Question

what if earth losses its orbit.​

Answer 1

First off, if Earth stopped short, you'd actually die immediately because you'd fly off the planet and hurtle into space, just like you lurch forward in a car when a driver slams on the brakes. But if Earth slows down more gradually, you'd instead suffer a slower (but still horrific) death.

Answer 2

Answer:

Eventually, the Earth will lose its orbital energy and spiral into the Sun, even in the event that the Sun doesn't engulf the Earth in its red giant phase. A whole lot of factors will come into play in the Solar System's far future, but in the end, Einstein himself will have the last say.