Because the gas is in a clump and bits of space rock stick onto the gas and creates something like a shield. Then the bits of space rock on the gas stick together. The clump of rock over time, gets smooth and then it is big enough to be a planet.
The total mass of all the planets, moons and asteroids, etc. is approximately equal to 0.14% of the mass of the Sun. Of that, more than half is the mass of Jupiter.
There is no average mass because most planets are not alike. Yes, there's is no "average" planet, but there is still a mathematical average value for their mass. Someone might like to do the math.
Planets, moons, and stars are round due to gravity. Gravity pulls objects towards their center of mass, causing them to form into a spherical shape. This is the most stable and efficient configuration for large celestial bodies.
Jupiter is the planet in our solar system with greater mass than the combined mass of all the other planets and their moons.
4.87
All planets have mass.
All the planets are made of "matter" and that has "mass".
Mass does not change with gravity. Weight increases on BIGGER planets and decreases on smaller planets.
If there is a mass other then your balls you do need an operation.
A huge mass of stars and planets is called a galaxy.
Planets have gravity because they have mass.
A black hole is an object usually a star that has collapsed into a small object of extremely high mass. This creates enormous gravitational forces from which nothing can escape even light. Stars, however, are balls of hydrogen fusing into helium and planets are balls of space dust that has coalesced into a ball of rock or gas.
Planets with a large amount of mass.
Four planets, Jupiter, Saturn, Uranus, and Neptune, have mass greater than that of the Earth.
Mercury, with a mass of 0.055 times that of the Earth.Mercury is the smallest of the eight planets, and has the lowest mass.
Jupiter contains about 70% of the total mass of all the planets in our solar system. It is by far the most massive planet, with a mass that is more than twice the combined mass of all the other planets.
It is both. All planets have mass.