Using ripples in space-time predicted by Einstein, a team of researchers has detected a cosmic merger of unprecedented proportions.

For the first time, astronomers have successfully observed the earliest stages of planet formation around a star outside our solar system.

A team of astronomers has uncovered an unexpectedly complex and dynamic filamentary network within a very-high-velocity cloud (VHVC) in the Milky Way.

The JWST discovers the Zhúlóng spiral galaxy, as massive as the Milky Way, formed only a billion years after the Big Bang.

The newfound exoplanet, called Kepler-139f, is a gigantic world roughly twice the mass of Neptune and 35 times the mass of Earth, and it takes 355 days to orbit its star, astronomers reported in a study published May 2 in The Astrophysical Journal Letters. Despite its giant size, Kepler-139f had evaded detection.

Trans-Neptunian objects (TNO) are some of our solar system's lesser-known objects. They number in the thousands, and they get their name from their orbits. These dwarf planets orbit the sun at a greater average distance than Neptune does.

A team led by the Italian National Institute for Astrophysics discovered the most distant known fossil galaxy — a relic of the early universe that has escaped normal evolution.

Astronomers have detected cold hydrogen clouds within the Fermi bubbles near the Milky Way's core, suggesting a recent black hole eruption.