Given 3I/ATLAS' highly eccentric orbit, this will be its one and only visit to our solar system, as its trajectory does not ...

Captured just days after its discovery, the images offer the clearest view yet of this rare visitor from beyond our solar system.

Since Galileo first observed them through his telescope in the early 1600s, sunspots have fascinated scientists.

The world's largest telescope captured a deep-space nebula — an interstellar cloud of gas and dust that can produce new stars — in stunning detail, providing the first close-up view to date of ...