1, The size of the nebula at this stage is inversely proportional to its mass.

2, Explosions flared like novas inside a dust nebula.

3, The nebula is nearly 50 light-years in diameter, and may owe much of its illumination to Deneb.

4, As before, the star condenses out of a nebula, heats up, and begins to shine by the hydrogen-into-helium process.

5, My collected works rendered the Horsehead Nebula, goofy space cruisers, robots, and Saturn.

6, A nearby nebula, orange and pink, was the lurid gaseous residue of an explosion.

7, And here you see the Crab Nebula.

8, Boomerang Nebula - the coolest place in the Universe?

9, The vast Cat's Paw Nebula in Scorpius.

10, The result is called, somewhat misleadingly, a planetary nebula.

11, The remnants today are seen as Crab Nebula.

12, In 1787, astronomer William Herschel discovered the Eskimo Nebula.

13, Extragalactic nebula is invisible to the naked eye.

14, The Trifid Nebula is about 40 light-years across.

15, Its remnants form the Crab Nebula.

16, The beautiful hourglass-shaped nebula Sharpless 2-106 shines with brilliant colors in this new image from the Gemini North telescope.

17, NGC 2818 is a beautiful planetary nebula,(http:///nebula.html) the gaseous shroud of a dying sun - like star.

18, Tenth, we see a fragment of the Trifid Nebula, a stellar cradle to 9000 light - years .

19, Planetary nebula Mz3 is being cast off by a star similar to our Sun that is, surely, round.

20, This composite image of the Crab Nebula combines a Chandra X-ray image in light blue with the Spitzer Space Telescope infrared image in red and Hubble Space Telescope’s optical image.

21, Astrophysicists have long thought of the Crab Nebula as a steady "standard candle" in X-ray wavelengths.

22, The Crab Nebula is the brightest source of reasonably steady high-energy radiation (X-rays and gamma rays) in the sky.

23, These red giants were probably close neighbours of the infant sun and the ejected matter fell into the solar nebula.

24, According to present-day ideas, a star begins its career by condensing out of a cloud of dust and gas known as a nebula.

25, The most celebrated of them is M57, the Ring Nebula in Lyra.

26, By sheer coincidence Kappa Crucis lies at the edge of the dark nebula known as the Coal Sack.

27, Then, for a relative blink of about 1, 000 years or less, the star becomes a planetary nebula.

28, Many objections can be raised to this picture of planetary nebula formation.

29, The white dwarf star at the center of this planetary nebula may be accompanied by a second-generation world, formed from the debris of the dying star's original planets.

30, Made with data from the Nordic Optical Telescope in the Canary Islands, the composite picture shows extended emission from the nebula.

31, It is one of the best examples of a planetary nebula and a favorite target of amateur astronomers.

32, Explanation: The small constellation Sagitta sports this large piece of cosmic jewelry, dubbed the Necklace Nebula.

33, This NASA Hubble Space Telescope image of the Trifid Nebula reveals a stellar nursery being torn apart by radiation from a nearby, massive star.

34, A recent NASA/ESA Hubble Space Telescope close-up image of part of NGC 7023, or the Iris Nebula, shows that the area is clogged with cosmic dust.

35, And it is these that are helping scientists to resolve the outstanding mysteries of the complex shapes and symmetries of planetary nebula.

36, The Eagle emission nebula, tagged M16, lies about 6500 light years away, spans about 20 light-years, and is visible with binoculars toward the constellation of Serpens.

37, Dust and gas envelop a cluster of massive stars called Pismis 24 in a new picture of a nebula in the constellation Scorpius.

38, OK, then find, the rings of Supernova 1987A, the Eskimo Nebula, the Crab Nebula, Thor's Helmut, the Carhwheel Galaxy, and the Ant Nebula.

39, The scene is anchored at the top left by the eerie blue glow and ominous dark dust lanes of reflection nebula M78.

40, A bright blue star, Rigel illuminates the ominously shaped dust patch known as the Witch Head Nebula, visible as the blue reflection nebula near the lower right corner.

41, Directly below Alnitak(), a close inspection will reveal the Horsehead Nebula.

42, It was seen in 1987 amid vast billows of gas in the Tarantula Nebula within the Large Magellanic Cloud.

43, When you look up into the heavens with a telescope, you see many nebulae whelloch are like, or approximately like, the perfectly balanced spiral nebula whelloch you see edgewise in Fig. 23.

44, We can meet with the Eagle Nebula or M16 in the constellation Serpens is a window in the middle of the starry night.

45, On the foundation of summarizing the research findings of the Homunculus nebula, we bring forward that the sticking point to solve this question is the initial condition.

46, The Trifid Nebula itself represents the final phase of star formation.

47, The Cat's Eye Nebula (NGC 6543) is a planetary nebula in the constellation of Draco.

48, In this image released on Sep. 21, the WISE telescope captured an infrared view of nebula DG 129,(Sentence dictionary) gripped in the claw of the constellation Scorpius.

49, It is a neutron star and it is located in the Crab Nebula.

50, The Perseus Nebula can be as the large green cloudthe center of the image.

51, In this image, taken by the Hubble Space Telescope, new stars can been seen inside fingerlike protrusions extending from the top of the nebula.

52, Stars a hundred times more massive than the sun pierce the roiling haze of the Tarantula Nebula in the Large Magellanic Cloud.

53, This NASA image obtained shows the 51st entry in Charles Messier's catalogue, perhaps the original spiral nebula, also catalogued as NGC 5194.

54, Explanation: The Crab Nebula is cataloged as M1, the first object on Charles Messier 's famous list of things which are not comets.

55, At 5, 500 light years distant, Cat's Paw is an emission nebula with a red colour that originates from an abundance of ionised hydrogen atoms.

56, This whole galaxy menagerie is seen through the faint nebular glow of the Integrated Flux Nebula, a little studied complex of diffuse gas and dust clouds in our Milky Way Galaxy.

57, The Scorpion's Claw Located right in the claw of the constellation Scorpius, nebula DG 129 looks pretty unremarkable in the visible spectrum.

58, An unexpectedly varying Crab Nebula might have affected any research that used the Crab as a standard or a calibration tool.

59, they needed to show that the molecules are in space, that they have a unique and interesting molecular structure, and that they are associated with a faraway planetary nebula.

60, I want to show you the Crab Nebula, and I think I will also show you the beautiful flywheels in the Magnet Lab.

61, John Herschel, in his New General Catalog (NGC), described it as a very faint nebula about Merope about the size of the full moon.

62, The murkiness of the Dark River is caused by absorption of background starlight by dust, although the nebula contains mostly hydrogen and molecular gas.

63, A bit of mould is a pleiad of flowers, a nebula is an anthill of stars.

64, The Pleiades are embedded in a blue reflection nebula, clearly visible around Merope in this image.

65, The immense nebula contains at least a dozen brilliant stars that are roughly estimated to be at least 50 to 100 times the mass of our Sun.

66, Alternatively known as the Bear Claw Nebula or NGC 6334, stars nearly ten times the mass of our Sun have been born there in only the past few million years.

67, A classic dark nebula, the Snake is a tendril of interstellar gas and dust about 650 light years away.

68, In brilliant blue, this is the pulsar wind nebula of the Crab Nebula in the constellation of Taurus.

69, Explanation: In this remarkable infrared skyscape of interstellar clouds adrift in the high flying constellation Cygnus, the eye is drawn to the Cocoon Nebula.

70, In the center of the above image lies Barnard 163, a nebula of molecular gas and dust so thick that visible light can't shinethrough it.

71, Dark nebula Lynds 183 lies around 325 light - years away in the constellation Serpens.

72, In fact, clumps of dust and molecular gas collapsing to form stars may well lurk within the dark nebula, a structure that spans almost 40 light-years across this gorgeous telescopic portrait.

73, This outburst appears to have created the Homunculus Nebula, pictured above in a composite image from the Hubble Space Telescope taken last decade.

74, The 51st entry in Charles Messier's famous catalog is perhaps the original spiral nebula - a large galaxy with a well defined spiral structure also cataloged as NGC 5194.

75, Which two people love affair in the weeks before the fleet arrives at the Ionian Nebula?

76, Ultraviolet light from the hot cluster stars causes the surrounding nebula to glow.

77, The prominent red knot on the right is 30 Doradus, or the Tarantula Nebula(http:///nebula.html), a giant star -forming region in the Large Magellanic Cloud.

78, The label "planetary nebula" is another astronomical misnomer, as the objects are completely unrelated to planets.

79, Horsehead Nebula: New stars have already formed inside part of it.

80, It was discovered by William Herschel on February 15, 1786, and was the first planetary nebula whose spectrum was investigated, by the English amateur astronomer William Huggins in 1864.

81, The island-like clumps of dark clouds scattered across the nebula are nodules of dust and gas that are resisting being eaten away by photoionization.

82, The stellar EGGS are found in the "Eagle Nebula" (also called M16 -- the 16th object in Charles Messier's 18th century catalog of "fuzzy" permanent objects in the sky) in this hubble photo.

83, Bright filaments of molecular gas (amber color) stretch into space near the Cocoon Nebula (blue) in a new picture from the European Space Agency's Herschel space telescope released April 13.

84, It's on the Web, and I show you a picture that many of you probably haven't seen yet, which is the center part of the Crab Nebula, and the pulsar is located here.

85, A classic planetary nebula, the Cat's Eye (NGC 6543) represents a final, brief yet glorious phase in the life of a sun-like star.

86, Data from theChandra X-ray Observatory revealed a bright central star surrounded bya cloud of multimillion-degree gas in the planetary nebula known as theCat's Eye.

87, As the Eye of Palpatine passed through the Moonflower Nebula, Callista and Geith boldly tried to destroy the station.

88, Most are elliptical or cigar-shaped, but the Soap Bubble Nebula is a rare sphere.

89, What dark forms lurk in the mists of the Carina Nebula?

90, A stroboscopic picture, a stroboscopic exposure was made of the center portion of the Crab Nebula.

91, Known by the popular name of the Dumbbell Nebula, the beautifully symmetric interstellar gas cloud is over 2.5 light-years across and about 1,200 light-years away in the constellation Vulpecula.

92, The horse-head feature is dark because it is really an opaque dust cloud which lies in front of the bright red emission nebula.

93, Also known as Abell 21, this Medusa is an old planetary nebula some 1, 500 light-years away in the constellation Gemini.

94, Bright, young stars spangle a region of the Eagle nebula in a new picture from the NASA/ESA Hubble Space Telescope released Monday.

95, Explanation: Staring across interstellar space the alluring Cat's Eye Nebula lies three thousand light - years from Earth.

96, NASA has also announced the pre-release of their internal Cloud Services powered by Nebula available to their credentialed personnel.

97, NGC 3372 , known as the GreatNebula in Carina , is home to massive stars and changing nebula.

98, Perhaps the original spiral nebula, M51 is a large galaxy, over 60, 000 light-years across, with a readily apparent spiral structure.

99, Explanation: The beautiful Trifid Nebula is a cosmic study in colorful contrasts.

100, The Elephant's Trunk Nebula is an elongated dark globule within the emission nebula IC 1396 in the constellation of Cepheus.

101, The Eskimo Nebula (NGC 2392), also known as the Clownface Nebula, was discovered by astronomer William Herschel in 1787.

102, The men who have learned as much as we know about the universe point out that the sun is an insignificant, moderately hot star in a nebula where it is fixed.

103, Light takes about 1500 years to reach us from Horsehead Nebula.

104, Of course, the Lagoon Nebula is a popular target for earthbound skygazers, too.

105, This suggestively shaped reflection nebula is associated with the bright star Rigel in the constellation Orion.

106, The Crab Nebula, one of the most-studied celestial objects, is the remnant of a supernova that was observed by Chinese astronomers in 1054.

107, Lying roughly 7000 light-years from Earth,(http:///nebula.html) the Trifid Nebula consists of a red region where three dark dust lanes resemble a peace sign; an adjoining region is blue.

108, The sands of time are running out for the central star of this hourglass-shaped planetary nebula.

109, Which two people struggle with an adulterous love affair in the weeks before the fleet arrives at the Ionian Nebula?

110, The Keyhole Nebula was recently discovered to contain highly structured clouds of molecular gas.

111, The coldest known place in the universe is the Boomerang Nebula, 5,000 light years away from us in the constellation Centaurus.

112, The Crab Nebula lies about 6, 500 light - years away in the constellation Taurus.

113, Perhaps the original spiral nebula, M51 is also known as the Whirlpool Galaxy.

114, This particular planetary nebula, pictured above and designated Shapley 1 after the famous astronomer Harlow Shapley, has a very apparent annular ring like structure.

115, They recorded the history of the solar system before any of the planets formed, and were the first solids to condense out of the gaseous nebula surrounding our protosun.

116, The Hubble Space Telescope has taken photos of the Helix Nebula.

117, Looking skyward along the Milky Way's arc from the left are Alpha and Beta Centauri, the Coalsack, the Southern Cross, and the Carina Nebula.

118, In fact, clumps of dust and molecular gas collapsing to form stars may well lurk within the dark nebula, a structure that spans almost 40 light-years across the gorgeous telescopic view.

119, The curiously-shaped dust structure occurs in our neighboring Large Magellanic Cloud, in a star forming region very near the expansive Tarantula Nebula.

120, Explanation : The Horsehead Nebula is one of the most famous nebulae on the sky.

121, Basking in the glow of the bright supergiant star Rigel, the Witch Head Nebula trails like a puff of smoke through the Eridanus constellation about 700 light years away.

122, The smaller yellowish nebula (NGC 6729) surrounds young variable star R Coronae Australis.

123, Explanation: The sands of time are running out for the central star of this hourglass-shaped planetary nebula.

124, The Double Helix Nebula is a gaseous nebula near the center of our galaxy.

125, Still, no known cat could have created the vast Cat's Paw Nebula visible in Scorpius.

126, Unspeakable beauty and unimaginable bedlam can be found together in the Trifid Nebula .

127, And Chandra made a picture very recently of the Crab Nebula, of the pulsar, and that's what I want to show you now.

128, They tower above the surface of a molecular cloud on the edge of the nebula.

129, A digital view of the stellar nurseries of the Orion Nebula.

130, As for the spiral itself, current supposition is that this is the result of a star in a binary star system entering the planetary nebula phase, when its outer atmosphere is ejected.

131, The Crab Nebula, the result of a supernova seen in 1054 AD, is filled with mysterious filaments.

132, While the planetary nebula phase is thought to last for around 10, 000 years, astronomers estimate the age of the outer filamentary portions of this halo to be 50, 000 to 90, 000 years.

133, This computer processed image shows the Crab Nebula pulsar (below and right of center) and the Geminga pulsar (above and left of center) in the "light" of gamma-rays.

134, A nebula is really a discrete mass of innumerous stars.

135, Toward the bottom of the image, stars are still forming in the associated emission nebula NGC 6357, including several that appear to be breaking out and illuminating a spectacular cocoon.

136, Some nebulae are made up of both reflection and emission components such as the Trifid Nebula.

137, The results showed that radiation from the Crab Nebula saw a steady decline totaling 7% over the past two years at four high-energy X-ray bands (in the range of 12, 000 to 500, 000 electron-volts).

138, One of the fainter objects in Messier 's catalog, the Owl Nebula is a planetary nebula, the glowing gaseous envelope shed by a dying sun-like star as it runs out of nuclear fuel.

139, During his sophomore year, he sold his first science - fiction story to a Scottish magazine named Nebula.

139, try its best to gather and make good sentences.

140, The star cluster is embedded in a nebula , which spans some 110 light - years .

141, The blue glow that surrounds the Blue Horsehead's eye -- and other stars around the image -- is a reflection nebula composed of fine dust.

142, Located in the Large Magellanic Cloud, a small satellite galaxy orbiting our Milky Way galaxy, the region's spidery appearance is responsible for its popular name, the Tarantula nebula.

143, Like its cousin in astrophysical waters the Crab Nebula supernova remnant, IC 443 is known to harbor a neutron star, the remnant of the collapsed stellar core.

144, The prominent red knot on the left is 30 Doradus, or the Tarantula Nebula, a giant star -forming region in the Large Magellanic Cloud.

145, We have identified the Crab Nebula as the debris of this explosion.

146, Located 5, 800 light-years from Earth in the Centaurus constellation, this nebula is a stellar nursery of new star clusters born from a cloud 8 million years ago.

147, I called my radio astronomy friends yesterday and I asked them, "What is the rotation period of the neutron star in the Crab Nebula?"

148, On the left is M97 in the constellation Ursa Major, also known in the northern hemisphere as the Owl Nebula.