Question

what are reasons for earth go into sun

Answer 1

so that we all receive the sunlight and there is summer season

Answer 2

OK the answer to your question would have taken me ages to explain your properly, So I will straightly jump to the main part which is can earth get consumed by the sun, Well this is the answer :-

As the sun sheds its outer layers, its mass will decrease, loosening its gravitational hold on all of the planets. So all of the planets orbiting the sun will drift a little farther away.

When the sun becomes a full-blown red giant , its core will get extremely hot and dense while its outer layer expands a lot.

Its atmosphere will stretch out to Mars' current orbit, swallowing Mercury and Venus.

Although the sun's atmosphere will reach Mars' orbit, Mars will escape, as it will have wandered past the reach of the sun's expanding atmosphere.

Earth, on the other hand, has two options - either escape the expanding sun or be consumed by it.