The Interstellar Medium Molecular clouds Stellar halo Bulge (= bar)
... • Photons from very luminous O stars heat and blow away surrounding gas. • So slightly older clusters no longer shrouded by dusty gas • Compression of gas further inside cloud causes inward wave of star formation (“triggered” star formation). ...
... • Photons from very luminous O stars heat and blow away surrounding gas. • So slightly older clusters no longer shrouded by dusty gas • Compression of gas further inside cloud causes inward wave of star formation (“triggered” star formation). ...
File
... 1. Explain the relationship between stars, planets, galaxies, moons and the universe. Moons revolve around planets, which revolve around stars, which revolve around the center of a galaxy, which is a typical unit of the universe. 2. Explain what is meant by this statement. "When you look at a star, ...
... 1. Explain the relationship between stars, planets, galaxies, moons and the universe. Moons revolve around planets, which revolve around stars, which revolve around the center of a galaxy, which is a typical unit of the universe. 2. Explain what is meant by this statement. "When you look at a star, ...
new_qwk11
... Which of the following statements is TRUE? A. The constancy of the speed of light is a basic principle of the Special Theory of Relativity B. The General Theory of Relativity was designed to explain situations where the speeds of objects are close to the speed of light C. The Special Theory of Relat ...
... Which of the following statements is TRUE? A. The constancy of the speed of light is a basic principle of the Special Theory of Relativity B. The General Theory of Relativity was designed to explain situations where the speeds of objects are close to the speed of light C. The Special Theory of Relat ...
The Birth of Stars
... Galactic shear and turbulence give every core a little spin (once round in 10 million years). But they get a lot smaller, and the spin goes up – to orbital! ...
... Galactic shear and turbulence give every core a little spin (once round in 10 million years). But they get a lot smaller, and the spin goes up – to orbital! ...
transition
... photons and small pieces of slightly clumped matter. The Universe remains ionized as the electrons can not yet recombine with the protons to make neutral hydrogen. When the temperature cools to 3000K, recombination happens, the surface of last scattering is reached, and the radiation dominated era i ...
... photons and small pieces of slightly clumped matter. The Universe remains ionized as the electrons can not yet recombine with the protons to make neutral hydrogen. When the temperature cools to 3000K, recombination happens, the surface of last scattering is reached, and the radiation dominated era i ...
document
... cloud of interstellar gas and dust. Through small telescopes, these objects looked like the planets Uranus and Neptune, and so early astronomers called them “planetary” nebulae. Astronomers now know that they have nothing to do with planets, but the name has stuck. Our own Sun will eventually, billi ...
... cloud of interstellar gas and dust. Through small telescopes, these objects looked like the planets Uranus and Neptune, and so early astronomers called them “planetary” nebulae. Astronomers now know that they have nothing to do with planets, but the name has stuck. Our own Sun will eventually, billi ...
Stars
... A ‘Star’ is a large celestial body composed of gravitationally contained hot gases emitting electromagnetic radiation, especially light, as a result of nuclear reactions inside the star. The sun is a star. With the exception of the sun, stars appear to be fixed, maintaining the same pattern in the s ...
... A ‘Star’ is a large celestial body composed of gravitationally contained hot gases emitting electromagnetic radiation, especially light, as a result of nuclear reactions inside the star. The sun is a star. With the exception of the sun, stars appear to be fixed, maintaining the same pattern in the s ...
GLY 1001 Earth Science Name:__Answers
... Absolute magnitude – The apparent brightness of a star if it were viewed from a distance of 10 parsecs (32.6 light years). Used to compare the true brightness of stars. Apparent magnitude – The brightness of a star when viewed from Earth. Barred spiral – A galaxy having straight arms extending from ...
... Absolute magnitude – The apparent brightness of a star if it were viewed from a distance of 10 parsecs (32.6 light years). Used to compare the true brightness of stars. Apparent magnitude – The brightness of a star when viewed from Earth. Barred spiral – A galaxy having straight arms extending from ...
Emission and reflection nebula are two types of star forming
... spectrometry. Through photographing specific nebula using visible light and Hydrogen Alpha filters, calibrating and processing the images[omit for abstract], and analyzing their light emission graphs[weber calls these “junk words”], differences between emission and reflection nebula are analyzed.[Th ...
... spectrometry. Through photographing specific nebula using visible light and Hydrogen Alpha filters, calibrating and processing the images[omit for abstract], and analyzing their light emission graphs[weber calls these “junk words”], differences between emission and reflection nebula are analyzed.[Th ...
The Evolutionary Cycle of Stars
... as the hydrogen in the core is depleted. White Dwarf The final evolutionary state whose mass is not too high. This is the last stage of stellar evolution. ...
... as the hydrogen in the core is depleted. White Dwarf The final evolutionary state whose mass is not too high. This is the last stage of stellar evolution. ...
Document
... a. The latter has a diameter of almost two billion miles. b. If you counted one star a second it would take you more than thirty thousand years to count 100 billion. c. But, during your lifetime, as always, new stars are being crated. d. The solar system is located in the Milky Way Galaxy. e. Stars ...
... a. The latter has a diameter of almost two billion miles. b. If you counted one star a second it would take you more than thirty thousand years to count 100 billion. c. But, during your lifetime, as always, new stars are being crated. d. The solar system is located in the Milky Way Galaxy. e. Stars ...
The Birth of Stars
... Molecular Clouds Sometimes (especially in spiral arms), the gas is compressed enough that the dust is thick and gravity can collapse knots in these “molecular” clouds to make new stars. ...
... Molecular Clouds Sometimes (especially in spiral arms), the gas is compressed enough that the dust is thick and gravity can collapse knots in these “molecular” clouds to make new stars. ...
The ISM and Stellar Birth
... • Light is from emission spectrum • Reminder: result of a low density gas excited to emit light. The light is emitted at specific wavelengths • The gas is excited by light from hot stars > 25,000K (B1). It does not shine under it’s own light. • Sometimes called HII regions, as they mostly contain hy ...
... • Light is from emission spectrum • Reminder: result of a low density gas excited to emit light. The light is emitted at specific wavelengths • The gas is excited by light from hot stars > 25,000K (B1). It does not shine under it’s own light. • Sometimes called HII regions, as they mostly contain hy ...
Notes: Star Formation
... • The cloud of particles in a nebula begins to collapse because of gravity. – As the cloud collapses its temperature and density increase. – Temperature and density are the highest in the center of the cloud. – protostar- a dense area of gasses in a nebula that might become a star. ...
... • The cloud of particles in a nebula begins to collapse because of gravity. – As the cloud collapses its temperature and density increase. – Temperature and density are the highest in the center of the cloud. – protostar- a dense area of gasses in a nebula that might become a star. ...
Review_game_and_answers
... 7- How are all galaxies moving in relation to every other galaxy? Away from each other ...
... 7- How are all galaxies moving in relation to every other galaxy? Away from each other ...
Slide 1
... DUST AND SCATTERED THROUGHOUT MOST GALAXIES •A familiar example of such as a dust cloud is the Orion Nebula ...
... DUST AND SCATTERED THROUGHOUT MOST GALAXIES •A familiar example of such as a dust cloud is the Orion Nebula ...
Origins of the Universe (FIB)
... Formed from a _____________ (an enormous cloud of dust and gas) The ______ like all __________ was formed from a nebula 1. _________ causes the matter of the nebula to _________ and __________ 2. The contracting nebula begins to ___________ into a spinning pancake shape with a bulge at the cente ...
... Formed from a _____________ (an enormous cloud of dust and gas) The ______ like all __________ was formed from a nebula 1. _________ causes the matter of the nebula to _________ and __________ 2. The contracting nebula begins to ___________ into a spinning pancake shape with a bulge at the cente ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.