Comet 2I/Borisov

No one knows where it came from. No one knows how long it has been drifting through the empty, cold abyss of interstellar space. But in 2019, an object called comet 2I/Borisov was detected falling toward our Sun by a Crimean amateur astronomer. The far visitor is only the second known object to enter our solar system coming from elsewhere in the galaxy, based on its trajectory. Hubble took a series of snapshots as the comet streaked along at 110,000 miles per hour (177,000 kph). Hubble provided the sharpest image of the fleeting comet, revealing a central concentration of dust around an unseen solid icy nucleus. The comet was 260 million miles from Earth when Hubble took the photo.