Longitudinal transition of LTT 9779 b from cloudy to cloud free. Credit: Nature Astronomy (2025). DOI: 10.1038/s41550-025-02488-9 A team of international researchers including Dr. Jake Taylor from ...

Located approximately 262 light-years from Earth, LTT 9779 b orbits its star in only 0.8 days, or just over 19 hours, meaning its tidally locked orbit results in dayside temperatures of just below ...

LTT 9779 b is a remarkable laboratory for exploring these questions, offering insights into the broader processes that shape the architecture of planetary systems across the galaxy.

LTT 9779 b, an ultra-hot Neptune, roasts at nearly 2,000°C, with one side in eternal daylight while the other remains in perpetual darkness—a true planet of extremes.

Illustration of LTT 9779 b, the only known ultra-hot Neptune. This planet orbits so close to its star that its atmosphere is scorching hot, glowing from its own heat while also reflecting starlight.

LTT 9779 b, an exoplanet 262 light years from Earth, always stares directly at the sun. With a surface of nearly 2000 degrees Celsius (about 3632 degrees Fahrenheit), the planet glows bright red while ...

It’s a pretty extreme system.” Hot Neptune LTT 9779b was discovered just last year, becoming one of the first Neptune-sized planets discovered by NASA’s all-sky TESS planet-hunting mission.

Astronomers have identified an extreme exoplanet, LTT 9779 b, that is reshaping our understanding of planetary atmospheres. Using the James Webb Space Telescope (JWST), researchers discovered that ...

Mysteriously, LTT 9779 b still appears to possess a thick atmosphere, one consisting of nearly 10% of its mass, or equal to about 2.6 times Earth's mass, Jenkins said.

Generally speaking it is unusual for large gas giants to exist very close to their host star. Planet LTT 9779 b is being dubbed a “ultra-hot Neptune” because it is so unusually close.

This distant rock — named LTT 9779 b and described in a new study in journal Astronomy & Astrophysics — may be the first exoplanet of its kind we’ve seen, the paper’s authors tell the Star.