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Gravity, Kepler's laws, orbital elements, speeds, escape, the rocket equation and how spacecraft travel between worlds.
NASA/JPL/Space Science Institute
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Newtonun kütlə çəkilişi
- Newton's gravity · 12 min Bitdi
One law explains falling apples, the Moon's orbit and the path of every planet. Fire Newton's cannon and find out how.
- Newton's gravity · 12 min Bitdi
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Kepler qanunları
- Kepler's laws · 14 min Bitdi
Three rules found from careful observations in the early 1600s still describe every orbit, from moons to exoplanets.
- Kepler's laws · 14 min Bitdi
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Elementlər
- Orbital elements · 14 min Bitdi
Six numbers pin down any orbit in space: its size, shape, tilt, orientation and where the body is on it.
- Orbital elements · 14 min Bitdi
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Orbital sürəti: vis-viva tənliyi
- Orbital speed: the vis-viva equation · 12 min Bitdi
One short equation gives the speed of anything in orbit at any point, if you know how far it is and the size of its orbit.
- Orbital speed: the vis-viva equation · 12 min Bitdi
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Sür'ət
- Escape velocity · 12 min Bitdi
How fast do you need to go to leave a world for good? And why rockets do not actually need to reach it at the surface.
- Escape velocity · 12 min Bitdi
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Niyə orbit bir düşəndir
- Why an orbit is a fall · 10 min Bitdi
Astronauts float not because there is no gravity up there, but because they are falling all the time, and missing.
- Why an orbit is a fall · 10 min Bitdi
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Orbitala çatır: kütlə çəkilişi dönür
- Reaching orbit · 12 min Bitdi
Why rockets go up for only a few seconds, then spend ten minutes going sideways: the gravity turn, staging and orbital insertion.
- Reaching orbit · 12 min Bitdi
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Raket tənliyi və delta-v
- The rocket equation and delta-v · 12 min Bitdi
Why rockets are mostly fuel, why they come in stages, and the one equation behind every mission's budget.
- The rocket equation and delta-v · 12 min Bitdi
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Hohmann transferləri
- Hohmann transfers: changing orbits · 12 min Bitdi
To go higher you speed up, and then you arrive slower. The two-burn manoeuvre that moves satellites from low orbit to geostationary orbit.
- Hohmann transfers: changing orbits · 12 min Bitdi
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Pəncərələri başlat
- Launch windows: the road to Mars · 12 min Bitdi
You cannot aim at Mars, only at where Mars will be in eight months. Why Mars missions leave every 26 months, all at once.
- Launch windows: the road to Mars · 12 min Bitdi
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Orbital daxiletmə: alınır
- Orbital insertion: getting captured · 12 min Bitdi
Arriving at a planet is the most dangerous minute of a mission: one burn decides whether you stay or fly past forever.
- Orbital insertion: getting captured · 12 min Bitdi
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Gravity yardımları
- Gravity assists: the free slingshot · 12 min Bitdi
How Voyager, Cassini and New Horizons stole speed from planets, and why it never breaks the conservation of energy.
- Gravity assists: the free slingshot · 12 min Bitdi
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Lagrange nöqtələri
- Lagrange points: balance in the sky · 11 min Bitdi
Five places around every pair of worlds where a spacecraft can ride along for free, and why the James Webb Space Telescope lives at one of them.
- Lagrange points: balance in the sky · 11 min Bitdi
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Rendezvous və docking
- Rendezvous: catching the space station · 11 min Bitdi
To catch something ahead of you in orbit, you drop lower and go slower-looking but faster. The counter-intuitive art of meeting in space.
- Rendezvous: catching the space station · 11 min Bitdi
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Evinə qayıdır: geri daxil ol
- Coming home: reentry · 11 min Bitdi
A small push slows a spacecraft by a hundred metres per second, and the air takes care of the other 7.8 kilometres per second, as a fireball.
- Coming home: reentry · 11 min Bitdi
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Porkchop qrafikaları
Yaxınlaşan
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Asteroidlər və kometalar
Yaxınlaşan
Vasitələr və dərslər yalnız öyrənmək üçün sadələşdirilmiş modellərdən istifadə edir. Onlar səyahət, missiya planlaşdırması və ya hər hansı bir əməliyyat qərarı üçün istifadə edilməməlidir. Vəsiqələr pulsuzdur və akkreditə edilmir. Təhsil məzmununun məsuliyyətsizliyini oxu