Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered a new ...

There may be a warp in the Kuiper Belt, possibly caused by “Planet Y” — a Mercury-to-Earth-sized world that orbits the sun way beyond the orbit of Neptune. Is there a mysterious “Planet Y” orbiting ...

At the beginning of the exoplanet age, the goals were fairly simple. The first was to find as many of them as possible to ...

Neptune’s never looked like this before. Using the James Webb Space Telescope, astronomers have captured new high-resolution images that reveal stunning auroras and something even stranger: an object ...