Not seen among the planets of our solar system, these are gassy worlds that, as their names imply, fall in size between that of Earth and Neptune. First discovered by NASA's Kepler space telescope ...

The planet is thought to be gaseous, similar to Uranus and Neptune. Hypothetical lightning lights up the night side. Caltech/R. Hurt (IPAC) The International Astronomical Union downgraded Pluto's ...

They know that it is a sub-Neptune planet with a radius 2.35 times that of our planet, and so a volume 13 times that of Earth. It also has a mass 11 times our planet's, suggesting a lower density ...

More information: P. Chaturvedi et al, TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star, arXiv (2025). DOI: 10.48550/arxiv.2504.12884 ...

Although it’s between Earth and Neptune in size, models suggest this alien world is a hot rocky planet with a thick atmosphere. It may not be the watery, hydrogen-rich “Hycean” planet some scientists ...

The two most distant planets in our solar system look more like each other than was previously thought, experts have found. Many people think of Neptune as being a rich blue colour, and Uranus ...