The Milky Way
... • Make sure you have a ride • Maps will be available in case you get separated • Due to time change, we will be out there fairly ...
... • Make sure you have a ride • Maps will be available in case you get separated • Due to time change, we will be out there fairly ...
Astrobiology: young science, old questions
... tems (data from the Extrasolar Planets Encyclo- smallest are just 8% of the Sun’s mass, below our 1 Gyr minimum age to all young stars, over paedia, http://exoplanet.eu/catalog-all.php, 15 which objects can not sustain hydrogen fusion in 10% of all stellar systems are excluded. October 2010). On ave ...
... tems (data from the Extrasolar Planets Encyclo- smallest are just 8% of the Sun’s mass, below our 1 Gyr minimum age to all young stars, over paedia, http://exoplanet.eu/catalog-all.php, 15 which objects can not sustain hydrogen fusion in 10% of all stellar systems are excluded. October 2010). On ave ...
Astronomy Lecture Notes
... - found that the circumference of the Earth is 50 times as large as the distance between Syene and Alexandria, which differed from the true value (about 25,000 miles) by only 15% (or just 2% if using Egyptian measurements!) 2. Hipparchus (ca. 190-120 BC) - often said to be the greatest astronomer of ...
... - found that the circumference of the Earth is 50 times as large as the distance between Syene and Alexandria, which differed from the true value (about 25,000 miles) by only 15% (or just 2% if using Egyptian measurements!) 2. Hipparchus (ca. 190-120 BC) - often said to be the greatest astronomer of ...
CHAPTER REVIEW QUESTIONS 1. In which
... 11. An observer on Earth views the moon as the moon revolves from position 1 to 5 and back to position 1. How will the lighted portion of the moon’s surface change as she sees it over this period? (1) The lighted portion of the moon’s surface will increase. (2) The lighted portion of the moon’s surf ...
... 11. An observer on Earth views the moon as the moon revolves from position 1 to 5 and back to position 1. How will the lighted portion of the moon’s surface change as she sees it over this period? (1) The lighted portion of the moon’s surface will increase. (2) The lighted portion of the moon’s surf ...
Option D Lesson 6 Cosmology and Further - Physics
... • They proposed that in the beginning of the Universe it was at a sufficiently high temperature to produce Helium through fusion. • In this process a great amount of highly energetic radiation would have been produced. However, as the Universe expanded and cooled, the energy of that radiation decrea ...
... • They proposed that in the beginning of the Universe it was at a sufficiently high temperature to produce Helium through fusion. • In this process a great amount of highly energetic radiation would have been produced. However, as the Universe expanded and cooled, the energy of that radiation decrea ...
The Sun Video Focus Questions
... 14. When our sun begins to run out of hydrogen fuel (in about 5 billion years) it will first begin to expand and become much larger. It will also not look yellow, but will be more of a red or orange color. This stage is known as the Red Giant phase. Next, when the sun completely runs out of hydrogen ...
... 14. When our sun begins to run out of hydrogen fuel (in about 5 billion years) it will first begin to expand and become much larger. It will also not look yellow, but will be more of a red or orange color. This stage is known as the Red Giant phase. Next, when the sun completely runs out of hydrogen ...
Dark Matter
... Which of the following statements is incorrect? a) The mass of a galaxy can be measured from its rotation curve. b) More than 90% of the mass of the universe is dark matter c) When Milky Way & Andromeda Galaxy merge, GMC (Giant Molecular Clouds) will collide & lots of new stars will form d) Gal ...
... Which of the following statements is incorrect? a) The mass of a galaxy can be measured from its rotation curve. b) More than 90% of the mass of the universe is dark matter c) When Milky Way & Andromeda Galaxy merge, GMC (Giant Molecular Clouds) will collide & lots of new stars will form d) Gal ...
Teacher Guide pages
... penetrates the atmosphere and impacts the surface of the Earth, it is called a meteorite. Impacts from natural extraterrestrial objects have created craters on Earth, the Moon and other planets. A comet, which usually has a diameter of a few kilometers, is composed largely of frozen carbon dioxide, ...
... penetrates the atmosphere and impacts the surface of the Earth, it is called a meteorite. Impacts from natural extraterrestrial objects have created craters on Earth, the Moon and other planets. A comet, which usually has a diameter of a few kilometers, is composed largely of frozen carbon dioxide, ...
Hubble`s Law
... EXPAND -> points move. Farther points move more, over same time -> faster! But still center seems important egoist located AT CENTER of this picture, says I’m at center of Universe, but what if GREEN? From that perspective, see life looking out from same vantage point, so slide pattern so both viewp ...
... EXPAND -> points move. Farther points move more, over same time -> faster! But still center seems important egoist located AT CENTER of this picture, says I’m at center of Universe, but what if GREEN? From that perspective, see life looking out from same vantage point, so slide pattern so both viewp ...
Oct 2011 - Bays Mountain Park
... focus of our attention these October evenings; it’s well up at dusk and visible 'til just before dawn. Ol' Jove is found between the constellations of Aries and the more elusive Cetus in the east as darkness falls. At magnitude -2.9 it is unmistakable to the naked eye in the fairly blank area betwee ...
... focus of our attention these October evenings; it’s well up at dusk and visible 'til just before dawn. Ol' Jove is found between the constellations of Aries and the more elusive Cetus in the east as darkness falls. At magnitude -2.9 it is unmistakable to the naked eye in the fairly blank area betwee ...
TYPES OF RADIATION IN SPACE
... positrons ( 1 0 00 ). Galactic cosmic rays also have an antimatter component. The antimatter component has been detected using the Alpha Magnetic Spectrometer in the Space Shuttle Discovery that detected 200 antiprotons with energy above 1GeV [1]. A special phenomenon is that galactic cosmic rays al ...
... positrons ( 1 0 00 ). Galactic cosmic rays also have an antimatter component. The antimatter component has been detected using the Alpha Magnetic Spectrometer in the Space Shuttle Discovery that detected 200 antiprotons with energy above 1GeV [1]. A special phenomenon is that galactic cosmic rays al ...
Document
... • RR Lyrae variables used like this to find our place in the Galaxy. • Distances that can be reached depend on the intrinsic brightness of the standard candle – and the limiting magnitude of your telescope ...
... • RR Lyrae variables used like this to find our place in the Galaxy. • Distances that can be reached depend on the intrinsic brightness of the standard candle – and the limiting magnitude of your telescope ...
Chapter 3 The Interstellar Medium
... Individual clouds of gas and dust are given the generic term nebulae. However, the interstellar gas is found to have a diverse range of physical conditions, having very different temperatures, densities and ionisation states. There are several distinct types of nebula, as is described below. The pre ...
... Individual clouds of gas and dust are given the generic term nebulae. However, the interstellar gas is found to have a diverse range of physical conditions, having very different temperatures, densities and ionisation states. There are several distinct types of nebula, as is described below. The pre ...
Dust in Space - Max-Planck
... The further away a galaxy is, however, the more difficult verification becomes. It was thus hailed as a great breakthrough when, a few years ago, scientists succeeded in measuring the thermal emission of dust in the most distant known quasars. The latter are the ultrabright central regions of galaxi ...
... The further away a galaxy is, however, the more difficult verification becomes. It was thus hailed as a great breakthrough when, a few years ago, scientists succeeded in measuring the thermal emission of dust in the most distant known quasars. The latter are the ultrabright central regions of galaxi ...
Astronomy 401 Lecture 18 Galaxy Interactions Here we briefly
... and general interactions of small galaxies with large ones. Consider a small galaxy or cluster of mass M moving through an infinite collection of stars, gas clouds and dark matter, with constant mass density ρ. There are no collisions, and the masses of the individual objects are too small to deflec ...
... and general interactions of small galaxies with large ones. Consider a small galaxy or cluster of mass M moving through an infinite collection of stars, gas clouds and dark matter, with constant mass density ρ. There are no collisions, and the masses of the individual objects are too small to deflec ...
ph507lecnote07
... The emission lines can only occur if the gas in the chromosphere is very hot and the density is very low. The chromosphere is hotter (but less dense) than the photosphere. In the spicules, which are best observed in H , gas is rising at about 20 to 25 km/s. Although spicules occupy less than 1% of t ...
... The emission lines can only occur if the gas in the chromosphere is very hot and the density is very low. The chromosphere is hotter (but less dense) than the photosphere. In the spicules, which are best observed in H , gas is rising at about 20 to 25 km/s. Although spicules occupy less than 1% of t ...
Astronomers Find The Most Distant Star Clusters Hidden Behind A
... Astronomers Find The Most Distant Star Clusters Hidden Behind A Nearby Cluster ScienceDaily (Jan. 14, 2007) — Astronomers have discovered the most distant population of star clusters ever seen, hidden behind one of the nearest such clusters to Earth. At a distance of more than a billion lightyears, ...
... Astronomers Find The Most Distant Star Clusters Hidden Behind A Nearby Cluster ScienceDaily (Jan. 14, 2007) — Astronomers have discovered the most distant population of star clusters ever seen, hidden behind one of the nearest such clusters to Earth. At a distance of more than a billion lightyears, ...
2.1 Hubble Space Telescope
... The galaxy I Zwicky 18 appears to look older the more astronomers study it. The galaxy’s youthful appearance was identified some 40 years ago through observations at the Palomar Observatory. Those studies showed that the galaxy erupted with star formation billions of years after its galactic neighbo ...
... The galaxy I Zwicky 18 appears to look older the more astronomers study it. The galaxy’s youthful appearance was identified some 40 years ago through observations at the Palomar Observatory. Those studies showed that the galaxy erupted with star formation billions of years after its galactic neighbo ...
Primordial planets, comets and moons foster life in the cosmos
... A key result of hydrogravitational dynamics cosmology relevant to astrobiology is the early formation of vast numbers of hot primordial-gas planets in million-solar-mass clumps as the dark matter of galaxies and the hosts of first life. Photon viscous forces in the expanding universe of the turbulen ...
... A key result of hydrogravitational dynamics cosmology relevant to astrobiology is the early formation of vast numbers of hot primordial-gas planets in million-solar-mass clumps as the dark matter of galaxies and the hosts of first life. Photon viscous forces in the expanding universe of the turbulen ...
Galaxies and the Universe bb
... Fate of the universe • Final fate depends on the average _______ of the universe • If the density is _____ than the critical density, then the universe would ________ • Current estimates point to _____ then the critical density and predict an _______________, or open, ...
... Fate of the universe • Final fate depends on the average _______ of the universe • If the density is _____ than the critical density, then the universe would ________ • Current estimates point to _____ then the critical density and predict an _______________, or open, ...
Lab 15 How Many Galaxies Are There in the
... 4. Finally if it takes 10 days for each picture, we can figure out how long it would take to cover the whole sky with similar pictures: (4 points) ...
... 4. Finally if it takes 10 days for each picture, we can figure out how long it would take to cover the whole sky with similar pictures: (4 points) ...
Process Physics: Self-Referential Information and Experiential Reality
... Maxwell did analyses of the technical difficulties in detecting this substratum using light speed measurements, and considered the effects to be too small to be detectable; the idea being to measure the speed of light in different directions. Then because the earth was surely in motion, the speed of ...
... Maxwell did analyses of the technical difficulties in detecting this substratum using light speed measurements, and considered the effects to be too small to be detectable; the idea being to measure the speed of light in different directions. Then because the earth was surely in motion, the speed of ...
Search For Dark Matters Essay Research Paper
... help astronomers better comprehend the universe\’s destiny. Eighty-four years after Albert Einstein introduced the world to his theory of general relativity, scientists are seeing that he was right all along about measuring what we now call dark matter. Astronomers supported by the National Science ...
... help astronomers better comprehend the universe\’s destiny. Eighty-four years after Albert Einstein introduced the world to his theory of general relativity, scientists are seeing that he was right all along about measuring what we now call dark matter. Astronomers supported by the National Science ...
Star Formation
... ultraviolet stars (spectral type O,B) ionize gas in the nebula. The gas then emits light as the electrons return to lower energy levels. In this image Red = Hydrogen, Green = Oxygen, Blue = Sulfur. ...
... ultraviolet stars (spectral type O,B) ionize gas in the nebula. The gas then emits light as the electrons return to lower energy levels. In this image Red = Hydrogen, Green = Oxygen, Blue = Sulfur. ...
Outer space
Outer space, or just space, is the void that exists between celestial bodies, including the Earth. It is not completely empty, but consists of a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust and cosmic rays. The baseline temperature, as set by the background radiation from the Big Bang, is 2.7 kelvin (K). Plasma with a number density of less than one hydrogen atom per cubic metre and a temperature of millions of kelvin in the space between galaxies accounts for most of the baryonic (ordinary) matter in outer space; local concentrations have condensed into stars and galaxies. In most galaxies, observations provide evidence that 90% of the mass is in an unknown form, called dark matter, which interacts with other matter through gravitational but not electromagnetic forces. Data indicates that the majority of the mass-energy in the observable Universe is a poorly understood vacuum energy of space which astronomers label dark energy. Intergalactic space takes up most of the volume of the Universe, but even galaxies and star systems consist almost entirely of empty space.There is no firm boundary where space begins. However the Kármán line, at an altitude of 100 km (62 mi) above sea level, is conventionally used as the start of outer space in space treaties and for aerospace records keeping. The framework for international space law was established by the Outer Space Treaty, which was passed by the United Nations in 1967. This treaty precludes any claims of national sovereignty and permits all states to freely explore outer space. Despite the drafting of UN resolutions for the peaceful uses of outer space, anti-satellite weapons have been tested in Earth orbit.Humans began the physical exploration of space during the 20th century with the advent of high-altitude balloon flights, followed by manned rocket launches. Earth orbit was first achieved by Yuri Gagarin of the Soviet Union in 1961 and unmanned spacecraft have since reached all of the known planets in the Solar System. Due to the high cost of getting into space, manned spaceflight has been limited to low Earth orbit and the Moon.Outer space represents a challenging environment for human exploration because of the dual hazards of vacuum and radiation. Microgravity also has a negative effect on human physiology that causes both muscle atrophy and bone loss. In addition to these health and environmental issues, the economic cost of putting objects, including humans, into space is high.