Astronomy 103 – Midterm 2 – October 29, 2014
... 34. You observe two stars in the sky. Star A is a spectral class O supergiant, star B is a spectral class O white dwarf. What can you say about their temperatures? a) A is hotter than B b) B is hotter than A c) A and B have approximately the same temperature d) We do not have enough information to d ...
... 34. You observe two stars in the sky. Star A is a spectral class O supergiant, star B is a spectral class O white dwarf. What can you say about their temperatures? a) A is hotter than B b) B is hotter than A c) A and B have approximately the same temperature d) We do not have enough information to d ...
The Copernican Model (1543)
... Digression: Orbital Periods and Synodic Periods • The time required for a planet (or other object) to complete an orbit about the Sun with respect to the stars is its Sidereal Period (... sometimes called its orbital period) • The Earth’s orbital period is the Sidereal Year of 365.26 days. (This is ...
... Digression: Orbital Periods and Synodic Periods • The time required for a planet (or other object) to complete an orbit about the Sun with respect to the stars is its Sidereal Period (... sometimes called its orbital period) • The Earth’s orbital period is the Sidereal Year of 365.26 days. (This is ...
Star Classification
... Star Classification The first people to combine a camera with a spectroscope were the father and son team of John and Henry Draper in the 1870s. Their work was carried on by Edward C. Pickering who, by 1918, had listed the spectra of over 200000 stars. Using details about luminosity and composition, ...
... Star Classification The first people to combine a camera with a spectroscope were the father and son team of John and Henry Draper in the 1870s. Their work was carried on by Edward C. Pickering who, by 1918, had listed the spectra of over 200000 stars. Using details about luminosity and composition, ...
What are your ideas about The Universe? - Harvard
... Many people, adults and students alike, are familiar with the names of objects in space, but have an incomplete mental model of WHERE those objects are in space, their relative size and scale, and how they fit into the cosmic scheme of things. Understanding the sizes and distances of celestial objec ...
... Many people, adults and students alike, are familiar with the names of objects in space, but have an incomplete mental model of WHERE those objects are in space, their relative size and scale, and how they fit into the cosmic scheme of things. Understanding the sizes and distances of celestial objec ...
iaf2001_paper (doc - 1.8 MB)
... source of photon flux oscillations, whose amplitude is expected about a few 10-6 (ppm). ...
... source of photon flux oscillations, whose amplitude is expected about a few 10-6 (ppm). ...
NS2-M3C17_-_The_Stars_Exam
... Outside of the Milky Way, in the Magellanic Cloud. In regions where there is little dust and gas. In the spiral arms of the Milky Way galaxy. In regions where there is a great deal of dust and gas. ...
... Outside of the Milky Way, in the Magellanic Cloud. In regions where there is little dust and gas. In the spiral arms of the Milky Way galaxy. In regions where there is a great deal of dust and gas. ...
The Hertzsprung-Russell diagram and the nature of stars
... • Physical argument 1: what holds stars up? • Physical argument 2: what powers the stars (where do they get their energy supply?) ...
... • Physical argument 1: what holds stars up? • Physical argument 2: what powers the stars (where do they get their energy supply?) ...
2007-8 Astronomy Outline
... Time: (try to go out around the same time each night) Light Conditions: (here is where you state how dark it is; cloud cover; how much light is coming in from other houses aka light pollution) Location: where you are and the direction you are facing Observation: (verbally describe what you see with ...
... Time: (try to go out around the same time each night) Light Conditions: (here is where you state how dark it is; cloud cover; how much light is coming in from other houses aka light pollution) Location: where you are and the direction you are facing Observation: (verbally describe what you see with ...
Light from stars part II
... Apparent Magnitude mv (How bright stars appear) • Refined in the 19th Century when instruments became precise enough to accurately measure brightness • Modern scale is defined so that 6th magnitude stars are exactly 100 times brighter than 1st magnitude stars • This means stars that differ in magni ...
... Apparent Magnitude mv (How bright stars appear) • Refined in the 19th Century when instruments became precise enough to accurately measure brightness • Modern scale is defined so that 6th magnitude stars are exactly 100 times brighter than 1st magnitude stars • This means stars that differ in magni ...
evidence found of solar system around nearby star
... Evidence Found of Solar System around Nearby Star By Robert S. Boyd, McClatchy Newspapers October 27, 2008 WASHINGTON — For the first time, astronomers think that they've found evidence of an alien solar system around a star close enough to Earth to be visible to the naked eye. They say that at leas ...
... Evidence Found of Solar System around Nearby Star By Robert S. Boyd, McClatchy Newspapers October 27, 2008 WASHINGTON — For the first time, astronomers think that they've found evidence of an alien solar system around a star close enough to Earth to be visible to the naked eye. They say that at leas ...
Friday, Oct. 10
... You judge the distance to objects (depth perception) from the fact that your two eyes view an object from two different locations, so have to look in different directions to look at an object. The different direction to an object from different positions is called parallax. Astronomers use the chang ...
... You judge the distance to objects (depth perception) from the fact that your two eyes view an object from two different locations, so have to look in different directions to look at an object. The different direction to an object from different positions is called parallax. Astronomers use the chang ...
Great Migrations & other natural history tales
... On the similarities of chemical composition of most pop. I stars Observations show that many stars are surrounded by dust and sometimes detectable gas, in the form of the so-called debris disks or replenished dust disks, originally called Vega-type disks. The Sun has a zodiacal light disk, which is ...
... On the similarities of chemical composition of most pop. I stars Observations show that many stars are surrounded by dust and sometimes detectable gas, in the form of the so-called debris disks or replenished dust disks, originally called Vega-type disks. The Sun has a zodiacal light disk, which is ...
ISP 205: Visions of the Universe
... The rotation of the earth about its axis causes how many of the following? -The rising and setting of the sun -The rising and setting of the moon -The rising and setting of stars -The rising and setting of distant galaxies Answer: 0, 1, 2, 3, or 4? ...
... The rotation of the earth about its axis causes how many of the following? -The rising and setting of the sun -The rising and setting of the moon -The rising and setting of stars -The rising and setting of distant galaxies Answer: 0, 1, 2, 3, or 4? ...
Astro-Spectroscpy
... Though the surface temperature of the Sun is 5,770 degrees Kelvin, the Sun is surrounded by very hot gas in the solar corona at more than a million degrees. Solar flares and coronal mass ejections (CMEs) frequently erupt from the Sun emitting intense radiation and charged particles. ...
... Though the surface temperature of the Sun is 5,770 degrees Kelvin, the Sun is surrounded by very hot gas in the solar corona at more than a million degrees. Solar flares and coronal mass ejections (CMEs) frequently erupt from the Sun emitting intense radiation and charged particles. ...
III. Contents of The Universe
... II. Measuring The Universe A. Light year (ly) Distance light travels in one year 1 ly = 6 trillion miles (6.0 x 1012) Light travels 3.0 x 108m/s or 186,000 mi/s Used for distance between stars, galaxies Closest star (after the sun) – Alpha Centauri (aka Proxima Centauri)- 4.3 ly ...
... II. Measuring The Universe A. Light year (ly) Distance light travels in one year 1 ly = 6 trillion miles (6.0 x 1012) Light travels 3.0 x 108m/s or 186,000 mi/s Used for distance between stars, galaxies Closest star (after the sun) – Alpha Centauri (aka Proxima Centauri)- 4.3 ly ...
Stars and Their Characteristics
... gravitational pull • hydrogen is used up so gravity takes over, which then produces heat by contraction • entire star expands (Red Giant) • core temperature rises enough for helium to fuse into heavier elements, producing a carbon-oxygen core • surface gases are blown away, leaving core (white ...
... gravitational pull • hydrogen is used up so gravity takes over, which then produces heat by contraction • entire star expands (Red Giant) • core temperature rises enough for helium to fuse into heavier elements, producing a carbon-oxygen core • surface gases are blown away, leaving core (white ...
Solar System 09 - MrFuglestad
... • Our knowledge of the interior of Jupiter (and the other gas planets) is highly indirect and likely to remain so for some time. (The data from Galileo's atmospheric probe goes down only about 150 km below the cloud tops.) ...
... • Our knowledge of the interior of Jupiter (and the other gas planets) is highly indirect and likely to remain so for some time. (The data from Galileo's atmospheric probe goes down only about 150 km below the cloud tops.) ...
Lyman-α: The Many Applications and Challenges of This Powerful
... density ratio (D/H), which is an important test of the density of ordinary matter and the creation of H, D, and He in the very early Universe. Since, the observed D/H ratios in the Galactic disk gas are altered by many competing processes, sorting out these processes requires accurate D/H measuremen ...
... density ratio (D/H), which is an important test of the density of ordinary matter and the creation of H, D, and He in the very early Universe. Since, the observed D/H ratios in the Galactic disk gas are altered by many competing processes, sorting out these processes requires accurate D/H measuremen ...
here
... • For these great distances, miles are no longer practical, we use: ‘Light Years’ • the distance it takes light to travel in one year moving at 186,000 miles per second or about 6 million million miles (6 trillion miles) ...
... • For these great distances, miles are no longer practical, we use: ‘Light Years’ • the distance it takes light to travel in one year moving at 186,000 miles per second or about 6 million million miles (6 trillion miles) ...
December 1, 2011 - Perry Local Schools
... it burns faster burns at a much higher temperature gives off more energy than a smaller, cooler star. ...
... it burns faster burns at a much higher temperature gives off more energy than a smaller, cooler star. ...
MBuzaTalk2
... Star begins to fuse iron, which eats up energy. Causes the star to contract, gravity taking over Varying densities causes pressure build up, and then the ‘bounce’ (degenerate core), the star violently ejects large amounts of the star into space. ...
... Star begins to fuse iron, which eats up energy. Causes the star to contract, gravity taking over Varying densities causes pressure build up, and then the ‘bounce’ (degenerate core), the star violently ejects large amounts of the star into space. ...
Nebulas - WLWV Staff Blogs
... Nebulas are clouds of dust and gasses that form between stars. They form in regions where gas, dust, and other materials clump together to create larger masses, which then gather other material until they become big enough to be known as stars. ...
... Nebulas are clouds of dust and gasses that form between stars. They form in regions where gas, dust, and other materials clump together to create larger masses, which then gather other material until they become big enough to be known as stars. ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.