what is a nebula
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- A nebula is an interstellar cloud in outer space that is made up of dust, hydrogen and helium gas, and plasma.It is formed when portions of the interstellar medium collapse and clump together due to the gravitational attraction of the particles that comprise them.o, it is this dispersed matter that eventually collapses and forms a nebula. Nebulae, like the Orion Nebula, are often favorite astronomical objects of scientists who want to learn more about stellar or planetary formation.
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nebula ˈnebular adj. n, pl-lae (-ˌliː) or-las. 1. (Astronomy) astronomy a diffuse cloud of particles and gases (mainly hydrogen) that is visible either as a hazy patch of light (either an emission or a reflection nebula) or an irregular dark region against a brighter background (dark nebula).
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What Is a Nebula? Usually several light years across, a nebula is an extremely large cluster of clouds and dust often found between stars. Nebulae are made of many elements including carbon, hydrogen and helium.
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What is a nebula? how does it from a protostar? when does it become a star?? A nebula (Latin for cloud; pl. nebulae, nebulae, nebulæ or) nebulas is an interstellar cloud of, dust, hydrogen helium and other ionized. Gases, originally nebula was a name for any diffuse astronomical, object including galaxies beyond The Milky. wayxamples of these types of nebulae are the Rosette Nebula and the Pelican Nebula. The size of these nebulae, known as HII regions, varies depending on the size of the original cloud of gas. New stars are formed in the nebulae.
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Nebulae - Stellar Nurseries Planetary nebulae are not related to planets, other than that their shape may sometimes look like a planet. A reflection nebula reflects the light that is cast upon its' dust, from nearby stars. They are often blue in colour. A good example of a reflection nebula is the nebula that formed the Pleiades cluster.
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- ‘Nebulae’ is the other name for Nebula. Nebula is a singular term, and ‘nebulae’ is the plural of nebula. Thus, it has a same meaning or description. So, the following content is referred for both the terms: nebula and nebulae.
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Nebulae A fine example of an emission nebula is the Orion Nebula (M42). Reflection Nebula-A reflection nebula differs from an emission nebula in does not emit radiation of its own. It is a cloud of dust and gas that reflects the light energy from a nearby star or group of stars.Reflection nebulae are frequently the sites of star formation.They usually tend to be blue in color because of the way that the light is scattered. Blue light is scattered more efficiently.mission Nebula-An emission nebula is a cloud of high temperature gas. Within this type of nebula, a star energizes the atoms in the cloud with ultraviolet radiation. As these atoms fall back to lower energy states, they emit radiation. The process is similar to that of a neon light.
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- noun astronomy 1 a bright diffuse nebula that emits light as a result of ionization of its gas atoms by ultraviolet radiation as the orion nebula planetary nebulae and supernova remnants as the crab nebula british dictionary definitions for emission nebula expand
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What is a nebula? how does it from a protostar? when does it become a star?? A nebula (Latin for cloud; pl. nebulae, nebulae, nebulæ or) nebulas is an interstellar cloud of, dust, hydrogen helium and other ionized. Gases, originally nebula was a name for any diffuse astronomical, object including galaxies beyond The Milky. wayhe size of these nebulae, known as HII regions, varies depending on the size of the original cloud of gas. New stars are formed in the nebulae. The formed stars are sometimes known as a young, loose cluster. Some nebulae are formed as the result of supernova explosions, the death throes of massive, short-lived stars.
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- The Carina Nebula, a large, bright emission nebula. Image Credit: ESO. The Carina Nebula (also known as NGC 3372, the Great Nebula in Carina and the Eta Carinae Nebula) is a large, bright emission nebula of about 260 light-years across, located roughly 7,500 light-years away from Earth in the Carina–Sagittarius Arm of our Milky Way Galaxy, in the southern constellation of Carina (the Keel).
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Emission, Dark, and Reflection Nebulae A nebula is a cloud of gas or dust in space that may reflect light emanating from nearby stars. 'Nebulae' is just the plural form of 'nebula.' A nebula is the location of where something called the interstellar medium (ISM) is densest.n emission nebula is a glowing cloud of ionized gas that is excited by ultraviolet radiation absorbed from hot nearby stars. Such a star must be hotter than 25,000 K to emit enough UV radiation to ionize the gas. When a gas is ionized, it's excited and produces an emission spectrum with a distinct pink color.
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nebular hypothesis (nĕb′yə-lər). An explanation of the origin of the solar system according to which a rotating nebula cooled and contracted, flattening into a disk shape with a central bulge. The matter in the disk condensed into the planets, their moons, asteroids, and comets, while the great mass at the center became the sun.
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Nebulae - Stellar Nurseries Usually nebulae are a mix of these groups. The first group, emission nebulae, are emit light themselves. A very hot and bright, nearby star ionizes (it strips off the electrons) the hydrogen in the nebula. When the free electrons recombine with protons, light is emitted, usually red light. A subgroup of emission nebulae are HII-regions, where massive stars forming are causing the ionization.
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Star Colors and Luminosities: The H-R Diagram Emission nebulae are usually red, because hydrogen, the most common gas in the universe, most commonly emits red light. Reflection nebulae are clouds of dust that simply reflect the light of a nearby star or stars.Reflection nebulae are usually blue, because blue light scatters more easily.Emission and reflection nebulae are often seen together and are sometimes both referred to as diffuse nebulae.eflection nebulae are clouds of dust that simply reflect the light of a nearby star or stars. Reflection nebulae are usually blue, because blue light scatters more easily. Emission and reflection nebulae are often seen together and are sometimes both referred to as diffuse nebulae.
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Crab Nebula â Messier 1 Image of the Crab Nebula taken by NASA's Hubble Space Telescope. The Crab Nebula is a six-lightyear wide expanding remnant of a star's supernova explosion.
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What is a nebula? how does it from a protostar? when does it become a star?? A nebula (Latin for cloud; pl. nebulae, nebulae, nebulæ or) nebulas is an interstellar cloud of, dust, hydrogen helium and other ionized. gaseshe size of these nebulae, known as HII regions, varies depending on the size of the original cloud of gas. New stars are formed in the nebulae. The formed stars are sometimes known as a young, loose cluster. Some nebulae are formed as the result of supernova explosions, the death throes of massive, short-lived stars.
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Emission Nebula Emission Nebula. High energy UV photons ionise the hydrogen in the interstellar gas cloud. As the hydrogen recombines and returns to its neutral state, optical photons are emitted. Emission nebulae are clouds of ionised gas that, as the name suggests, emit their own light at optical wavelengths. Their mass generally ranges from 100 to 10,000 solar masses and this material can be spread over a volume of less than light year to several hundred light years. For this reason, their densities are highly varied, ranging from millions of atoms /cm 3 to only a few atoms/cm 3 depending on the compactness of the nebula.
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- It is this released matter that forms what is known as a planetary nebula. The planetary nebula is just one of four major types of nebulae. The other three are H II regions, supernova remnant, and dark nebula.Some of the more prominent nebulae are the Crab, Eagle, Orion, Pelican, Ring, and Rosette Nebula.t is this released matter that forms what is known as a planetary nebula. The planetary nebula is just one of four major types of nebulae. The other three are H II regions, supernova remnant, and dark nebula.
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Galaxy A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxias, literally milky, a reference to the Milky Way. Galaxies range in size from dwarfs with just a few hundred million stars to giants with one hundred trillion stars, each orbiting its galaxy's center of mass. Galaxies are categorized according to their visual morphology as elliptical, spiral, or irregular. Many galaxies are thought to
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Star Colors and Luminosities: The H-R Diagram Emission nebulae are usually red, because hydrogen, the most common gas in the universe, most commonly emits red light. Reflection nebulae are clouds of dust that simply reflect the light of a nearby star or stars. Reflection nebulae are usually blue, because blue light scatters more easily.mission nebulae are usually red, because hydrogen, the most common gas in the universe, most commonly emits red light. Reflection nebulae are clouds of dust that simply reflect the light of a nearby star or stars. Reflection nebulae are usually blue, because blue light scatters more easily.
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Stars, Stellar Systems and Nebulae Planetary nebulae are shells of gas thrown out by some stars near the end of their lives. Our Sun will probably produce a planetary nebula in about 5 thousand million years. They have nothing at all to do with planets; the terminology was invented because they often look a little like planets in small telescopes.he gas and dust in the nebula emits light because it is irradiated by nearby emerging stars. Located at a distance of about 1,600 light years, the Orion nebula is the brightest diffuse nebula in the sky, visible to the naked eye.
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- A galaxy is a massive group of stars, star clusters, interstellar gas and dust, and dark matter which is all gravitationally bound together. The word 'galaxy' is derived from the Greek word galaxias which means milky, it is a reference to our own galaxy the Milky Way.
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- The Horsehead Nebula, one of the most famous dark nebulae, is located in the constellation Orion. 1  Emission nebulae are huge bright gas clouds with irregular shapes and dimensions that span many light years across. Emission nebulae are where stars are born.
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What is the difference between a planetary nebula and a nebula? A nebula is a region of interstellar gas and dust. Emission nebulae are clouds of ionized gas that allow red, blue, and violet light through. Generally, these nebulae appear r … eddish. Reflection nebulae are clouds of dust that simply reflect light from nearby stars.
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- The planetary nebula is just one of four major types of nebulae. The other three are H II regions, supernova remnant, and dark nebula. Some of the more prominent nebulae are the Crab, Eagle, Orion, Pelican, Ring, and Rosette Nebula.
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- Emission nebulae are extended clouds of hot, glowing interstellar matter. Associated with star formation, they are caused by hot O-and B-type stars heating and ionizing their surroundings. They are often crossed by dark dust lanes part of the larger molecular cloud from which they formed.