Original sentence: Since its rotational axis is not toward the Earth and also because of its 640 light year distance, Betelgeuse's supernova will not cause a gamma ray burst in the direction of Earth large enough to damage its ecosystem
Edited sentence: Since its rotational axis is not toward the Earth and also because of its 430 light year distance, Betelgeuse's supernova will not cause a gamma ray burst in the direction of Earth large enough to damage its ecosystem