उसका द्रव्यमान, दूरी, कक्षीय गति और केप्लर आवर्तकाल वास्तविक इकाइयों में पढ़ें।
प्रीसेट
चयनित पिंड
किसी पिंड पर टैप करें ताकि उसका द्रव्यमान, दूरी, गति और कक्षीय आवर्तकाल देख सकें।
ऊर्जा विचलन: 0.000%
स्थिरांक और स्रोत
G = 4π² AU³·M☉⁻¹·yr⁻²
1 AU = 1.496×10¹¹ m
1 M☉ = 1.989×10³⁰ kg
1 AU/yr = 4.741 km/s
T² = a³/M (Kepler)
The units and constants behind these orbits
This simulation does not work in metres and kilograms — it works in astronomical units, solar masses and years, because that is what keeps the numbers human-sized. Here is what each one is worth in SI.
What you are changing
The constant in the law
- G = 6.67430 × 10⁻¹¹ m³ kg⁻¹ s⁻² Newtonian constant of gravitation · the least precisely known of the fundamental constants
What this simulation's units are worth in SI
| Unit | In SI | Where it comes from |
|---|---|---|
| 1 AU | 149,597,870.7 km | Defined exactly since 2012 (IAU) — originally the mean Earth–Sun distance |
| 1 M☉ | 1.98892 × 10^30 kg | Mass of the Sun; the Solar System's natural mass yardstick |
| 1 M⊕ | 5.9720 × 10^24 kg | Mass of the Earth, for comparison — the Sun is about 333,000 times heavier |
| 1 yr | 365.25 days | The Julian year used in astronomy, not the calendar year |
Values come from the same constants the simulation integrates with (lib/physics/gravityOrbits.ts), so what you see here is what it actually computes.
The constant we know worst
Every value in this simulation rests on G = 6.67430 × 10⁻¹¹ m³ kg⁻¹ s⁻². Its standard uncertainty is ±1.5 × 10⁻¹⁵, about 22 parts per million — thousands of times worse than the speed of light or the Planck constant, which are exact by definition. Gravity is the force we can least precisely measure.
Compare it with the other constants and their uncertainties →