ប្រអប់ខ្សាច់អ័ក្ស
ចាប់ផ្ដើមផ្កាយរណបទៅខាងឆ្វេង និងមើលវាធ្លាក់ត្រឡប់មកវិញ វិលជុំវិញភពផែនដី ឬគេចខ្លួន ។ បង្កើតអ័ក្សណាមួយ ហើយមើលច្បាប់របស់ Kepler ក្នុងសកម្មភាព ។
ESO/S. Guisard (www.eso.org/~sguisard) (CC BY 4.0)
ប្រអប់ខ្សាច់អ័ក្ស
What is an orbit? Throw a ball sideways and it curves down to the ground.Throw it faster and it lands farther away.Throw it fast enough and the ground curves away beneath it as quickly as it falls, so it never lands: it keeps falling around the planet and always misses.That is an orbit.Nothing holds a satellite up;it is falling all the time.
អ្វីដែលកើតឡើង:
ព្យាយាមក្នុងនេះ
ធ្លាក់ត្រឡប់ក្រោយ អូប៊ីត ជម្រះ
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កំណត់អ័ក្សឲ្យសម (ធាតុអ័ក្ស និងច្បាប់របស់ Kepler)
Astronomers describe an orbit with five numbers called orbital elements.Change them here;the height and speed above follow.
របៀបប្រើវា
- ល្បឿនចំហៀង
- This one control decides what happens.Too slow and it falls back.Fast enough and it goes round in a circle.Faster and it swings out into an ellipse.Faster than escape speed and it leaves for ever.The coloured bar under the slider shows where each begins at the chosen height.
- កម្ពស់
- Where it starts.Higher up, gravity is weaker, so a slower speed is enough to stay in orbit.
- ល្បឿនពេលវេលា
- Real orbits take hours, days or years, so time runs faster here.ពេលវេលា × 1,000 មានន័យថាវិនាទីនីមួយៗនៅលើអេក្រង់គឺ 1,000 វិនាទី (ប្រហែល 17 នាទី) ក្នុងចន្លោះ ។The planet's turning is sped up by the same amount.The numbers shown are always the real ones.
- បទដី
- The gold trail on the ground is the path directly beneath the satellite.Earth turns underneath the orbit, so each lap passes over different places.
- ព្រួញមាស
- Which way it is moving and how fast: the longer the arrow, the faster.
- មើលជុំវិញ
- Drag to turn the view, scroll or pinch to zoom.The faint grid is the plane of Earth's equator (or, around the Sun, the plane of Earth's orbit).
តារាងទិន្នន័យ (ជំនួសអត្ថបទ)
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