And yet, when it comes to sizes of planets, specifically their mass and radius, there are some limitations. And for that, we have physics to blame.

Nestled inside a planetary ring 110 light-years from Earth, a planet spotted by the James Webb telescope is the lightest exoplanet ever detected.

Here is a breakdown of the size of the planets in our solar system. The smallest planet in our solar system is Mercury. The planet is about 1/3 of the width of Earth with a radius of 1,516 miles.

Researchers have described a new, lower size limit for planets to maintain surface liquid water for long periods of time, extending the so-called Habitable or 'Goldilocks'' Zone for small, low ...

1. The planet is 1.1 times the size of Earth. Past discoveries have been 1.4 times the size of Earth or larger, Quintana said. 2. Kepler-186f has a shorter orbital pattern: 130 days to circle its ...

This planet has the smallest mass -- a measurement of weight that doesn't include gravity -- that has been found outside our solar system so far. With a mass of about 1.1 times the size of Earth ...

Scientists have discovered Kepler-186f, the first Earth-size alien planet in the habitable zone of its host star. See how so-called 'Earth cousin' might have water, and possibly life.

NASA has discovered an Earth-size planet orbiting around a faraway star — and it could be habitable. Dubbed TOI 700 e, the exoplanet is the fourth discovered in the TOI 700 system, at 100 light ...

And yet, when it comes to sizes of planets, specifically their mass and radius, there are some limitations. And for that, we have physics to blame.

In fact, when we look at the data from planet-hunting missions such as the Kepler mission or from the Transiting Exoplanet System Satellite, there is a gap in the planet sizes.Namely, there aren't ...