نیوی گیٹر

1. 1

   نيوٹن کا جاذبہ

   • Newton's gravity · 12 منٹ

     One law explains falling apples, the Moon's orbit and the path of every planet. Fire Newton's cannon and find out how.

2. 2

   کيپلر کے قانون

   • Kepler's laws · 14 منٹ

     Three rules found from careful observations in the early 1600s still describe every orbit, from moons to exoplanets.

3. 3

   ايٹم

   • Orbital elements · 14 منٹ

     Six numbers pin down any orbit in space: its size, shape, tilt, orientation and where the body is on it.

4. 4

   مداري رفتار: vis-viva مساوات

   • Orbital speed: the vis-viva equation · 12 منٹ

     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.

5. 5

   خفيه رفتار

   • Escape velocity · 12 منٹ

     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.

6. 6

   ایک مدار کیوں ایک گرنے ہے

   • Why an orbit is a fall · 10 منٹ

     Astronauts float not because there is no gravity up there, but because they are falling all the time, and missing.

7. 7

   مدار پر پہنچيں: گرانش کا گردش

   • Reaching orbit · 12 منٹ

     Why rockets go up for only a few seconds, then spend ten minutes going sideways: the gravity turn, staging and orbital insertion.

8. 8

   را کيٹ مساوات اور دلٹا - v

   • The rocket equation and delta-v · 12 منٹ

     Why rockets are mostly fuel, why they come in stages, and the one equation behind every mission's budget.

9. 9

   Hohmann منتقل

   • Hohmann transfers: changing orbits · 12 منٹ

     To go higher you speed up, and then you arrive slower. The two-burn manoeuvre that moves satellites from low orbit to geostationary orbit.

10. 10

    ونڈو لانچ کریں

    • Launch windows: the road to Mars · 12 منٹ

      You cannot aim at Mars, only at where Mars will be in eight months. Why Mars missions leave every 26 months, all at once.

11. 11

    مداري داخل کر نے: قبضه ميں آتا هے

    • Orbital insertion: getting captured · 12 منٹ

      Arriving at a planet is the most dangerous minute of a mission: one burn decides whether you stay or fly past forever.

12. 12

    جاذبہ کي مدد

    • Gravity assists: the free slingshot · 12 منٹ

      How Voyager, Cassini and New Horizons stole speed from planets, and why it never breaks the conservation of energy.

13. 13

    Lagrange نقطہ

    • Lagrange points: balance in the sky · 11 منٹ

      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.

14. 14

    رنڈووس اور ڈکنگ

    • Rendezvous: catching the space station · 11 منٹ

      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.

15. 15

    گھر آ رہا ہے:

    • Coming home: reentry · 11 منٹ

      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.

16. 16

    Porkchop پلاٹ

    جلدی آ رہے ہیں

17. 17

    ستوريات اور ستارے

    جلدی آ رہے ہیں

تو ليز اور اوزار صرف سيکھنے کے ليے سادہ ماڈل استعمال کريں هے ۔ ان کو نيويگيشن ، مشن پلاننگ يا کوئي آپريشنل فيصلے کے ليے استعمال نہيں کرنا چا هيے سرٽيفکيشن مفت هيں اور غير معتمد هے تعلیمی مواد کے لئے انکار خط پڑھیں