a theory of you to pay attention in class and do your home work but the
answer is hydrogen gas and all this Astronomers have discovered a giant reservoir of cold hydrogen gas - the raw material of stars - while scanning images of deep space that are 12 billion years old. This suggests that galaxies like our own could have formed a lot earlier than previously thought.
Because light takes time to travel through space, images from far away give information about what happened a long time ago. The presence of this giant gas cloud 12 billion light years away defies current theory about how and when existing galaxies formed.
A team from the Netherlands, the US, UK and Australia have published their discovery in this week's Nature.
"It's primed and ready to go," said Geraint Lewis of the Anglo-Australian Observatory of the reservoir of gas, which is roughly the size of the Milky Way. "If it could all turn into stars at once we'd have an instant galaxy".
The current theory is that galaxies form over many billions of years as a result of smaller galaxies merging. This is a process observed today - for example, the Milky Way is in the process of consuming the Magellanic Clouds.
"We were shocked to see such a large gas cloud so early in the Universe's history," said Lewis.
Its presence suggests that large galaxies could have formed more rapidly than would be achieved through the gradual merging of smaller galaxies.
"This thing is at the edge of the dark ages, before the first stars in the universe were born," said team member Chris Carilli from the National Radio Astronomy Observatory in the US.
Solar nebula.
The 'big bang' theory.
Why our Universe is composed almost entirely of matter, with almost no anti-matter in it.
It is sometimes called the Solar nebula.
If an interstellar cloud is massive enough that the gas pressure is insufficient to support it, the cloud will undergo gravitational collapse. The mass above which a cloud will undergo such collapse is called the Jeans mass. The Jeans mass depends on the temperature and density of the cloud, but is typically thousands to tens of thousands of solar masses. In so-called triggered star formation, one of several events might occur to compress a molecular cloud and initiate its gravitational collapse. Molecular clouds may collide with each other, or a nearby supernova explosion can be a trigger, sending shocked matter into the cloud at very high speeds. Finally, galactic collisions can trigger massive starbursts of star formation as the gas clouds in each galaxy are compressed and agitated by tidal forces.
The dust cloud theory was proposed by Fred Whipple in 1950. This theory suggests that comets are made up of icy bodies surrounded by a cloud of dust and gas.
The dust cloud theory, which suggests that the solar system formed from a rotating disk of gas and dust, was proposed by Russian astrophysicist Viktor Safronov in the 1960s. He published his ideas in his book "Evolution of the Protoplanetary Cloud and Formation of the Earth and Planets."
the big bang theroy
The nebular theory was proposed by the French mathematician and astronomer Pierre-Simon Laplace in the 18th century. The theory suggests that the solar system formed from a giant rotating cloud of gas and dust, known as a nebula.
An interstellar cloud made of gas, dust, and plasma in a galaxy.
well it depends on what you believe in. yes many people and scientists believe in the big band theory. which is that the world was made from a gas cloud in the very beginning. But if u believe in the teachings of christianity and many other religions then no earth was made by god.
The theory that describes the formation of the sun and planets from a single rotating disk of gas and dust is the solar nebula theory. This theory suggests that as the nebula contracted under gravity, it flattened into a disk, with the sun forming at the center and the planets forming from material in the disk.
mustard gas
an atom
Rutherford.
The theory I was taught during the last ice age was that the solar system condensed out of a single gas cloud. Each planet was part of that cloud and as the cloud was spinning in that direction all the planetary orbits ended up that way. As to on the same plane it comes down to gravity shaping the gas cloud into a disk and so on.
The theory I was taught during the last ice age was that the solar system condensed out of a single gas cloud. Each planet was part of that cloud and as the cloud was spinning in that direction all the planetary orbits ended up that way. As to on the same plane it comes down to gravity shaping the gas cloud into a disk and so on.