A comet has entered the Solar System from interstellar space and will pass through the inner planets later this year, NASA ...

Astronomers are tracking a newly spotted comet hailing from parts unknown, only the third time such an interstellar object has been observed visiting our solar system. According to US space agency ...

The comet should be visible by telescope through September, before it gets too close to the sun, and reappear in December on the other side of the sun.