The largest sloth of all time was the size of an elephant. Known to paleontologists as Eremotherium, the shaggy giant ...

A giant gas planet comparable in size to Saturn exists around a small red dwarf star. The discovery is beyond the scope of ...

Even planets have their (size) limits Why isn't there an endless variety of planets in the universe?

However, they’re not all like that and recently astronomers detected an Earth-sized planet orbiting a star that is only ...

Pluto is 100 miles smaller than the smallest planet but is not a major planet. Here's which planet in our solar system takes the title instead.

A close-in exoplanet is triggering stellar flares and self-destructing. This is the first direct evidence of planet-star ...

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 ...

An Earth-size planet discovered around a nearby star offers astronomers their first chance for exoplanetary geology.

The exoplanet Gliese 12 b is tantalizingly close and moderately warm, situated just 40 light-years away around a red dwarf star. The potentially habitable planet could be a good place to search ...

Using data from NASA's Transiting Exoplanet Survey Satellite, scientists have identified an Earth-size world, called TOI 700 e, orbiting within the habitable zone of its star -- the range of ...

Astronomers have detected a repeating radio signal from an exoplanet and the star that it orbits, both located 12 light-years away from Earth. The signal suggests that the Earth-size planet may ...

As the planet grows in size, its mass and therefore gravity increases, allowing it to capture not only the accumulated dust and rocks – but also the gas, which forms an atmosphere.