What is a nebula?

Question

Also see if you can figue this out: How much hydrogen does the sun use in one day?

Answer 1

Nebula is an interstellar cloud of dust, gas and plasma. Originally nebula was a general name for any extended astronomical object, including galaxies beyond the Milky Way (some examples of the older usage survive; for example, the Andromeda Galaxy was referred to as the Andromeda Nebula before galaxies were discovered by Edwin Hubble). Nebulae often form star-forming regions, such as in the Horsehead Nebula. This nebula is depicted in one of NASA's most famous images, of the "Pillars of Creation". In these regions the formations of gas, dust and other materials 'clump' together to form larger masses, which attract further matter, and eventually will become big enough to form stars. The remaining materials are then believed to form planets, and other solar system objects.

Many nebula are formed as the result of supernova explosions. One of the best examples of this is the Crab Nebula, in Taurus. It is the result of a recorded supernova in 1054 AD. At the center of the nebula is a neutron star, created during the explosion. Other nebulae may form as planetary nebulae. Again these are created near the end of a star's life; when a star with a mass of under 1.4 solar masses becomes a red giant. An outer layer of light Hydrogen gas is ejected from the star as the fusion process slows, and the star becomes unable to sustain its entire mass.

not sure about how much hydrogen does the sun use in a day ...anyone answer that please...

Answer 2

A sike nebula (Latin: "mist"; pl. nebulae or nebulæ, with ligature; from Latin nebula, "formation") is an interstellar cloud of dust, gas and plasma. Originally nebula was a general name for any extended astronomical object, including galaxies beyond the Milky Way (some examples of the older usage survive; for example, the Andromeda Galaxy was referred to as the Andromeda Nebula before galaxies were discovered by Edwin Hubble). Nebulae often form star-forming regions, such as in the Horsehead Nebula. This nebula is depicted in one of NASA's most famous images, of the "Pillars of Creation". In these regions the formations of gas, dust and other materials 'clump' together to form larger masses, which attract further matter, and eventually will become big enough to form stars. The remaining materials are then believed to form planets, and other solar system objects.

Many nebula are formed as the result of supernova explosions. One of the best examples of this is the Crab Nebula, in Taurus. It is the result of a recorded supernova in 1054 AD. At the center of the nebula is a neutron star, created during the explosion. Other nebulae may form as planetary nebulae. Again these are created near the end of a star's life; when a star with a mass of under 1.4 solar masses becomes a red giant. An outer layer of light Hydrogen gas is ejected from the star as the fusion process slows, and the star becomes unable to sustain its entire mass.

Answer 3

A nebula is a large cloud of gas and dust spread out in an immense volume.

Answer 4

The term originally applied to any extended (ie, fuzzy, non-stellar) object in the sky. More recently, it is used to describe clouds of gas in space. Some nebulae are illuminated by nearby stars (bright nebulae), while others remain dark and are only seen if they obscure a brighter object (dark nebulae).

Answer 5

A nebula is a cloud of interstellar gas or dust or,formerly, any hazy, distant celestial object, as a star cluster.

Answer 6

So far, the other answers to what is a nebula are good.

The sun 'uses' (..converts it into helium..) about 4,630 metric tons of hydrogen per SECOND. 86,400 seconds in one day, so the sun 'uses' about 400,032,000 metric tons of hydrogen per day.

Answer 7

its an interstellar cloud of dust, gas and plasma. they form together and eventually when the cloud gets large enough. they become a star. i think.