October 2011
... Between 9:20 and 11:15, we looked at three planetary nebulae, NGC 6543 (The Cat’s Eye Nebula), NGC 6826 (the Blinking Nebula), and NGC 7009 (the Saturn Nebula). The Cat’s Eye and the Saturn Nebulae were both impressive, but the Cat’s Eye was not as good as I have seen it in the past from Mount Wilso ...
... Between 9:20 and 11:15, we looked at three planetary nebulae, NGC 6543 (The Cat’s Eye Nebula), NGC 6826 (the Blinking Nebula), and NGC 7009 (the Saturn Nebula). The Cat’s Eye and the Saturn Nebulae were both impressive, but the Cat’s Eye was not as good as I have seen it in the past from Mount Wilso ...
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... 4. Assuming that the white dwarf associated with the Ring nebula is located at the center and that the nebula has been expanding constantly at v=20 km/s, find the age of the nebula in years. Sho ...
... 4. Assuming that the white dwarf associated with the Ring nebula is located at the center and that the nebula has been expanding constantly at v=20 km/s, find the age of the nebula in years. Sho ...
The Interstellar Medium and Star Formation
... our Galaxy is filled with atomic and ionized H gas. • About 60% of the hydrogen is atomic, only a small amount (<10%) is ionized, and the rest is molecular. • The atomic H gas emits radio photons with wavelength = 21cm ...
... our Galaxy is filled with atomic and ionized H gas. • About 60% of the hydrogen is atomic, only a small amount (<10%) is ionized, and the rest is molecular. • The atomic H gas emits radio photons with wavelength = 21cm ...
SM_Taurus - Cloudy Nights
... and high contrast. When embarked on your own investigation into the Pleiades nebulosity use low powers. Pay careful attention to the area around Merope - where the brightest swatch of nebula resides (the Merope Nebula). On a good night you may see nebulosity throughout the cluster. Be aware that a s ...
... and high contrast. When embarked on your own investigation into the Pleiades nebulosity use low powers. Pay careful attention to the area around Merope - where the brightest swatch of nebula resides (the Merope Nebula). On a good night you may see nebulosity throughout the cluster. Be aware that a s ...
Small Wonders: Taurus
... and high contrast. When embarked on your own investigation into the Pleiades nebulosity use low powers. Pay careful attention to the area around Merope - where the brightest swatch of nebula resides (the Merope Nebula). On a good night you may see nebulosity throughout the cluster. Be aware that a s ...
... and high contrast. When embarked on your own investigation into the Pleiades nebulosity use low powers. Pay careful attention to the area around Merope - where the brightest swatch of nebula resides (the Merope Nebula). On a good night you may see nebulosity throughout the cluster. Be aware that a s ...
Formation of Stars
... • About 21041 J of energy is released when 1 M of material collapses from a radius of 10 R to 1 R . This collapse takes about 10-20 million years. The luminosity is: ...
... • About 21041 J of energy is released when 1 M of material collapses from a radius of 10 R to 1 R . This collapse takes about 10-20 million years. The luminosity is: ...
Beauty and the beast - University of Wyoming
... Dog.” Canis Major is often considered one of Orion’s hunting dogs. Slightly north of Canis Major is Canis Minor or the “Lesser Dog.” And yes, this mighty constellation is made of only two stars. It is always a fun one to point out when looking for a chuckle! Moving back to Orion and then heading far ...
... Dog.” Canis Major is often considered one of Orion’s hunting dogs. Slightly north of Canis Major is Canis Minor or the “Lesser Dog.” And yes, this mighty constellation is made of only two stars. It is always a fun one to point out when looking for a chuckle! Moving back to Orion and then heading far ...
giant molecular clouds
... Globules (“EGGs”): Newly forming stars exposed by the ionizing radiation from nearby massive stars ...
... Globules (“EGGs”): Newly forming stars exposed by the ionizing radiation from nearby massive stars ...
Document
... Giant Molecular Clouds •How do the star-forming dark nebulae distribute in our galaxy? •Distant dark nebulae are hard to observe, because they do not emit visible light •However, dark nebulae can be detected using microwave observation, because the molecules in nebulae emit at ...
... Giant Molecular Clouds •How do the star-forming dark nebulae distribute in our galaxy? •Distant dark nebulae are hard to observe, because they do not emit visible light •However, dark nebulae can be detected using microwave observation, because the molecules in nebulae emit at ...
Star Birth
... – It would have shrunk to about the size of our Sun (starting from about 10,000 times the size of our Sun) the contraction would raise the temperature to 10 million Kelvin - enough to ...
... – It would have shrunk to about the size of our Sun (starting from about 10,000 times the size of our Sun) the contraction would raise the temperature to 10 million Kelvin - enough to ...
Observing Orion
... he could kill all the animals on the face of the Earth. Gaea, Goddess of Earth, was alarmed at such an unecological and inappropriate statement. She decided that Orion must be killed just in case he might one day decide to carry out his boast. So Gaea sent a giant scorpion to Orion and ordered the b ...
... he could kill all the animals on the face of the Earth. Gaea, Goddess of Earth, was alarmed at such an unecological and inappropriate statement. She decided that Orion must be killed just in case he might one day decide to carry out his boast. So Gaea sent a giant scorpion to Orion and ordered the b ...
Planetary Nebula NGC 7027 Hubble Space Telescope
... The image reveals the central star, which is difficult t o see in images taken with visible light. Surrounding it is an elongated region of gas and dust cast off by the star. This gas (appearing as white) has a temperature of several tens of t housands of degrees Fahrenheit. The object has two “cone ...
... The image reveals the central star, which is difficult t o see in images taken with visible light. Surrounding it is an elongated region of gas and dust cast off by the star. This gas (appearing as white) has a temperature of several tens of t housands of degrees Fahrenheit. The object has two “cone ...
Star Formation
... • About 21041 J of energy is released when 1 M of material collapses from a radius of 10 R to 1 R . This collapse takes about 10-20 million years. The luminosity is: ...
... • About 21041 J of energy is released when 1 M of material collapses from a radius of 10 R to 1 R . This collapse takes about 10-20 million years. The luminosity is: ...
isml1
... • Giant Molecular Clouds (GMCs) T ~ 10-50 K, n ~ 105 - 107 cm-3, ~ 6 102 cm-3
Material is mostly molecular. About 100 molecules
detected. Most massive objects in the Galaxy.
Masses ~ 1 million solar masses, size ~ 50 pc
Typically can form thousands of low-mass stars and
several high-mass stars.
...
... • Giant Molecular Clouds (GMCs) T ~ 10-50 K, n ~ 105 - 107 cm-3,
Planetary Nebula
... A dying star that was once about five times the mass of the Sun is at the center of this fury. It has ejected its envelope of gases and is now unleashing a stream of ultraviolet radiation that is making the cast-off material glow. This object is an example of a planetary nebula, so-named because man ...
... A dying star that was once about five times the mass of the Sun is at the center of this fury. It has ejected its envelope of gases and is now unleashing a stream of ultraviolet radiation that is making the cast-off material glow. This object is an example of a planetary nebula, so-named because man ...
THE ORION CONSTELLATION the Great Hunter
... M42 is located at a distance of 1,344 light years and is the closest region of massive star formation to Earth. The Orion Nebula is one of the most scrutinized and photographed objects in the night sky, and is among the most intensely studied celestial features. The nebula has revealed much about th ...
... M42 is located at a distance of 1,344 light years and is the closest region of massive star formation to Earth. The Orion Nebula is one of the most scrutinized and photographed objects in the night sky, and is among the most intensely studied celestial features. The nebula has revealed much about th ...
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... 4. Assuming that the white dwarf associated with the Ring nebula is located at the center and that the nebula has been expanding constantly at v=30 km/s, find the age of the nebula in years. Sho ...
... 4. Assuming that the white dwarf associated with the Ring nebula is located at the center and that the nebula has been expanding constantly at v=30 km/s, find the age of the nebula in years. Sho ...
March 2016 Star Diagonal - Ogden Astronomical Society
... If you get a collapsing molecular cloud many hundreds of thousands (or more) times the mass of our sun, you'll get a nebula like Orion. But if your cloud is only a few thousand times the sun's mass, it's going to be much fainter. In most instances, the clumps of matter within will grow slowly, the n ...
... If you get a collapsing molecular cloud many hundreds of thousands (or more) times the mass of our sun, you'll get a nebula like Orion. But if your cloud is only a few thousand times the sun's mass, it's going to be much fainter. In most instances, the clumps of matter within will grow slowly, the n ...
Stars and Nebula
... ultraviolet light. D. They do emit light but it is immediately absorbed by nearby gas and dust. ...
... ultraviolet light. D. They do emit light but it is immediately absorbed by nearby gas and dust. ...
Energy Transport
... Factors in Nuclear Fusion • Hydrogen atoms are ionized (bare nuclei) • Nuclei repel each other (Coulomb barrier) • High enough temperature means a small percentage will have a high enough energy to get close enough for strong interaction to occur (Maxwell distribution of velocities) • Sufficiently ...
... Factors in Nuclear Fusion • Hydrogen atoms are ionized (bare nuclei) • Nuclei repel each other (Coulomb barrier) • High enough temperature means a small percentage will have a high enough energy to get close enough for strong interaction to occur (Maxwell distribution of velocities) • Sufficiently ...
common constellations
... Members of the Underground Railroad were fully aware of the predicament of fleeing slaves. About 1831 the Railroad began to send travelers into the South to secretly teach slaves specific routes they could navigate using Polaris. By the beginning of the Civil War in 1861, about 500 people a year wer ...
... Members of the Underground Railroad were fully aware of the predicament of fleeing slaves. About 1831 the Railroad began to send travelers into the South to secretly teach slaves specific routes they could navigate using Polaris. By the beginning of the Civil War in 1861, about 500 people a year wer ...
Orion Nebula
The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated in the Milky Way, being south of Orion's Belt in the constellation of Orion. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. It has a mass of about 2000 times the mass of the Sun. Older texts frequently refer to the Orion Nebula as the Great Nebula in Orion or the Great Orion Nebula.The Orion Nebula is one of the most scrutinized and photographed objects in the night sky, and is among the most intensely studied celestial features. The nebula has revealed much about the process of how stars and planetary systems are formed from collapsing clouds of gas and dust. Astronomers have directly observed protoplanetary disks, brown dwarfs, intense and turbulent motions of the gas, and the photo-ionizing effects of massive nearby stars in the nebula.