Stars Stars All Around - Columbus City Schools
... 5.ESS.2 The sun is one of many stars that exist in the universe. The sun appears to be the largest star in the sky because it is the closest star to Earth. Some stars are larger than the sun and some stars are smaller than the sun. ...
... 5.ESS.2 The sun is one of many stars that exist in the universe. The sun appears to be the largest star in the sky because it is the closest star to Earth. Some stars are larger than the sun and some stars are smaller than the sun. ...
SEEING STARS! SEEING STARS!
... What is a plough? (An early instrument of agriculture, drawn by horses and oxen. Now pulled by tractors). What does a plough do? What shape is it? North, south, east, west - how do you find your direction? Compass, sun + watch* (daytime), stars (plough and pole star- night-time). *To use your watch ...
... What is a plough? (An early instrument of agriculture, drawn by horses and oxen. Now pulled by tractors). What does a plough do? What shape is it? North, south, east, west - how do you find your direction? Compass, sun + watch* (daytime), stars (plough and pole star- night-time). *To use your watch ...
10 Measuring The Stars
... Once many stars are plotted on an H–R diagram, a pattern begins to form: These are the 80 closest stars to us; note the dashed lines of constant radius. ...
... Once many stars are plotted on an H–R diagram, a pattern begins to form: These are the 80 closest stars to us; note the dashed lines of constant radius. ...
The Probability and Effects of an Asteroid Impact with Earth
... Since most observations of d Cephei are done in normal lighting conditions, use of a comparison chart with star magnitudes adjusted for dark adaption is inappropriate. Observations near the visual limit are also more accurate than those made of bright stars using telescopes, so the ideal observatio ...
... Since most observations of d Cephei are done in normal lighting conditions, use of a comparison chart with star magnitudes adjusted for dark adaption is inappropriate. Observations near the visual limit are also more accurate than those made of bright stars using telescopes, so the ideal observatio ...
Application Exercise: Distances to Stars Using Measured Parallax
... of the measured parallax method to determine distances to nearby stars, those within about 650 light years from the Sun. Even when observed with the largest telescopes, stars are still just points of light. Although we may be able to tell a lot about a star through its light, these observations do n ...
... of the measured parallax method to determine distances to nearby stars, those within about 650 light years from the Sun. Even when observed with the largest telescopes, stars are still just points of light. Although we may be able to tell a lot about a star through its light, these observations do n ...
Enhanced lithium depletion in Sun-like stars with orbiting planets.
... stars from a CORALIE catalogue11. These stars have been monitored with high precision spectroscopic observations for years in order to detect planetary systems. Of these 451 stars, 70 are reported to host planets and the rest, which we will designate as a comparison sample, (we often call them “sing ...
... stars from a CORALIE catalogue11. These stars have been monitored with high precision spectroscopic observations for years in order to detect planetary systems. Of these 451 stars, 70 are reported to host planets and the rest, which we will designate as a comparison sample, (we often call them “sing ...
Elliptical galaxies
... •for the giant and midsized E, the more luminous the galaxy: the lower its central brightness I(0), and the ...
... •for the giant and midsized E, the more luminous the galaxy: the lower its central brightness I(0), and the ...
Pre-Lab
... The word “galaxy,” having been used in English since the fourteenth century, is as old as this language. Galaxy was derived from the French, Greek, and Latin words for milk. To pre-industrial people, lacking bright lights, the Milky Way, a band of diffuse light stretching across the dark sky, would ...
... The word “galaxy,” having been used in English since the fourteenth century, is as old as this language. Galaxy was derived from the French, Greek, and Latin words for milk. To pre-industrial people, lacking bright lights, the Milky Way, a band of diffuse light stretching across the dark sky, would ...
Chapter 18 - Origin and Evolution of Stars Chapter Preview
... temperature of 8,300 K and a luminosity 30 times that of the Sun. The protostar is beginning to look like a real star. It won’t be this luminous again until it becomes a red giant, in some 10 billion years time. With this fantastic luminosity, still generated by gravitational contraction, the proper ...
... temperature of 8,300 K and a luminosity 30 times that of the Sun. The protostar is beginning to look like a real star. It won’t be this luminous again until it becomes a red giant, in some 10 billion years time. With this fantastic luminosity, still generated by gravitational contraction, the proper ...
Astronomy - Great Smoky Mountains Institute at Tremont
... would be about that size. Go through the rest of the planets in order: Mercury would be a pinhead and Venus would be half a grain of rice. Our planet, Earth, which is 8,000 miles wide, would be the other half of the rice grain. Mars would be another pinhead, Saturn a regular marble, and Uranus and N ...
... would be about that size. Go through the rest of the planets in order: Mercury would be a pinhead and Venus would be half a grain of rice. Our planet, Earth, which is 8,000 miles wide, would be the other half of the rice grain. Mars would be another pinhead, Saturn a regular marble, and Uranus and N ...
s-process
... The heavy n-capture elements were formed predominantly by the r-process at metallicities below [Fe/H] = -2.1. Elements from the s-process appear at a metallicity of [Fe/H] = -2.1, when low-mass AGB stars begin to contribute from double shell burning. The s-process then dominates Ba production. The o ...
... The heavy n-capture elements were formed predominantly by the r-process at metallicities below [Fe/H] = -2.1. Elements from the s-process appear at a metallicity of [Fe/H] = -2.1, when low-mass AGB stars begin to contribute from double shell burning. The s-process then dominates Ba production. The o ...
supernova remnants: a link between massive stars and the
... (1) SN IIP: they are type II SN whose light curve has a plateau. The presence of a plateau in the light decay implies a massive hydrogen envelope. These SNe are the end point of red supergiants (RSG) with relatively low mass-loss rates; they probably come from a single star with a mass of ∼ 10 to 15 ...
... (1) SN IIP: they are type II SN whose light curve has a plateau. The presence of a plateau in the light decay implies a massive hydrogen envelope. These SNe are the end point of red supergiants (RSG) with relatively low mass-loss rates; they probably come from a single star with a mass of ∼ 10 to 15 ...
New Double Stars from Asteroidal Occultations, 1971 - 2008
... two-step change in light level as the occultation Astr. Soc. India, vol. 29, 2001, pp. 577-584. starts or ends. For a double star to be detected and 9. Taylor, G.E. et al, “Occultation of Beta Scorpii C by measured, the separation cannot be much larger than Io on May 14, 1971”, Nature vol. 234, pp. ...
... two-step change in light level as the occultation Astr. Soc. India, vol. 29, 2001, pp. 577-584. starts or ends. For a double star to be detected and 9. Taylor, G.E. et al, “Occultation of Beta Scorpii C by measured, the separation cannot be much larger than Io on May 14, 1971”, Nature vol. 234, pp. ...
Flatfielding chapter for Calibration Volumes
... particular sub-pixel location reliably. If that is not the case, then we should simply command the telescope to move by a pixel or so between each exposure and take whatever random dithering we get. We will have enough stars on each detector to extract the exact offset of each sub-exposure from the ...
... particular sub-pixel location reliably. If that is not the case, then we should simply command the telescope to move by a pixel or so between each exposure and take whatever random dithering we get. We will have enough stars on each detector to extract the exact offset of each sub-exposure from the ...
Eclipsing Binary Stars as Astrophysical Laboratories
... fairly close to each other. So when we see them in the sky, most of the eclipsing binary pairs are much too far away to distinguish or resolve into two stars. They appear to our eyes, with our low resolution, as a single star. Even with powerful telescopes, the stars we study here at Juniata are not ...
... fairly close to each other. So when we see them in the sky, most of the eclipsing binary pairs are much too far away to distinguish or resolve into two stars. They appear to our eyes, with our low resolution, as a single star. Even with powerful telescopes, the stars we study here at Juniata are not ...
Absolute magnitudes and kinematics of barium
... (Jorissen & Boffin 1992) and that the orbital period is related to the orbital separation. It may be possible that mild barium stars have wider separations between components, making more difficult the detection of their binary nature. If we consider the stars with known orbits or with variable radi ...
... (Jorissen & Boffin 1992) and that the orbital period is related to the orbital separation. It may be possible that mild barium stars have wider separations between components, making more difficult the detection of their binary nature. If we consider the stars with known orbits or with variable radi ...
Entropy Production of Main-Sequence Stars
... to discuss of black holes, questions connected with the accelerated expansion of the Universe, to build and generalize gravitation theories, etc. (see, e.g., [6–10]). The majority of the papers, being strictly theoretical, place principal emphasis on functional relations between variables establishe ...
... to discuss of black holes, questions connected with the accelerated expansion of the Universe, to build and generalize gravitation theories, etc. (see, e.g., [6–10]). The majority of the papers, being strictly theoretical, place principal emphasis on functional relations between variables establishe ...
Entropy
... because, according to the modern concepts, stars of the same cluster are formed from the same molecular cloud and therefore have the same age (which is relatively easy to determine) and the same composition (e.g., metallicity [Fe/H]). Furthermore, cluster stars are located at the same distance from ...
... because, according to the modern concepts, stars of the same cluster are formed from the same molecular cloud and therefore have the same age (which is relatively easy to determine) and the same composition (e.g., metallicity [Fe/H]). Furthermore, cluster stars are located at the same distance from ...
Chapter 15
... When stars are viewed through a telescope, they appear as points of light. However some objects in the sky look like "fuzzy" clouds. Some are nebulae (star-forming regions) Others are actually islands of stars that are much farther from us than the individual stars we see in the night sky. These is ...
... When stars are viewed through a telescope, they appear as points of light. However some objects in the sky look like "fuzzy" clouds. Some are nebulae (star-forming regions) Others are actually islands of stars that are much farther from us than the individual stars we see in the night sky. These is ...
Chapter 15, Galaxies
... Use independent measurements to check the luminosity of the standard candle. For example, we can use parallax measurements of the distance to main sequence stars to check measurements of distance using main-sequence fitting. If we do this for a few of them, then we can verify the assumption that the ...
... Use independent measurements to check the luminosity of the standard candle. For example, we can use parallax measurements of the distance to main sequence stars to check measurements of distance using main-sequence fitting. If we do this for a few of them, then we can verify the assumption that the ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.