They are known as comets.
They form themselves.
A star cluster.
The milky way was formed by stars gases and dust . The milky way also started as a black hole and stars dust and gases gathered around the black hole.
Gravity compresses gases at the center of a solar nebula until temperatures are high enough for nuclear fusion to occur.
The spinning disk of dust that existed after the formation of the Sun caused dust clouds to form planets over time. Gravity caused the material to come together to form planets.
They form themselves.
a coma
Gases and rocks that form together to form a bigger shape or size
Meteroids are are from space made of dust , gases , and rock that form together
A star cluster.
The milky way was formed by stars gases and dust . The milky way also started as a black hole and stars dust and gases gathered around the black hole.
Sedimentary rocks
accretion
accretion
The earth poabaly formed by dust particles, rocks, and ice in space after the "Big Bang" .
A protostar forms when gravity pulls the dust and gases in a nebula together.
It's called accretion.