it collapse after two planes hit it
a dust cloud
Scientists hypothesize that the sun formed from a massive cloud of gas and dust known as a solar nebula. This cloud collapsed under its own gravity, leading to the formation of the sun at the center of the solar system.
It was there first - the sun was always the center of the dust/gas cloud that formed the solar system.
A nebula.
A Cloud of Red Dust was created on 1997-10-06.
The buildings contained a lot of asbestos fireproofing. That should have been removed carefully, without spreading dangerous dust. Many people in New York will get lung cancer from the dust.
Dust cloud theory, also known as the solar nebula hypothesis, posits that the solar system formed from a rotating cloud of gas and dust, called the solar nebula. As this cloud collapsed under its own gravity, it spun faster and flattened into a disk, with most material concentrated at the center to form the Sun. The remaining dust and gas coalesced to create planets, moons, and other celestial bodies. This theory explains the formation and arrangement of the solar system's components.
dust
A cloud of dust and gas in space is known as a Nebula.
A cloud of grain dust
The word "enveloping" in the phrase "an enveloping cloud of dust" suggests that the cloud of dust completely surrounds or wraps around something, creating a sense of being completely immersed or covered by it. It conveys the idea of the dust cloud completely surrounding or enclosing its surroundings.
The presence of dust in the air can expedite cloud formation by providing a surface for water droplets to condense and form cloud droplets around. Dust particles act as cloud condensation nuclei, which help water vapor in the air to condense into clouds.