Lecture 1
... • As a group, write down two theories for a given phenomena in which one theory is more parsimonious than the other. ...
... • As a group, write down two theories for a given phenomena in which one theory is more parsimonious than the other. ...
The Interstellar Medium and Star Formation
... • When a cloud collapses to a star it contracts by a factor of nearly 107 – Thus it will be rotating 107 times faster than the GMC – Rotating material naturally collapses into a disk – Rotation will prevent disk from collapsing ...
... • When a cloud collapses to a star it contracts by a factor of nearly 107 – Thus it will be rotating 107 times faster than the GMC – Rotating material naturally collapses into a disk – Rotation will prevent disk from collapsing ...
High School Science Proficiency Review #2 Earth Science
... A. Having the telescope above the atmosphere puts it closer to the object for better magnification. B. Having the telescope above the atmosphere puts it closer to the object for better sound detection. 12. What can we conclude from the observation that nearly C. Some types of electromagnet ...
... A. Having the telescope above the atmosphere puts it closer to the object for better magnification. B. Having the telescope above the atmosphere puts it closer to the object for better sound detection. 12. What can we conclude from the observation that nearly C. Some types of electromagnet ...
HR Diagram of a Star Cluster
... photograph is a member of the cluster NGC 6819 and so we will assume that they all lie at about the same distance from us. Then we can use their apparent magnitude (V) in place of the (preferred) absolute magnitude as the Y-axis. The X-axis will be color index = B-V which is related to the (preferre ...
... photograph is a member of the cluster NGC 6819 and so we will assume that they all lie at about the same distance from us. Then we can use their apparent magnitude (V) in place of the (preferred) absolute magnitude as the Y-axis. The X-axis will be color index = B-V which is related to the (preferre ...
Nov - Wadhurst Astronomical Society
... The rest of Pisces lies between these two limits. Using the left two stars of the square of Pegasus, draw a line towards the horizon, curving it a little to the left you will reach only a modestly bright star near one end of the constellation of Cetus, the whale. The other end can be found by drawin ...
... The rest of Pisces lies between these two limits. Using the left two stars of the square of Pegasus, draw a line towards the horizon, curving it a little to the left you will reach only a modestly bright star near one end of the constellation of Cetus, the whale. The other end can be found by drawin ...
Stars and Galaxies
... Brightest Stars • Brightness depends on size of star, surface temperature, distance from Earth • Apparent Magnitude – brightness of a star as it appears from Earth • Absolute Magnitude – amount of light a star ...
... Brightest Stars • Brightness depends on size of star, surface temperature, distance from Earth • Apparent Magnitude – brightness of a star as it appears from Earth • Absolute Magnitude – amount of light a star ...
1 Epiphany 2014 Following Stars Fr. Frank Schuster In preparation
... our tradition has given to them are Gaspar, Melchior and Balthasar. The meaning of the Magi’s presence before Jesus is the universality of God’s saving plan. You see, the Gospel of Matthew wants to make it clear to us: Jesus wasn’t born to save only Israel. Jesus was born to save the whole world. Of ...
... our tradition has given to them are Gaspar, Melchior and Balthasar. The meaning of the Magi’s presence before Jesus is the universality of God’s saving plan. You see, the Gospel of Matthew wants to make it clear to us: Jesus wasn’t born to save only Israel. Jesus was born to save the whole world. Of ...
ASTRONOMY 313
... triangle approximation. Is it possible to use the techniques of trigonometric parallax to determine the distance to the Sun? Why or why not? ...
... triangle approximation. Is it possible to use the techniques of trigonometric parallax to determine the distance to the Sun? Why or why not? ...
earth & space science
... emits pulses of radio and optical energy. Some neutron stars emit a beam of radio waves that sweeps across space and are detectable here on Earth. These stars are called pulsars. For each pulse detected on Earth, we know that the star has rotated within that period. ...
... emits pulses of radio and optical energy. Some neutron stars emit a beam of radio waves that sweeps across space and are detectable here on Earth. These stars are called pulsars. For each pulse detected on Earth, we know that the star has rotated within that period. ...
Astronomy Webquest Part 1: Life of Stars: Go to http://www.odec.ca
... Go to http://www.odec.ca/projects/2002/wongj/public_html/animations.html 1. Stars are born in _______________. When the clouds of interstellar dust and gas pull in gas and start to collapse, the increased heat will cause the atoms to fuse to helium and form ___________________. Click on next. 2. The ...
... Go to http://www.odec.ca/projects/2002/wongj/public_html/animations.html 1. Stars are born in _______________. When the clouds of interstellar dust and gas pull in gas and start to collapse, the increased heat will cause the atoms to fuse to helium and form ___________________. Click on next. 2. The ...
Date_________________ TWINKLE, TWINKLE
... at a fixed distance away from the Earth1. This is a calculated value and removes distance as a concern when we compare stars. The only thing that affects absolute magnitude is the natural intensity of the star. Some stars are "low beam" while others are "high beam". More importantly, it turns out th ...
... at a fixed distance away from the Earth1. This is a calculated value and removes distance as a concern when we compare stars. The only thing that affects absolute magnitude is the natural intensity of the star. Some stars are "low beam" while others are "high beam". More importantly, it turns out th ...
Pretest
... than low beams do. Also, the closer an oncoming car is to you, the greater the apparent brightness of its headlights (on low or high). 21. Low-mass stars have longer lifetimes than do high-mass stars because low-mass stars use up their fuel much more slowly. 22. Because of high temperatures in the i ...
... than low beams do. Also, the closer an oncoming car is to you, the greater the apparent brightness of its headlights (on low or high). 21. Low-mass stars have longer lifetimes than do high-mass stars because low-mass stars use up their fuel much more slowly. 22. Because of high temperatures in the i ...
MSci Astrophysics 210PHY412 - Queen's University Belfast
... Brown dwarfs (and planets): estimated lower stellar mass limit is 0.08 M (or 80MJup). Lower mass objects have core T too low to ignite H. Red dwarfs: stars whose main-sequence lifetime exceeds the present age of the Universe (estimated as 1-2x1010 yr). Models yield an upper mass limit of stars that ...
... Brown dwarfs (and planets): estimated lower stellar mass limit is 0.08 M (or 80MJup). Lower mass objects have core T too low to ignite H. Red dwarfs: stars whose main-sequence lifetime exceeds the present age of the Universe (estimated as 1-2x1010 yr). Models yield an upper mass limit of stars that ...
18 are exactly the same ones as for galactic star clusters of early
... by Arp and van Sant but they have been confirmed from an analysis of the threecolour measurements alone. NGC 4755 contains an M-type supergiant, four B-type supergiants, and possibly also an A-type supergiant. This is a valuable addition to the number of clusters known to contain such stars and thus ...
... by Arp and van Sant but they have been confirmed from an analysis of the threecolour measurements alone. NGC 4755 contains an M-type supergiant, four B-type supergiants, and possibly also an A-type supergiant. This is a valuable addition to the number of clusters known to contain such stars and thus ...
Epsilon Aurigae Mystery and Opportunity
... and one that was interacting as well. • In 1928, Harlow Shapley correctly concluded the secondary was as massive as the primary, an F0 supergiant star. The companion should be as bright as the primary. • But the spectrum of the system showed no light from the companion at all. • The primary was bein ...
... and one that was interacting as well. • In 1928, Harlow Shapley correctly concluded the secondary was as massive as the primary, an F0 supergiant star. The companion should be as bright as the primary. • But the spectrum of the system showed no light from the companion at all. • The primary was bein ...
Volcanoes and Igneous Activity Earth - Chapter 4
... the needs of other instructors who rely on these materials. ...
... the needs of other instructors who rely on these materials. ...
THE LIFE CYCLE OF A STAR
... The surface temperature of a white dwarf is 8000C or more, but being smaller than the Sun their overall luminosity's are 1% of the Sun or less. White dwarfs are the shrunken remains of normal stars, whose nuclear energy supplies have been used up. White dwarfs consist of degenerate matter with a ver ...
... The surface temperature of a white dwarf is 8000C or more, but being smaller than the Sun their overall luminosity's are 1% of the Sun or less. White dwarfs are the shrunken remains of normal stars, whose nuclear energy supplies have been used up. White dwarfs consist of degenerate matter with a ver ...
The double-degenerate, super-Chandrasekhar nucleus of the
... system seems to have first undergone a phase of mass transfer via wind or stable Roche lobe overflow (RLOF), and then a CE. This is likely, as in order to have two oversized pre-WD stars with R=0.68-0.7 R⊙ still hot, the two events must have happened fast and consecutively. In addition, for the syst ...
... system seems to have first undergone a phase of mass transfer via wind or stable Roche lobe overflow (RLOF), and then a CE. This is likely, as in order to have two oversized pre-WD stars with R=0.68-0.7 R⊙ still hot, the two events must have happened fast and consecutively. In addition, for the syst ...
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.