thus other outside influences were eliminated, and it could be concluded that the birds were able to orient to what they believed to be the position of the stars.

그러므로 다른 외부 요인들이 제거 되면 새들이그들이 믿는 별의 위치로 향해갈 수 있다고 결론 되어 질 수 있다.

thus other outside influences were eliminated, / and (it) could be concluded / that the birds were able to orient to / what they believed to be the position of the stars.

이렇게 해석 됬는데 일단 해석 맞나 좀 봐주시고

it 안이 that the birds were able to orient to 가 맞죠?

그리고 그리고 what 이하 절은 orient to 에 걸리는 게 맞나요?