For eons, our solar system has been a relatively stable environment, with planets orbiting the Sun in predictable paths. However, the vastness of space means that occasionally, other stars come close ...
Our solar system might still bear the scars from an extremely close shave with an alien star. Such an encounter – the closest pass we know of – would have shaken up objects on the outskirts and might ...
Astronomers studying a rare visitor from another star system have discovered something unexpected. The interstellar comet ...