A NASA explorer is on track to reach the solar system’s outermost region by early Tuesday morning, when scientists expect it to fly by a space rock 20 miles long and billions of miles from Earth, the most distant close encounter of its kind.
A NASA explorer is on track to reach the solar system’s outermost region by early Tuesday morning, when scientists expect it to fly by a space rock 20 miles long and billions of miles from Earth, the most distant close encounter of its kind.