WEBDA - a tool for CP star research in open clusters
... Abstract. WEBDA (http://www.univie.ac.at/webda) is a site devoted to stellar observational data, such as chemically peculiar stars, in stellar clusters in the Milky Way and the Small Magellanic Cloud. It is intended to provide a reliable synthesis of the available data and knowledge about these obje ...
... Abstract. WEBDA (http://www.univie.ac.at/webda) is a site devoted to stellar observational data, such as chemically peculiar stars, in stellar clusters in the Milky Way and the Small Magellanic Cloud. It is intended to provide a reliable synthesis of the available data and knowledge about these obje ...
2.1 Introduction
... When completed, the current ESA Space Astrometry Mission, Gaia, launched in December 2013, will be a major leap forward: • Positional accuracy: from 0.001 arcsec to 0.00001 arcsec (×102 ) • Distance: from 1 kpc to 100 kpc, sufficient to reach stars in neighbouring galaxies! • Sensitivity: from 10 ma ...
... When completed, the current ESA Space Astrometry Mission, Gaia, launched in December 2013, will be a major leap forward: • Positional accuracy: from 0.001 arcsec to 0.00001 arcsec (×102 ) • Distance: from 1 kpc to 100 kpc, sufficient to reach stars in neighbouring galaxies! • Sensitivity: from 10 ma ...
20.1 Notes
... More massive stars die when their cores become mostly ____________. The core collapses because of its own gravity and rebounds with a shock wave that violently blows the stars outer layers from the core. This huge, bright explosion is called a Type II _________________________. If the core that rema ...
... More massive stars die when their cores become mostly ____________. The core collapses because of its own gravity and rebounds with a shock wave that violently blows the stars outer layers from the core. This huge, bright explosion is called a Type II _________________________. If the core that rema ...
Answers Universe Cornell Notes Chapter 8, Sec 2
... from coolest to hottest: What does a star’s brightness depend on? What is apparent magnitude? What is absolute magnitude? What is the HertsprungRussell Diagram? What does it show? ...
... from coolest to hottest: What does a star’s brightness depend on? What is apparent magnitude? What is absolute magnitude? What is the HertsprungRussell Diagram? What does it show? ...
ORIGIN OF THE UNIVERSE
... - When all of the helium fuel of the Red Giant has been used. The outer layers explode off into space just leaving the white hot core (very small nearing the end of life) ...
... - When all of the helium fuel of the Red Giant has been used. The outer layers explode off into space just leaving the white hot core (very small nearing the end of life) ...
Astronomy 1001
... – Equinoxes still shifting over periods of centuries – Pope Gregory XIII modified the leap years to account for this ...
... – Equinoxes still shifting over periods of centuries – Pope Gregory XIII modified the leap years to account for this ...
ASTR2050 Spring 2005 • In this class we will cover: Brief review
... Interlude: Naming stars Ordinary stars Greek letter (in order of brightness) then constellation e.g. α-Orionis is brightest star in Orion (aka Betelgeuse) δ-Cephei is fourth brightest star in Cepheus Variable stars Listed in order of discovery, starting with “R”, then “S” and on through “Z”, then “ ...
... Interlude: Naming stars Ordinary stars Greek letter (in order of brightness) then constellation e.g. α-Orionis is brightest star in Orion (aka Betelgeuse) δ-Cephei is fourth brightest star in Cepheus Variable stars Listed in order of discovery, starting with “R”, then “S” and on through “Z”, then “ ...
Distance to Stars
... • The brightness a star would appear if it was set at a standard distance from Earth. – Astronomers calculate the stars apparent magnitude and it’s distance from Earth. – Then calculate the brightness if it were a standard distance from Earth. ...
... • The brightness a star would appear if it was set at a standard distance from Earth. – Astronomers calculate the stars apparent magnitude and it’s distance from Earth. – Then calculate the brightness if it were a standard distance from Earth. ...
Herzsprung-Russell Diagram
... Only 6 of the 20 brightest stars in the sky are closer to us than 10pc 14 of the 20 brightest stars in the sky must have absolute magnitude of at least 1.5 (20 times brighter than the Sun) Out of the 6000 stars visible, only 50 are dimmer than the Sun in absolute ...
... Only 6 of the 20 brightest stars in the sky are closer to us than 10pc 14 of the 20 brightest stars in the sky must have absolute magnitude of at least 1.5 (20 times brighter than the Sun) Out of the 6000 stars visible, only 50 are dimmer than the Sun in absolute ...
Homework #7 - Solutions - Department of Physics and Astronomy
... We define a parsec as the distance at which 1 AU subtends 1 arcsecond. Thus, the number of AU in a parsec depends only on the number of arcseconds in a radian, 206,265. Thus, 1 pcMars = 206,265 AUMars. Since 1 AUMars = 1.524 AUEarth Thus, 1 pcMars = 1.524 pcEarth = 1.524 * (206,265 AUearth) = 3.14 x ...
... We define a parsec as the distance at which 1 AU subtends 1 arcsecond. Thus, the number of AU in a parsec depends only on the number of arcseconds in a radian, 206,265. Thus, 1 pcMars = 206,265 AUMars. Since 1 AUMars = 1.524 AUEarth Thus, 1 pcMars = 1.524 pcEarth = 1.524 * (206,265 AUearth) = 3.14 x ...
Ecology Review Science Department
... vast differences in stars through their observations. One theory used to explain these differences is that ...
... vast differences in stars through their observations. One theory used to explain these differences is that ...
here - Boise State University
... 14. What is the cycle or phase a star will spend most of its life in? 15. If our sun is currently 5 billion years old, how much longer will the sun shine brightly for before it runs out of fuel to burn? 16. After our Sun runs our of Hydrogen fuel, what kind of star will it become? 17. What is the na ...
... 14. What is the cycle or phase a star will spend most of its life in? 15. If our sun is currently 5 billion years old, how much longer will the sun shine brightly for before it runs out of fuel to burn? 16. After our Sun runs our of Hydrogen fuel, what kind of star will it become? 17. What is the na ...
The Life Cycle of Stars Webquest
... http://www.seasky.org/cosmic/sky7a01.html and answer the following questions: 1. Stars begin their lives as clouds of dust and gas called_____________. 2. What is a protostar? ...
... http://www.seasky.org/cosmic/sky7a01.html and answer the following questions: 1. Stars begin their lives as clouds of dust and gas called_____________. 2. What is a protostar? ...
Everything Under and Over The Stars
... If the sun went nova, what would happen to the solar system? There was a recent supernova called SN1993J in a star system, which is not mentioned. The powerful shockwave traveled at 44 million mph, but 5 years later it slowed down because of drag caused by particles. There has been a supernova in t ...
... If the sun went nova, what would happen to the solar system? There was a recent supernova called SN1993J in a star system, which is not mentioned. The powerful shockwave traveled at 44 million mph, but 5 years later it slowed down because of drag caused by particles. There has been a supernova in t ...
11.1 Stars - St John Brebeuf
... It is estimated there are more stars in the universe than there are grains of sand on all the beaches on Earth. By peering through the interstellar matter (dust and gases), astronomers can observe the birth of stars. ...
... It is estimated there are more stars in the universe than there are grains of sand on all the beaches on Earth. By peering through the interstellar matter (dust and gases), astronomers can observe the birth of stars. ...
Slide 1
... • A spectroscope works by breaking light into the wavelengths (or spectra) that make it up. Different wavelengths of light bend by different amounts, so it splits the light into its colors. Scientists can tell the elements present in a star by looking at its light through a spectroscope. Each eleme ...
... • A spectroscope works by breaking light into the wavelengths (or spectra) that make it up. Different wavelengths of light bend by different amounts, so it splits the light into its colors. Scientists can tell the elements present in a star by looking at its light through a spectroscope. Each eleme ...
Patterns in the Sky
... - The stars in the night skies form specific patterns in the night sky. - These patterns have been named by many cultures, using names of heroes, mythical monsters, and animals. - Uras Major is the constellation that the Big Dipper is found. - There are 88 constellations recognized. - Different cult ...
... - The stars in the night skies form specific patterns in the night sky. - These patterns have been named by many cultures, using names of heroes, mythical monsters, and animals. - Uras Major is the constellation that the Big Dipper is found. - There are 88 constellations recognized. - Different cult ...
astrophysics 2009
... -in order of increasing size, they are Pluto, Mercury, Mars, Venus, Earth, Uranus, Neptune, Saturn and Jupiter. -the moons or natural satellites orbit the planets. -between Mars and Jupiter there is a gap that is filled with many smaller bodies called asteroids or minor planets. -Comets are of a mix ...
... -in order of increasing size, they are Pluto, Mercury, Mars, Venus, Earth, Uranus, Neptune, Saturn and Jupiter. -the moons or natural satellites orbit the planets. -between Mars and Jupiter there is a gap that is filled with many smaller bodies called asteroids or minor planets. -Comets are of a mix ...
CHAPTER 10, Stellar Motions
... 4. A large fraction of the stars are believed to be binary stars. Estimates range from 50% to 80%, but the exact fraction is not known Binary Star: A gravitationally bound system, consisting of two stars in orbit around a common center of gravity, or barycenter. For any two gravitationally interacti ...
... 4. A large fraction of the stars are believed to be binary stars. Estimates range from 50% to 80%, but the exact fraction is not known Binary Star: A gravitationally bound system, consisting of two stars in orbit around a common center of gravity, or barycenter. For any two gravitationally interacti ...
Hertzsprung Russell diagram
... line in the diagram) and this is called the Main Sequence. Stars that lie in this area are called main sequence stars – the Sun is a main sequence star. In a way stars that lie on the main sequence are ‘normal’ stars while those that lie to one side or other of this area are ‘unusual’ stars – these ...
... line in the diagram) and this is called the Main Sequence. Stars that lie in this area are called main sequence stars – the Sun is a main sequence star. In a way stars that lie on the main sequence are ‘normal’ stars while those that lie to one side or other of this area are ‘unusual’ stars – these ...
No Slide Title
... One parsec is the distance an object must be in order to have a parallax of one arc second. One parsec = 3.3 light years Alpha Centauri is the closest star. Most stars are too distant to measure a parallax. ...
... One parsec is the distance an object must be in order to have a parallax of one arc second. One parsec = 3.3 light years Alpha Centauri is the closest star. Most stars are too distant to measure a parallax. ...
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.