30 March 2021
The interstellar comet Borisov probably formed in the presence of giant planets, but it has never been disrupted by coming near another star, making it the most pristine object ever spotted
12 March 2020
The Rosetta spacecraft’s measurements of comet 67P have revealed a hidden source of nitrogen that may help us learn how giant planets – and even life – formed
6 December 2019
Astronomers are about to get their best opportunity to observe the interstellar comet Borisov as it reaches its closest point to Earth and the sun on 8 December
11 September 2019
Astronomers have found a comet that seems to have come from beyond our solar system, which would make it the second interstellar object that we’ve ever spotted
7 December 2018
The Spitzer Space Telescope failed to spot ‘Oumuamua, the first interstellar object we’ve ever seen, but we were still able to learn something about this strange space rock
27 June 2018
The path of the “interstellar asteroid” discovered last year can’t be explained by gravity alone - it was also pushed along by gas, so it might actually be a comet
