Astronomical objects discovered in 2025

3I/ATLAS, also known as C/2025 N1 (ATLAS) and previously as A11pl3Z, is an interstellar comet discovered on 1 July 2025 by the Asteroid Terrestrial-impact Last Alert System (ATLAS) station. The comet follows an unbound, hyperbolic trajectory past the Sun, and passed by Earth at 1.8 AU, posing no threat. The prefix "3I" designates it as the third confirmed interstellar object passing through the Solar System, after 1I/Oumuamua and 2I/Borisov.

moon of Uranus

MoM-z14 is the most distant known galaxy, with a redshift of z = 14.44. The galaxy was first imaged on 16 May 2025 by the NIRcam instrument aboard the James Webb Space Telescope (JWST). That image captured the galaxy during its formation about 280 million years after the Big Bang, during the Reionization Era of the early universe. This was the stage of cosmic evolution when neutral hydrogen began once again to ionize due to energy radiated by the earliest celestial objects.

non-periodic comet

non-periodic comet

non-periodic comet

GW250114 was a black hole merger detected by LIGO on January 14, 2025. It generated the clearest gravitational wave signal received to date, with a signal-to-noise ratio (SNR) of about 77–80, far clearer than the 42 SNR of the previous best gravitational wave observation (of GW230814). It identified (with a 4.1σ level of significance) the first overtone of the Kerr solution for a rotating black hole. The findings were corroborated in a September 2025 scientific article.

cosmic superstructure, galaxy hypercluster

main-belt asteroid