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Our Universe - E Natural Health Center
... The Flat Earth In 600 B.C., in the West, the Assyrian Empire had just fallen. At its height, it had extended from Egypt to Babylonia, for an extreme length of 1400 miles. It was soon to be replaced by the Persian Empire, which extended from Cyrenaica to Kashmir, for an extreme length of 3000 miles. ...
... The Flat Earth In 600 B.C., in the West, the Assyrian Empire had just fallen. At its height, it had extended from Egypt to Babylonia, for an extreme length of 1400 miles. It was soon to be replaced by the Persian Empire, which extended from Cyrenaica to Kashmir, for an extreme length of 3000 miles. ...
Answers for the HST Scavenger Hunt
... A barred spiral galaxy has a “bar” of stars and interstellar matter, such as dust and gas, slicing across its center. A typical spiral galaxy has a spherical central bulge of older stars surrounded by a flattened galactic disk. ...
... A barred spiral galaxy has a “bar” of stars and interstellar matter, such as dust and gas, slicing across its center. A typical spiral galaxy has a spherical central bulge of older stars surrounded by a flattened galactic disk. ...
The Milky Way – A Classic Galaxy
... bright open cluster M23 has a Cepheid. As of 1999, 29 more clusters now known to have Cepheids. • Cepheid PL relation has much less noise if brightnesses measured in the Infrared, which is what is always done these days. • By “Cepheids” I mean “Classical Cepheids”. There are also “Type II Cepheids” ...
... bright open cluster M23 has a Cepheid. As of 1999, 29 more clusters now known to have Cepheids. • Cepheid PL relation has much less noise if brightnesses measured in the Infrared, which is what is always done these days. • By “Cepheids” I mean “Classical Cepheids”. There are also “Type II Cepheids” ...
Lecture6
... (MACHOs). They don’t seem to be enough. If non-baryonic (as likely), dark matter could be made of elusive, massive particles (WIMPs), or massive neutrinos. Searches have proved inconclusive so far. The possibility remains that Newtonian gravity does not apply everywhere... ...
... (MACHOs). They don’t seem to be enough. If non-baryonic (as likely), dark matter could be made of elusive, massive particles (WIMPs), or massive neutrinos. Searches have proved inconclusive so far. The possibility remains that Newtonian gravity does not apply everywhere... ...
Life and Earth: Philosophical Remedy for Environmental Problems
... “the rare earth hypothesis5”. In their article they claim that the phenomenon for generation and evolution of life that happened on Earth is very rare in the universe. Although it was once thought that life might have existed on Mars or Venus, these possibilities in the solar system have slowly disa ...
... “the rare earth hypothesis5”. In their article they claim that the phenomenon for generation and evolution of life that happened on Earth is very rare in the universe. Although it was once thought that life might have existed on Mars or Venus, these possibilities in the solar system have slowly disa ...
ASTRONOMY 113 Modern Astronomy
... • How big is the Milky Way galaxy? – It would take more than 3,000 years to count the stars in the Milky Way Galaxy at a rate of one per second, and they are spread across 100,000 light-years ...
... • How big is the Milky Way galaxy? – It would take more than 3,000 years to count the stars in the Milky Way Galaxy at a rate of one per second, and they are spread across 100,000 light-years ...
Galaxies - Wallkill Valley Regional High School
... - A flat, rotating disc of mainly young (blue) stars and interstellar matter - A central “bulge” of mainly older (red) stars - A spherical “halo” of stars, including many in globular clusters - A super-massive black hole at the center of the central bulge ...
... - A flat, rotating disc of mainly young (blue) stars and interstellar matter - A central “bulge” of mainly older (red) stars - A spherical “halo” of stars, including many in globular clusters - A super-massive black hole at the center of the central bulge ...
The Search for Another Earth The Search for Another Earth
... ambition, promising insight into humankind's most timeless questions: Where did we come from? Are we alone? ...
... ambition, promising insight into humankind's most timeless questions: Where did we come from? Are we alone? ...
NIE10x301Sponsor Thank You (Page 1)
... divided into elliptical and spiral galaxies. Our own Milky Way is a pretty typical spiral containing ~200 billion stars in spiral arms making up a flat disk 100,000 light years (ly) across and 2500 ly thick, and a central bulge of older stars perhaps 16,000 ly thick. The Sun is 28,000 ly from the ce ...
... divided into elliptical and spiral galaxies. Our own Milky Way is a pretty typical spiral containing ~200 billion stars in spiral arms making up a flat disk 100,000 light years (ly) across and 2500 ly thick, and a central bulge of older stars perhaps 16,000 ly thick. The Sun is 28,000 ly from the ce ...
Olbers` Paradox - NMSU Astronomy
... the line of sight argument: In an infinite, homogeneous Universe every line of sight will end upon the surface of a Star. So why is the sky dark at night? The advantage offered by this argument is that it doesn’t require the stars to be randomly scattered in space, but also works if the stars are g ...
... the line of sight argument: In an infinite, homogeneous Universe every line of sight will end upon the surface of a Star. So why is the sky dark at night? The advantage offered by this argument is that it doesn’t require the stars to be randomly scattered in space, but also works if the stars are g ...
The Milky Way galaxy
... What could this dark matter be? Relic particles from the Big Bang? Lots of 3 solar mass black holes? This is one of the biggest mysteries in modern astronomy. ...
... What could this dark matter be? Relic particles from the Big Bang? Lots of 3 solar mass black holes? This is one of the biggest mysteries in modern astronomy. ...
Hubble`s Expansion of the Universe
... As we go further out into the Universe, eventually we are no longer able to use Cepheid variables as a distance indicator as they become too faint. At this point, we use another object known as type Ia supernovae. A supernova marks the end of a star’s life in an extremely energetic explosion. When a ...
... As we go further out into the Universe, eventually we are no longer able to use Cepheid variables as a distance indicator as they become too faint. At this point, we use another object known as type Ia supernovae. A supernova marks the end of a star’s life in an extremely energetic explosion. When a ...
ASTR 340 - TerpConnect
... Hydrogen and helium together constitute approximately 99 percent of the matter in the universe. All other elements make up the remaining one percent. Among the electrons in this fast one percent, the most abundant is the critically important substance oxygen. An atom of oxygen is composed of a nucle ...
... Hydrogen and helium together constitute approximately 99 percent of the matter in the universe. All other elements make up the remaining one percent. Among the electrons in this fast one percent, the most abundant is the critically important substance oxygen. An atom of oxygen is composed of a nucle ...
Universe ppt - Killeen ISD
... Moving Galaxies - Astronomers use information about how galaxies are moving as one way to develop ideas about how the universe formed. By examining the visible light spectrum of a galaxy, astronomers can tell how fast the galaxy is moving toward or away from our galaxy (the Milky Way). Only a few of ...
... Moving Galaxies - Astronomers use information about how galaxies are moving as one way to develop ideas about how the universe formed. By examining the visible light spectrum of a galaxy, astronomers can tell how fast the galaxy is moving toward or away from our galaxy (the Milky Way). Only a few of ...
Galileo Galilei (1564-1642) - Sunshine Coast Centre RASC
... ► He observed the planet close to what he thought were 3 previously unseen “stars”. ► Next night he was surprised to see that instead of 2 “stars” being to the east and one to the west of the planet, now all 3 were to the west. ► Gradually he started to realise that the “stars” may actually be moons ...
... ► He observed the planet close to what he thought were 3 previously unseen “stars”. ► Next night he was surprised to see that instead of 2 “stars” being to the east and one to the west of the planet, now all 3 were to the west. ► Gradually he started to realise that the “stars” may actually be moons ...
Chapter 31 Galaxies & the Universe
... Astronomers have determined the shape of the Milky Way by using radio waves because they penetrate the interstellar gas and dust without being scattered or absorbed. ...
... Astronomers have determined the shape of the Milky Way by using radio waves because they penetrate the interstellar gas and dust without being scattered or absorbed. ...
Self-avoiding Random Walks and Olbers` Paradox - Serval
... Paradox: the sky would shine like the surface of the sun! Apparently, this is not the case we are interested in. In the following, we will concentrate on the case in which the stars follow the distance distribution of a self-avoiding random walk (of infinite length). Let W be a self-avoiding random w ...
... Paradox: the sky would shine like the surface of the sun! Apparently, this is not the case we are interested in. In the following, we will concentrate on the case in which the stars follow the distance distribution of a self-avoiding random walk (of infinite length). Let W be a self-avoiding random w ...
Birth, Age and the Future of the Universe
... In 1912 Vesto M. Slipher took the first spectra of what was then called spiral “nebulae” (now known to be galaxies). It was a tedious process with small telescopes and slow emulsions. He found the spectral lines shifted toward the red (Figure 1) and he concluded correctly that the objects were hence ...
... In 1912 Vesto M. Slipher took the first spectra of what was then called spiral “nebulae” (now known to be galaxies). It was a tedious process with small telescopes and slow emulsions. He found the spectral lines shifted toward the red (Figure 1) and he concluded correctly that the objects were hence ...
CHAPTER 29 STARS 240 points
... spectral lines. Spectral lines help scientists determine the speed of a star’s motion. Motion between the source of light and the observer cause the spectral lines to shift in wavelength. Depending on whether the wavelength is shorter or longer, the observer can determine if the star is moving towar ...
... spectral lines. Spectral lines help scientists determine the speed of a star’s motion. Motion between the source of light and the observer cause the spectral lines to shift in wavelength. Depending on whether the wavelength is shorter or longer, the observer can determine if the star is moving towar ...
Wh t i C l ? What is Cosmology?
... therefore, in infinite universe, night sky should be infinitely bright (or at least as bright as typical stellar surface – stars themselves block light from behind them) ...
... therefore, in infinite universe, night sky should be infinitely bright (or at least as bright as typical stellar surface – stars themselves block light from behind them) ...
lecture25
... What is the shape of the Milky Way galaxy? How do we know where we are in the Galaxy? What wavelengths of radiation effectively penetrate the dusty interstellar medium? How do we know the rotating structure of the ...
... What is the shape of the Milky Way galaxy? How do we know where we are in the Galaxy? What wavelengths of radiation effectively penetrate the dusty interstellar medium? How do we know the rotating structure of the ...
Universe and Stars Project Final Due Date
... have planned 1 full week to complete research and begin/finish power points in class. Part C will probably be the only part that will need to be done at home IF students are responsible and use their time in class wisely. Nov 30thDecember 5th, students will also have more research time. December 7th ...
... have planned 1 full week to complete research and begin/finish power points in class. Part C will probably be the only part that will need to be done at home IF students are responsible and use their time in class wisely. Nov 30thDecember 5th, students will also have more research time. December 7th ...
Outside the Solar System Outside the Solar System OUTSIDE THE
... This means that if you could travel very, very fast— at the same speed that light travels—the trip from Earth to the Sun would take only eight minutes. The sunlight you see now left the Sun ...
... This means that if you could travel very, very fast— at the same speed that light travels—the trip from Earth to the Sun would take only eight minutes. The sunlight you see now left the Sun ...
Galaxy1
... we find near us 2. Most stars must be high mass because throughout the galaxy we mostly see luminous stars 3. If we combine the two H-R diagrams there are about the same number of high and low mass stars in the Galaxy ...
... we find near us 2. Most stars must be high mass because throughout the galaxy we mostly see luminous stars 3. If we combine the two H-R diagrams there are about the same number of high and low mass stars in the Galaxy ...
Fermi paradox
The Fermi paradox (or Fermi's paradox) is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilizations, such as in the Drake equation, and the lack of evidence for such civilizations. The basic points of the argument, made by physicists Enrico Fermi and Michael H. Hart, are: The Sun is a typical star, and there are billions of stars in the galaxy that are billions of years older. With high probability, some of these stars will have Earth-like planets, and if the earth is typical, some might develop intelligent life. Some of these civilizations might develop interstellar travel, a step the Earth is investigating now. Even at the slow pace of currently envisioned interstellar travel, the Milky Way galaxy could be completely traversed in about a million years.According to this line of thinking, the Earth should already have been visited by extraterrestrial aliens though Fermi saw no convincing evidence of this, nor any signs of alien intelligence anywhere in the observable universe, leading him to ask, ""Where is everybody?""