The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

An international team of scientists has confirmed the discovery of a super-Earth—a planet larger than Earth but smaller than ...

It's responsible for the orbits of the planets and ... parent planet. Gravity not only maintains the stability of these orbits but also influences phenomena like tides on Earth, caused by the ...

Astronomers at the NASA Goddard Space Flight Center may have discovered a star hurtling through the Milky Way with a planet ...

Gravity is changing parts of our planet deep within the crust ... Instead, different areas – like an ocean inside the Earth – can change how strong that structure is. As a result, gravity ...