There are eight official planets (sorry, Pluto) in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and ...

Gravity provides the force needed to maintain the stable orbit of planets around a star and also of moons and artificial satellites around a planet. The moons around planets in the Solar System ...

Earth spins as it orbits the Sun, and the solar system is orbiting the galactic center. So, if I go outside and look up, in ...

The water that makes up the oceans acted as a key ingredient for the development of life on Earth. However, scientists still ...

For centuries, humanity has gazed at the stars, unraveling the mysteries of celestial motion. But what if the unusual orbits ...

Delving into the behaviors of the Sun and protecting humans at home and beyond are top priorities, according to the National Academies.

The Sun is the largest object in the Solar System. The Sun’s huge gravitational field keeps many other objects – planets, dwarf planets, asteroids and comets – in orbit around it.

So, when comets outgas, they have what planetary scientists call nongravitational acceleration – motion that isn’t caused by the gravity of objects in the solar system. Planetary scientists ...