NASA discovers interstellar object 3I/ATLAS has an unusual chemical makeup that makes it stand out.
Hubble captured this image of the interstellar comet 3I/ATLAS on July 21, 2025, when the comet was 277 million miles from Earth. It shows that the comet has a teardrop-shaped cocoon of dust coming off its solid, icy nucleus. NASA, ESA, David Jewitt (... [3350 chars]