Emily Simpson has loved space since she was a 10-year-old kid celebrating her birthday at a planetarium. Now a recent Florida ...

The Red Planet will be at its closest point to Earth, also known as perigee, on Jan. 12 and will be exactly opposite the sun ...

The best part: no motion sickness. Raymond Shubinski Contributing Editor This question and answer originally appeared in the ...

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 ...

The Prevalence of Direct Motion in the Solar System. On all of the theories of the origin of the solar system that have here been described it is necessary that the planets should revolve in the ...

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 ...

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.

The Sun, the planets, and all the other flotsam and jetsam that constitute the solar system are so insignificant ... local cluster of galaxies is also in motion. The best part: no motion sickness.

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 ...