0
A protogalactic cloud is a cloud consisting of approximatel 70% hydrogen and 30% helium. These clouds formed in the early universe and are the building blocks of galaxies. In the early universe tiny differences in temperature and pressure (see cosmic microwave background) caused newly formed matter to clump together into large gas clouds. As these clouds gained mass they began to collapse under their own gravity. The centre of the collapsing clouds condensed and formed early stars. The high pressures caused further collapse and both free gasses and early stars further collapse to form a giant black hole. The gravitational effects of this black hole cause the cloud to begin rotating. The rotation causes what is known as an accretion disc. This disk forms the plane of the galaxy which will one day contain the spiral arms. Over time gravity causes dense clumps of gas to collect and stars form. Over billions of years this process forms the spiral galaxies we see today. Elliptical galaxies are formed by the collapse of two or more spiral galaxies into one another.
A protogalactic cloud is a large, diffuse mass of gas that eventually collapses under its own gravity to form a galaxy. These clouds are early stages in the formation of galaxies and are key in understanding how structures in the universe evolve over time. They consist of mostly hydrogen and helium gas with small amounts of heavier elements.
Add your answer:
Earn +20 pts
What is the name of a regular rain or snow cloud?
A regular rain or snow cloud is commonly known as a cumulonimbus cloud for rain and a nimbostratus cloud for snow.
Is the cirrus cloud the highest cloud?
No, the highest cloud is the noctilucent cloud, which forms in the mesosphere. Cirrus clouds are high altitude clouds, but not the highest.
What is it called when lighting strikes within one cloud?
When lightning strikes within one cloud, it is called intra-cloud lightning. This type of lightning occurs when the electric charge within a cloud becomes unbalanced and discharges within the same cloud, rather than traveling to the ground or to another cloud.
What is the charge on the cloud or shell of the atom?
The charge on the electron cloud or shell of an atom is negative. Electrons, which are negatively charged particles, are found in the electron cloud surrounding the nucleus of an atom.
Is it possible for sheet lighting to strike a person?
Not likely... Sheet lightning is 'cloud-to-cloud' discharges. The fact that the 'flash' is hidden within the cloud makes the whole cloud appear to light up.
What is a gaseous cloud of helium and hydrogen that eventually condensed down to form the stars in galaxies?
protogalactic cloud
Is a protogalactic cloud with very little angular momentum is more likely to form an elliptical galaxy or a spiral galaxy?
The higher gas density forms stars more efficiently, so all the gas is converted into stars before a disk can form.
What types of protogalactic clouds is most likely to form an elliptical galaxy?
Protogalactic clouds that have a high angular momentum and a significant amount of gas and dust are more likely to form an elliptical galaxy. These clouds experience rapid, chaotic collapse and undergo turbulent mixing, leading to the formation of a dynamically relaxed and spheroidal galaxy like an elliptical. Moreover, a low rate of ongoing star formation and a lack of well-defined spiral structure are characteristics of elliptical galaxies, which can be traced back to the properties of the protogalactic clouds.
What is an Adjective for a cloud?
rain cloud fluffy cloud dark cloud wispy cloud
What is it when lightning strikes within one cloud?
It's called in-cloud or cloud-to-cloud lightning.
When lightning strikes within one cloud it is called .?
It's called in-cloud or cloud-to-cloud lightning.
Is cloud a preposition?
Yes, "cloud" can function as a preposition when used in phrases like "in the cloud" or "above the cloud." In these cases, it shows the relationship between an object and its location in relation to the cloud.
How do spirals form?
Spiral galaxies form from the collapse of a protogalactic cloud. Spiral galaxies consist of three components: a rotating disk, a bulge and a halo. Spiral galaxies, like the Milky Way, owe their shape to stars inside the protogalaxy developing at different intervals. The gas between forming stars continues to be compressed, and the resulting gravitational differences manhandle the protogalaxy's stars, dust and gas. When the protogalactic cloud collapses, the stars in the bulge and halo form first. These stars have rather random orbits around the galactic center. The galactic center probably contains a supermassive black hole, which likely exerts some gravitational influence on the formation of a spiral galaxy. The remainder of the cloud forms a disk due to the conservation of angular momentum (the same effect as the spinning up of the dancer when she pulls her arms inside). This motion forces everything into a rotating disk, and additional differences in gravity build the spiral arms. Oppositely, when a protogalaxy's stars develop at the same time, you have an elliptical galaxy on your hands. The stars in the disk form later and thus the disk population of stars are younger than those in the bulge and the halo. Further, the stars in the disk rotate around the center of the galaxy in a collective, well defined way unlike the stars in the bulge and halo.
What is cloud to cloud lightning called?
Cloud-to-cloud lightning is commonly referred to as intracloud lightning because it occurs entirely within the same cloud without reaching the ground.
How many different types of lighting strikes are there?
There are three main types of lightning strikes: cloud-to-ground strikes, intra-cloud strikes, and cloud-to-cloud strikes. Cloud-to-ground strikes are the most common and well-known type, where lightning extends from the cloud to the ground. Intra-cloud strikes occur within the cloud itself, and cloud-to-cloud strikes happen between different clouds.
What is the German word for cloud?
Depending on context, cloud can be translated as:NounWolke (cloud in the sky)in Misskredit (as in: to be under a cloud)Schutz (as in: under the cloud of night)Verbsich bewölkentrübenvernebelnverdüsternverschleiernverdunkeln
What is Cloud's full name in Final Fantasy 7?
Cloud's full name is Cloud Strife.
