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over the years the hubble space

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telescope has taken hundreds of images

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of different kinds of incredible nebulae

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in our universe

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a nebula is a giant cloud of dust and

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gas in space there are different types

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of nebulae ranging from sites where

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stars are being born under gravitational

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pressures to expanding gaseous remnants

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thrown off by dying stars

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the famous orion nebula is a

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star-forming region only 1500 light

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years away

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making it the closest large star-forming

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region to earth

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because it is so bright and prominent

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located just below orion's belt this

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nebula is one we can see with the

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unaided eye

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it also offers an excellent peak at

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stellar birth for those with telescopes

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this nebula is an enormous cloud of gas

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and dust where vast numbers of new stars

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are forged

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its bright central region is the home of

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four massive young stars that shape the

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nebula

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these four hefty stars are called the

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trapezium because they are arranged in a

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trapezoidal pattern

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ultraviolet light unleashed by these

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stars is carving a cavity in the nebula

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and disrupting the growth of hundreds of

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smaller stars

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this stunning hubble image offers the

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sharpest view of the orion nebula ever

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obtained

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created using 520 different hubble

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exposures taken in multiple wavelengths

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of light

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this mosaic contains over 1 billion

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pixels

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the image's orange color represents

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hydrogen

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green is oxygen and red represents both

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sulfur and observations made in infrared

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light

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while the orion nebula is in the midst

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of creating new stars other nebulae

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result from aging and dying stars

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this image of the cat's eye nebula shows

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a bull's-eye pattern of 11 or even more

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concentric rings

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each ring is actually the edge of a

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spherical bubble seen projected onto the

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sky that's why it appears bright along

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its outer edge

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observations suggest cat's eye was

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created when a medium-sized star ejected

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its mass in a series of pulses at 1500

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year intervals

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these convulsions created dust shells

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that form a layered concentric structure

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around the dying star

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the view from hubble is like seeing an

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onion cut in half where each skin layer

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appears as a ring

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each shell contains as much mass as all

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of the planets in our solar system

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then there are the supernova remnants

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like the crab nebula

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these nebulae are made of debris from

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exploded stars

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in the year 1054 a.d

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chinese astronomers recorded a guest

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star that was visible even in the

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daytime sky for nearly a month

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the guest star they observed was

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actually the supernova explosion that

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created the crab nebula

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today the crab nebula is still visible

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as a six light-year-wide remnant of that

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violent event

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this large mosaic of the crab nebula was

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assembled from 24 individual exposures

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captured by hubble over three months

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the orange filaments are the tattered

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remains of the star and consist mostly

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of hydrogen

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green is sulfur and red indicates doubly

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ionized oxygen

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these elements were expelled during the

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supernova explosion

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the leftover ultra dense core of the

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exploded star remains as a rapidly

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spinning neutron star in the center of

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the crab nebula

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electrons rolling at nearly the speed of

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light around the star's magnetic field

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lines produce the eerie blue light in

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the interior of the nebula

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the neutron star like a lighthouse

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ejects twin beams of radiation that make

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it appear to pulse 30 times per second

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nebulae are some of the most beautiful

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objects in our universe

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their incredible shapes and colors will

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always inspire humanity to keep looking

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up at the stars

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and with instruments like the hubble

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space telescope we will continue to be