Stellar Evolution
... Expansion into a Red Giant Hydrogen in the core completely converted into He: → “Hydrogen burning” (i.e. fusion of H into He) ceases in the core. ...
... Expansion into a Red Giant Hydrogen in the core completely converted into He: → “Hydrogen burning” (i.e. fusion of H into He) ceases in the core. ...
Research Essay “On the Origin of the Solar System”
... The origin of the Solar System is one of the oldest unsolved problems in science. It was first separated as a question distinct from the Origin of the Universe in the 17th century, when Copernicus made it meaningful to use the modern phrase “Solar System” and the Sun began to be thought of as one o ...
... The origin of the Solar System is one of the oldest unsolved problems in science. It was first separated as a question distinct from the Origin of the Universe in the 17th century, when Copernicus made it meaningful to use the modern phrase “Solar System” and the Sun began to be thought of as one o ...
Foundations III The Stars
... One of the latest discovered Exoplanets: (reported September 29, 2010) ...
... One of the latest discovered Exoplanets: (reported September 29, 2010) ...
GY 112 Lecture Notes - University of South Alabama
... material to explain the gravity that we knew was there. The solution? Invent invisible matter. Thus was born “dark matter”. You got to love physics. If reality doesn’t fit your ideas, change reality. The rest of us poor scientists actually have to prove our ideas. Now don’t get me wrong. I actually ...
... material to explain the gravity that we knew was there. The solution? Invent invisible matter. Thus was born “dark matter”. You got to love physics. If reality doesn’t fit your ideas, change reality. The rest of us poor scientists actually have to prove our ideas. Now don’t get me wrong. I actually ...
Cosmic Distance Ladder
... Limits of Parallax Method • Refraction caused by the atmosphere limits the accuracy to 0.01 arcseconds. • d=1/p|d|=|p|/p2 • Reliable measurements, those with errors of 10% or less, can only be achieved at stellar distances of no more than about 100 pc. • Space-based telescopes are not limited by ...
... Limits of Parallax Method • Refraction caused by the atmosphere limits the accuracy to 0.01 arcseconds. • d=1/p|d|=|p|/p2 • Reliable measurements, those with errors of 10% or less, can only be achieved at stellar distances of no more than about 100 pc. • Space-based telescopes are not limited by ...
Light - Dan Caton
... • Transitions are to/from n=2 level • 3/2 is smallest change, thus lowest energy, thus ?? Color? • What is the Balmer limit shown? ...
... • Transitions are to/from n=2 level • 3/2 is smallest change, thus lowest energy, thus ?? Color? • What is the Balmer limit shown? ...
November 2014 - Hermanus Astronomy
... A team of British, Swiss, and Belgian astronomers made the discoveries around the stars WASP-94A and WASP-94B. The British WASP-South survey, operated by Keele University, found tiny dips in the light of WASP-94A, suggesting that a Jupiter-like planet was transiting the star. Swiss astronomers then ...
... A team of British, Swiss, and Belgian astronomers made the discoveries around the stars WASP-94A and WASP-94B. The British WASP-South survey, operated by Keele University, found tiny dips in the light of WASP-94A, suggesting that a Jupiter-like planet was transiting the star. Swiss astronomers then ...
level 1
... convert distances to parsecs and astronomical units, and then use this data to create your Infographic. ...
... convert distances to parsecs and astronomical units, and then use this data to create your Infographic. ...
Astronomy Through the Ages: 2 Middle ages through Renaissance
... Mars than any other planet. – But the Mars positions Tycho had recorded did not fit well with any of the models, Ptolemy’s, Copernicus’ or Tycho’s. – The best match of Mars data to a Copernican orbit left him with an discrepancy of 8 arc minutes. • It was larger than the accuracy of Tycho’s data (wh ...
... Mars than any other planet. – But the Mars positions Tycho had recorded did not fit well with any of the models, Ptolemy’s, Copernicus’ or Tycho’s. – The best match of Mars data to a Copernican orbit left him with an discrepancy of 8 arc minutes. • It was larger than the accuracy of Tycho’s data (wh ...
PHYSICS 1500 - ASTRONOMY TOTAL: 100 marks Section A Please
... Question 15 Why does the disk of our galaxy appear blue? (a) all the red starlight is scattered out of our view. (b) the blue light is recombination radiation from HII regions. (c) the blue light is emission from elements in the interstellar medium heavier than hydrogen. (d) it is illuminated by the ...
... Question 15 Why does the disk of our galaxy appear blue? (a) all the red starlight is scattered out of our view. (b) the blue light is recombination radiation from HII regions. (c) the blue light is emission from elements in the interstellar medium heavier than hydrogen. (d) it is illuminated by the ...
First Exam - University of Iowa Astrophysics
... 26. You look up in the night sky and see the planet Jupiter, the planet Mars, and the Moon very close together. You know that they are located in or close to one of the following. Which is it? (a) the ecliptic ∗ (b) the celestial equator (c) the zenith (d) the north celestial pole (e) the constellat ...
... 26. You look up in the night sky and see the planet Jupiter, the planet Mars, and the Moon very close together. You know that they are located in or close to one of the following. Which is it? (a) the ecliptic ∗ (b) the celestial equator (c) the zenith (d) the north celestial pole (e) the constellat ...
Cutting-edge chemistry
... when the first planet from another galaxy was discovered in the Milky Way: http://bit.ly/16xbYVj ...
... when the first planet from another galaxy was discovered in the Milky Way: http://bit.ly/16xbYVj ...
April 10th
... • Hot core ionizes the escaping atmosphere • Colors come from a mix of emission lines such as oxygen (green), nitrogen (red), and hydrogen ...
... • Hot core ionizes the escaping atmosphere • Colors come from a mix of emission lines such as oxygen (green), nitrogen (red), and hydrogen ...
12-3 Planets and Satellites Types of Orbits
... objects are not points. Near side of Earth is closer to Moon than far side, so the magnitude of the gravitational force is not the same on both sides. This difference in gravitational forces on different parts of an extended object is the tidal force. ...
... objects are not points. Near side of Earth is closer to Moon than far side, so the magnitude of the gravitational force is not the same on both sides. This difference in gravitational forces on different parts of an extended object is the tidal force. ...
PS 224, Fall 2014 HW 4
... Since their temperatures are similar, we need find out which one is brighter. But brightness depends on distance as well. So I would find a way to measure the distance to these stars. The further away one is the red giant. 3. Future Skies. As a red giant, the Sun will have an angular size in Earth’s ...
... Since their temperatures are similar, we need find out which one is brighter. But brightness depends on distance as well. So I would find a way to measure the distance to these stars. The further away one is the red giant. 3. Future Skies. As a red giant, the Sun will have an angular size in Earth’s ...
A Giant Planet Around a Metal-poor Star of Extragalactic Origin
... any previously known exoplanet hosting star (Fig. 3). For the existing theories of hot giant planet formation, metallicity is an important parameter: in particular, it is fundamental for the core-accretion planet formation model (43). It might be that initially, in the planet formation phase, HIP 1 ...
... any previously known exoplanet hosting star (Fig. 3). For the existing theories of hot giant planet formation, metallicity is an important parameter: in particular, it is fundamental for the core-accretion planet formation model (43). It might be that initially, in the planet formation phase, HIP 1 ...
Document
... light years to measure the distance of stars A light-year is the distance that light travels in a vacuum in a year Proxima Centauri, is the closest star to the sun. ...
... light years to measure the distance of stars A light-year is the distance that light travels in a vacuum in a year Proxima Centauri, is the closest star to the sun. ...
Chapter 4. Orbits
... complex and they are generally impossible to solve. One usually goes to numerical simulations on large computers and basically integrates the equations of motion, adding up the forces from all the various objects and then calculating how each object will move and then doing it again for the next “ti ...
... complex and they are generally impossible to solve. One usually goes to numerical simulations on large computers and basically integrates the equations of motion, adding up the forces from all the various objects and then calculating how each object will move and then doing it again for the next “ti ...
Final Exam Space Unit Review
... b) liquid: more complicated, more efficient because can control amount of fuel entering combustion chamber so can stop or throttle. They have a higher exhaust velocity than solid fuels. Check on this c) Physics: For every reaction there is an equal and opposite reaction d) gravitational assist “slin ...
... b) liquid: more complicated, more efficient because can control amount of fuel entering combustion chamber so can stop or throttle. They have a higher exhaust velocity than solid fuels. Check on this c) Physics: For every reaction there is an equal and opposite reaction d) gravitational assist “slin ...
In the Spring of 2007 two of us began planning a new course in
... d. mass e. chemical makeup 15. Current evidence about how the universe is changing tells us that a. We are near the center of the universe. b. Galaxies are expanding into empty space. c. Groups of galaxies appear to move away from each other d. Nearby galaxies are younger than distant galaxies. 16. ...
... d. mass e. chemical makeup 15. Current evidence about how the universe is changing tells us that a. We are near the center of the universe. b. Galaxies are expanding into empty space. c. Groups of galaxies appear to move away from each other d. Nearby galaxies are younger than distant galaxies. 16. ...
Wide-eyed Telescope Finds its First Transiting
... Finding planets that pass in front of their parent stars is so important to understanding how planets form that the European Space Agency will shortly launch the €35M COROT satellite to find them. But a team of UK, French and Swiss astronomers is already paving the way from the ground, with today’s ...
... Finding planets that pass in front of their parent stars is so important to understanding how planets form that the European Space Agency will shortly launch the €35M COROT satellite to find them. But a team of UK, French and Swiss astronomers is already paving the way from the ground, with today’s ...
Wide-eyed Telescope Finds its First Transiting
... Finding planets that pass in front of their parent stars is so important to understanding how planets form that the European Space Agency will shortly launch the €35M COROT satellite to find them. But a team of UK, French and Swiss astronomers is already paving the way from the ground, with today’s ...
... Finding planets that pass in front of their parent stars is so important to understanding how planets form that the European Space Agency will shortly launch the €35M COROT satellite to find them. But a team of UK, French and Swiss astronomers is already paving the way from the ground, with today’s ...
–1– AST104 Sp04: WELCOME TO EXAM 1 Multiple Choice
... 46. The sidereal drive on a telescope mount38. If source A emits radio waves at a frequency ing turns the telescope westward about the polar 4 times that of source B, then the wavelength of axis to remain pointed toward a distant object. radio waves from A is (T) a. the same as that from B b. 16 tim ...
... 46. The sidereal drive on a telescope mount38. If source A emits radio waves at a frequency ing turns the telescope westward about the polar 4 times that of source B, then the wavelength of axis to remain pointed toward a distant object. radio waves from A is (T) a. the same as that from B b. 16 tim ...
Planetary habitability
Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and sustain life. Life may develop directly on a planet or satellite or be transferred to it from another body, a theoretical process known as panspermia. As the existence of life beyond Earth is unknown, planetary habitability is largely an extrapolation of conditions on Earth and the characteristics of the Sun and Solar System which appear favourable to life's flourishing—in particular those factors that have sustained complex, multicellular organisms and not just simpler, unicellular creatures. Research and theory in this regard is a component of planetary science and the emerging discipline of astrobiology.An absolute requirement for life is an energy source, and the notion of planetary habitability implies that many other geophysical, geochemical, and astrophysical criteria must be met before an astronomical body can support life. In its astrobiology roadmap, NASA has defined the principal habitability criteria as ""extended regions of liquid water, conditions favourable for the assembly of complex organic molecules, and energy sources to sustain metabolism.""In determining the habitability potential of a body, studies focus on its bulk composition, orbital properties, atmosphere, and potential chemical interactions. Stellar characteristics of importance include mass and luminosity, stable variability, and high metallicity. Rocky, terrestrial-type planets and moons with the potential for Earth-like chemistry are a primary focus of astrobiological research, although more speculative habitability theories occasionally examine alternative biochemistries and other types of astronomical bodies.The idea that planets beyond Earth might host life is an ancient one, though historically it was framed by philosophy as much as physical science. The late 20th century saw two breakthroughs in the field. The observation and robotic spacecraft exploration of other planets and moons within the Solar System has provided critical information on defining habitability criteria and allowed for substantial geophysical comparisons between the Earth and other bodies. The discovery of extrasolar planets, beginning in the early 1990s and accelerating thereafter, has provided further information for the study of possible extraterrestrial life. These findings confirm that the Sun is not unique among stars in hosting planets and expands the habitability research horizon beyond the Solar System.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently. On 4 November 2013, astronomers reported, based on Kepler space mission data, that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs within the Milky Way. 11 billion of these estimated planets may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists.