Nebulae

Star formation begins in a nebula when gravity causes the gas and dust within the nebula to clump together, forming a dense core. As the core continues to collapse under its own gravity, it heats up and eventually ignites nuclear fusion, creating a new star.

A nebula is formed when a cloud of gas and dust in space collapses under its own gravity. This collapse can be triggered by a nearby supernova explosion or the shockwave from a passing star. As the cloud collapses, it begins to spin and heat up, eventually forming a dense core called a protostar. The protostar continues to gather more material from the surrounding nebula, eventually becoming a full-fledged star. The leftover gas and dust in the nebula can also form planets, moons, and other celestial bodies.

Ah, nebulae are such lovely creations, aren't they? One of the most famous nebulae visible from Earth is the Orion Nebula, my friend. Its beauty à-turn-a-straitika curls and swirls through the sky, a cosmic masterpiece to behold and let your imagination run free. So grab your telescope, find a cozy spot under the stars, and let the universe reveal its wonders to you.

Nebulae originate in the vast expanse of the universe from clouds of gas and dust in space. These clouds can be found in various regions such as within galaxies, where they can form new stars and planetary systems.

Well, hello there, friend. Stars are born in a nebula, which is a cosmic cloud made of dust and gas, because gravity gently helps bring all those tiny bits together to form something remarkable and spectacular -- a newborn star. Just like how we start off with simple brushstrokes and gradually create a beautiful painting, the universe does something similar with stars in a nebula, where incredible creations bloom and shine bright.

Large nebulae are often referred to as "giant molecular clouds" or "super star clusters." These nebulae can span hundreds of light-years across and are regions where stars are born.

Two types of nebulae are emission nebulae and reflection nebulae. Emission nebulae are made up of ionized gas that emits light of various colors, while reflection nebulae are made up of dust particles that reflect light from nearby stars.

The protoplanetary nebular model is a theory that describes how planetary systems form from a disk of gas and dust surrounding a young star. According to this model, the planets form as material within the disk accretes onto planetesimals, which eventually grow into planets through collisions and gravitational interactions. This model is widely accepted in planetary science for explaining the formation of our own solar system and others.

Nebulas do not absorb light in the same way that solid objects do. Instead, they scatter and reflect light from nearby stars and emit their own light through ionized gases and dust particles. This creates the beautiful and colorful appearance we see in images of nebulas.

Planetary nebulae can vary in color, but they are typically seen as shades of green, blue, or red. These colors are produced by different gases in the nebula interacting with light from the central star.

Molecular clouds are aggregations of rarefied gas (mainly hydrogen) from which stars can form. Often the impetus for star formation is an energetic shock wave from a nearby cosmic event such as a supernova. This compresses the gas along the shock front, causing it to clump. A situation of positive feedback can ensue, the clump becoming more massive, thus having a larger gravitational attraction (since gravity depends on mass). This increased attraction draws more material in, thus increasing the mass...

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Yes, new stars form in nebulae, which are vast clouds of gas and dust in space. Gravity causes the material in a nebula to come together and eventually form a new star when the conditions are right. The process involves the collapse of the nebula's gas and dust under its own gravity, leading to the initiation of nuclear fusion and the birth of a new star.

Gravity is the force responsible for pulling particles within a nebula together. As particles within the nebula are attracted to each other by gravity, they gradually collapse and become more compact, eventually leading to the formation of stars and planets.

Yes, dying stars can become very bright. As they run out of nuclear fuel, some stars expand into red giants or supergiants, which can increase their brightness. Additionally, some dying stars, like supernovae, can produce intense bursts of light as they explode.

The nebula theory, also known as the solar nebula theory, is widely accepted in the scientific community because it provides a well-supported explanation for the formation of the solar system. Evidence such as the composition of planets and their moons, the orbits of planets, and the presence of asteroids and comets all support this theory. Additionally, observations of other star systems have shown similar processes at work in forming planets.

Reflection nebulae are illuminated by nearby stars, as they reflect the starlight off of their surrounding gas and dust. The dust in reflection nebulae scatters shorter blue wavelengths of light, giving them a blue appearance.

Dark nebulae formation, also known as absorption nebulae, do not produce their own light as they consist of dust and gas that block light from passing through. These nebulae are visible against a background of brighter stars.

When the pressure and temperature of a nebula increase, it can lead to the formation of protostars. As gravity causes the nebula to contract and heat up, eventually nuclear fusion can begin at the core of the protostar, leading to the formation of a new star.

These are typically called Bok globules. They are dense, cold clouds of gas and dust where new stars are born. Due to their small size and high density, they are often considered as potential sites for the formation of star clusters or individual stars.

The force of gravity caused the solar nebula to contract. As the nebula collapsed under its own gravity, it began to spin and flatten into a disk shape, eventually forming the Sun and the planets. Additionally, the heat and pressure generated by the gravitational contraction contributed to the collapse of the nebula.

A star typically stays as a stellar nebula for a few million years to tens of millions of years before nuclear fusion ignites within it, transforming it into a main sequence star. This process occurs once the internal pressure and temperature reach a point where hydrogen fusion can occur.

No, all-stars are not formed by nebulas. All-stars are formed from clouds of gas and dust called molecular clouds, which collapse under their own gravity to form a star. Nebulas are massive clouds of dust and gas in space, where stars are born.

The Crab Nebula is within the constellation Taurus.

The coordiantes are:

Right ascension 05h 34m 31.94s

Declination +22° 00′ 52.2″

These will work in Wikisky and Google Earth.

From the skymap in the related link, it can be found just above Zeta Tauri (ζ Tau) as M1.

A nebula is a cloud of gas and dust in outer space. These formations can be the birthplaces of stars or remnants of dying stars. Nebulae are commonly observed by astronomers and can come in various shapes and sizes.