01 - cloudfront.net
... 19. C 20. B 21. D 22. B 23. C 24. B 25. They move across the sky; they may revolve around another star; they either move away from or toward our solar system. 26. the apparent shift in the wavelength of light emitted by a light source moving toward or away from an observer 27. that those galaxies ar ...
... 19. C 20. B 21. D 22. B 23. C 24. B 25. They move across the sky; they may revolve around another star; they either move away from or toward our solar system. 26. the apparent shift in the wavelength of light emitted by a light source moving toward or away from an observer 27. that those galaxies ar ...
The Hertzsprung-Russell Diagram
... Most stars lie in the main sequence because if a star is hotter it is brighter. Thus you would expect stars of the same size but different temperatures to form a diagonal line since “hotter means brighter” That Main-Sequence is steeper than a ‘same-size diagonal” shows that larger mass ‘normal’ star ...
... Most stars lie in the main sequence because if a star is hotter it is brighter. Thus you would expect stars of the same size but different temperatures to form a diagonal line since “hotter means brighter” That Main-Sequence is steeper than a ‘same-size diagonal” shows that larger mass ‘normal’ star ...
Discussion Activity #11a
... Please choose the best answer. When you are finished, tear this top sheet off and hand it in. The packet of MC questions below is yours to keep. 1. Which of the following statements about various stages of core nuclear burning (hydrogen, helium, carbon, and so on) in a high-mass star is NOT true? A. ...
... Please choose the best answer. When you are finished, tear this top sheet off and hand it in. The packet of MC questions below is yours to keep. 1. Which of the following statements about various stages of core nuclear burning (hydrogen, helium, carbon, and so on) in a high-mass star is NOT true? A. ...
Astronomers spot gluttonous baby stars - asiaa
... speculate that all baby stars may experience such outbursts as part of their growth. The observed steady and continuous accretion can actually only explain a small faction (110 percent) of the final mass of a newborn star. Therefore, astronomers have been intrigued by how the other 9099 percent of ...
... speculate that all baby stars may experience such outbursts as part of their growth. The observed steady and continuous accretion can actually only explain a small faction (110 percent) of the final mass of a newborn star. Therefore, astronomers have been intrigued by how the other 9099 percent of ...
Stars-Chapter 18
... • Astronomers can study the spectrum to find out what elements make up the star ...
... • Astronomers can study the spectrum to find out what elements make up the star ...
Stars
... • Stars begin as a large cloud of gas and dust called a nebula. • Gravity pulls the particles of gas and dust causing the nebula to shrink. • A contracting cloud of gas and dust with enough mass to form a star is called a protostar. (Proto means “earliest” in ...
... • Stars begin as a large cloud of gas and dust called a nebula. • Gravity pulls the particles of gas and dust causing the nebula to shrink. • A contracting cloud of gas and dust with enough mass to form a star is called a protostar. (Proto means “earliest” in ...
PHYSICS 015
... unimaginable. There would be room!) Overall, at this stage the average density is less than that of water. (It is higher in the centres of individual stars, of course, but not dramatically so.) ...
... unimaginable. There would be room!) Overall, at this stage the average density is less than that of water. (It is higher in the centres of individual stars, of course, but not dramatically so.) ...
Ch.1, Sec.3 - Mapping the Stars
... planets and we use the lightyear to measure their distance from us - one light-year represents the distance light travels in 365 days (6 trillion miles @ 186,000 miles per second) ...
... planets and we use the lightyear to measure their distance from us - one light-year represents the distance light travels in 365 days (6 trillion miles @ 186,000 miles per second) ...
Astronomy – Studying the Stars & Space
... • Spectrum – the band of color produced when white light passes through a prism • Parallax – an apparent shift in the position of an object when viewed from different locations • Main sequence – the location on the H-R diagram where most stars lie • Neutron star – a star that has collapsed under gra ...
... • Spectrum – the band of color produced when white light passes through a prism • Parallax – an apparent shift in the position of an object when viewed from different locations • Main sequence – the location on the H-R diagram where most stars lie • Neutron star – a star that has collapsed under gra ...
The Ursa Major Moving Cluster, Collinder 285
... Most of the stars making up the Big Dipper show a common proper motion, as R.A. Proctor has found as early as 1869 (see e.g. Burnham). When W. Huggins, in 1872, determined their radial velocities from their spectra, it became apparent that they move approximately in the same spatial direction, and t ...
... Most of the stars making up the Big Dipper show a common proper motion, as R.A. Proctor has found as early as 1869 (see e.g. Burnham). When W. Huggins, in 1872, determined their radial velocities from their spectra, it became apparent that they move approximately in the same spatial direction, and t ...
1 Ay 124 Winter 2014 – HOMEWORK #1
... Assume for the time being that the Galaxy has no dust, and that we are observing along a line of sight at b = 0 deg and l = 180 deg. We are interested in observing the most distant solar-type stars (MV ' +5.1) possible, but our apparent magnitude limit for the observations is mV = 24.0. The central ...
... Assume for the time being that the Galaxy has no dust, and that we are observing along a line of sight at b = 0 deg and l = 180 deg. We are interested in observing the most distant solar-type stars (MV ' +5.1) possible, but our apparent magnitude limit for the observations is mV = 24.0. The central ...
Integrative Studies 410 Our Place in the Universe
... • Data: Lots of nebulous spots known in the nightsky • Questions: What are they? All the same? Different things? • Need more observations! Build bigger telescopes ...
... • Data: Lots of nebulous spots known in the nightsky • Questions: What are they? All the same? Different things? • Need more observations! Build bigger telescopes ...
Observing: The process of using one or more of your senses to
... Refracting telescope: A telescope that uses convex lenses to gather & focus light (p 592) Observatory: A building that contains one or more telescopes (p 594) Electromagnetic radiation: Energy that can travel through space in the form of waves (p 591) Wavelength: The distance between the crest of on ...
... Refracting telescope: A telescope that uses convex lenses to gather & focus light (p 592) Observatory: A building that contains one or more telescopes (p 594) Electromagnetic radiation: Energy that can travel through space in the form of waves (p 591) Wavelength: The distance between the crest of on ...
Definitions
... Visual magnitude – refers to the magnitude as judged by the eye PG magnitude – refers to magnitudes determined by PG emulsions PG PM – uses PG film to record a section of the sky PE PM – uses a combination of a filter and electronic sensor (CCD, photomultiplier tubes) to detect light signals and con ...
... Visual magnitude – refers to the magnitude as judged by the eye PG magnitude – refers to magnitudes determined by PG emulsions PG PM – uses PG film to record a section of the sky PE PM – uses a combination of a filter and electronic sensor (CCD, photomultiplier tubes) to detect light signals and con ...
Lecture 12
... We can determine a star’s luminosity if we can measure its distance and apparent brightness: Luminosity = 4π (distance)2 (Brightness) ...
... We can determine a star’s luminosity if we can measure its distance and apparent brightness: Luminosity = 4π (distance)2 (Brightness) ...
Section 1.2 Astrometric Data
... in accordance with the observations. In most cases a good empirical fit was obtained by including one or two additional terms in the Taylor expansion of the variation of the barycentric coordinate direction with time. In a few hundred cases even this was not sufficient, and Keplerian elements (somet ...
... in accordance with the observations. In most cases a good empirical fit was obtained by including one or two additional terms in the Taylor expansion of the variation of the barycentric coordinate direction with time. In a few hundred cases even this was not sufficient, and Keplerian elements (somet ...
Five Women at the Crossroads of Astronomy - Physics
... • Get the fun and excitement of doing science across to the young. Stress that science requires imagination, creativity, and ardor. • Provide children with positive role models early on, both in the home and at school. • Nurture everyone who enters college wanting to be a ...
... • Get the fun and excitement of doing science across to the young. Stress that science requires imagination, creativity, and ardor. • Provide children with positive role models early on, both in the home and at school. • Nurture everyone who enters college wanting to be a ...
Chapter 13 Notes – The Deaths of Stars
... Sun will expand to a red giant in ______________ billion years Expands to ______________ radius Earth will then be ___________________ Sun MAY form a ________________ nebula (but uncertain) Sun’s C, O core will become a ______________ dwarf VIII. The Deaths of Massive Stars: Supernovae F ...
... Sun will expand to a red giant in ______________ billion years Expands to ______________ radius Earth will then be ___________________ Sun MAY form a ________________ nebula (but uncertain) Sun’s C, O core will become a ______________ dwarf VIII. The Deaths of Massive Stars: Supernovae F ...
Elements and Isotopes - University of California, Berkeley
... The most common elements are : H (90%) , He (10%), C,N,O (0.1%) They are made by stars… Hydrogen burning in high mass stars The “CNO” cycle Start here ...
... The most common elements are : H (90%) , He (10%), C,N,O (0.1%) They are made by stars… Hydrogen burning in high mass stars The “CNO” cycle Start here ...
An Introduction to the Night Sky Stars and Constellations
... An Introduction to the Night Sky Stars and Constellations 1. What is the Latin root word of star? 2. Why do stars “twinkle”? 3. Why do planets “shine”? ...
... An Introduction to the Night Sky Stars and Constellations 1. What is the Latin root word of star? 2. Why do stars “twinkle”? 3. Why do planets “shine”? ...
ASTR 300 Stars and Stellar Systems Spring 2011
... of space because these stars are very rare. On the other hand, the least luminous stars are quite common, but are so faint they are hard to see even if they are close. 2. The parallax of the bright star Vega is 0.129 seconds of arc. What is the distance of Vega in parsecs ? In light-years ? We have ...
... of space because these stars are very rare. On the other hand, the least luminous stars are quite common, but are so faint they are hard to see even if they are close. 2. The parallax of the bright star Vega is 0.129 seconds of arc. What is the distance of Vega in parsecs ? In light-years ? We have ...
ASTR 1101-001 Spring 2008 - Louisiana State University
... • Kirchhoff’s 1st Law: Hot dense gas produces a continuous spectrum (a complete rainbow of colors) • A plot of light intensity versus wavelength always has the ...
... • Kirchhoff’s 1st Law: Hot dense gas produces a continuous spectrum (a complete rainbow of colors) • A plot of light intensity versus wavelength always has the ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.