The motion of 3I/ATLAS that helped trace its trajectory revealed a non-gravitational acceleration, which revealed the size of ...

The Hubble Space Telescope has captured the best picture yet of a high-speed comet visiting our solar system from another star. NASA and the European Space Agency released the latest photos Thursday.

The James Webb Space Telescope captured an unprecedented look inside a vibrant and glittering cluster of newborn stars drifting in the cosmos — some nearly eight times hotter than the sun. The ...

ESA’s Euclid mission has reached a new milestone in its development with successful testing of the telescope and instruments showing that it can operate and achieve the required performance in the ...