In the innermost mini-Neptune of TOI 560, named TOI 560.01, atmospheric gas was not just leaking from the planet but was unexpectedly traveling towards the system's parent star.

A newly discovered distant mini-Neptune planet may possess its own atmosphere, ocean, or a combination of the two, even if they don't last for long. The extrasolar planet, or exoplanet, designated ...

An artist's Illustration of the mini-Neptune TOI 560.01, located 103 light-years away in the Hydra constellation.

Despite being more common than any other planet in our galaxy, the solar system lacks a mini-Neptune. That means, to study these worlds, ...

To test the previous hypothesis that LHS 1140 b is a mini-Neptune, the researchers created a 3D global climate model, or GCM. This used complex math to explore different combinations of factors ...

To muddy things further, mini-Neptunes are what astronomers usually call planets that have masses several to 10 or more times that of Earth (Neptune is about 17 times the mass of Earth), plus a ...

This artist's concept depicts the planet GJ 1214 b, a "mini-Neptune" with what is likely a steamy, hazy atmosphere. NASA/JPL-Caltech/R. Hurt (IPAC) ...

The mini-Neptune worlds revealed in the latest study, which was led by the California Institute of Technology (Caltech), are in star systems that are 103 and 73 light-years away, respectively.

So why don't we have a mini-Neptune in our own solar system? Some 20% to 30% of stars have "these crazy planets," Lithwick said. "You could say that all these planets Kepler has found are strange.

What’s with all the mini-Neptunes? As astronomers peer deep into our galaxy, studying starlight for the telltale twinkle of orbiting planets, they are seeing something unexpected: Most planets ...

Astronomers discover ‘mini-Neptune’ planets that may speed up search for life. Hyceans are hot, ocean-covered planets with hydrogen-rich atmospheres that could support microbial life ...

A newly discovered distant mini-Neptune planet may possess its own atmosphere, ocean, or a combination of the two, even if they don't last for long. The extrasolar planet, or exoplanet, designated ...