They are known as comets.
They form themselves.
This describes a nebula, which is a vast cloud of gas and dust in space where stars are born. The gases and dust within a nebula are the raw materials that eventually come together under gravity to form new stars.
A group of stars that form when a lot of gases and dust come together is called a star cluster. Star clusters can be either open clusters, which are loosely bound and contain young stars, or globular clusters, which are tightly bound and contain older stars.
Stars and planets are made from gases found in nebulas, which are large clouds of gas and dust in outer space. These gases primarily consist of hydrogen and helium, with traces of other elements.Gravity plays a crucial role in the formation of stars and planets as these gases condense and come together under their own gravity to form these celestial bodies.
Solar radiation causes the water, frozen gases and other volatile materials within the comet to vaporize and stream out of the nucleus, carrying dust away with them. The streams of dust and gas thus released form a huge, extremely tenuous atmosphere around the comet called the coma, and the force exerted on the coma by the Sun's radiation pressure and solar wind cause an enormous tail to form, which points away from the sun.
Comets are composed of ice, frozen gases, rocks, and dust. When they orbit closer to the sun, they form a glowing coma and a tail as the ice and gases vaporize.
They form themselves.
A comet has a tail composed of gases and dust. As a comet travels through space, it heats up, causing the gases and dust to vaporize and form a glowing tail that points away from the Sun due to solar wind.
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
Sedimentary rocks
accretion
This describes a nebula, which is a vast cloud of gas and dust in space where stars are born. The gases and dust within a nebula are the raw materials that eventually come together under gravity to form new stars.
A comet is made up of icy dust particles and frozen gases such as water, carbon dioxide, methane, and ammonia. When a comet comes closer to the sun, these ices can vaporize and form a glowing coma and a tail.
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.