the article as PDF - Project VS
... VV Cephei eclipsing binary systems offer the most detailed method of studying mass loss from cool supergiant stars. The long-period of VV Cephei gives it a unique place among eclipsing binaries, but 20.4 years between eclipses make it really hard for scientists to study the system. Such a long inter ...
... VV Cephei eclipsing binary systems offer the most detailed method of studying mass loss from cool supergiant stars. The long-period of VV Cephei gives it a unique place among eclipsing binaries, but 20.4 years between eclipses make it really hard for scientists to study the system. Such a long inter ...
cohen_paris_v2_may2009 - Astronomy at Swarthmore College
... model. Photoelectric absorption’s effect on the profile shapes can be used as a mass-loss rate diagnostic: massloss rates are lower than previously thought. ...
... model. Photoelectric absorption’s effect on the profile shapes can be used as a mass-loss rate diagnostic: massloss rates are lower than previously thought. ...
Draco: The Dragon - Courtney Stookey
... There are many stars worth mentioning in the Draco constellation. Thuban was actually the northern pole star back in 3942 BC until 1793 BC. Egyptian Pyramids were designed to face the North Star, and had special passages so that you could see Thuban at night. Based on the movement of Thuban, it will ...
... There are many stars worth mentioning in the Draco constellation. Thuban was actually the northern pole star back in 3942 BC until 1793 BC. Egyptian Pyramids were designed to face the North Star, and had special passages so that you could see Thuban at night. Based on the movement of Thuban, it will ...
Surveying the Stars
... • What is the significance of the main sequence? — Normal stars that fuse H to He in their cores fall on the main sequence of an H-R diagram. — A star’s mass determines its position along the main sequence (high mass: luminous and blue; low mass: faint and red). ...
... • What is the significance of the main sequence? — Normal stars that fuse H to He in their cores fall on the main sequence of an H-R diagram. — A star’s mass determines its position along the main sequence (high mass: luminous and blue; low mass: faint and red). ...
13.5 The HR Diagram By the early 1900s, astronomers had learned
... therefore red (recall that color is related to temperature), these huge cool stars are called red giants. For example, the bright star Aldebaran in the constellation Taurus is a red giant. Its temperature is about 4000 kelvin and its radius is about 30 times larger than the Sun's. Page 351 A similar ...
... therefore red (recall that color is related to temperature), these huge cool stars are called red giants. For example, the bright star Aldebaran in the constellation Taurus is a red giant. Its temperature is about 4000 kelvin and its radius is about 30 times larger than the Sun's. Page 351 A similar ...
Apparent Magnitude - RanelaghALevelPhysics
... emitted per second (units of Watts). • The Sun’s luminosity is about 4 x 1026 W. • The most luminous stars have a luminosity of about million times that of the Sun! ...
... emitted per second (units of Watts). • The Sun’s luminosity is about 4 x 1026 W. • The most luminous stars have a luminosity of about million times that of the Sun! ...
Document
... • A is incorrect because planets are celestial bodies that typically orbit stars. • B is correct because stars are large bodies of gas that give off light. • C is incorrect because some of the faint dots that can be seen from Earth’s surface are planets and comets. • D is incorrect because comets, n ...
... • A is incorrect because planets are celestial bodies that typically orbit stars. • B is correct because stars are large bodies of gas that give off light. • C is incorrect because some of the faint dots that can be seen from Earth’s surface are planets and comets. • D is incorrect because comets, n ...
HR DIAGRAM (Page 1) - McDonald Observatory
... Looking up into the night sky, you see thousands of stars at varying distances from Earth. The luminosity and temperature of each star varies as well. These are the reasons behind the wide range of apparent magnitudes of stars. Imagine being able to magically pull or push each star (including the su ...
... Looking up into the night sky, you see thousands of stars at varying distances from Earth. The luminosity and temperature of each star varies as well. These are the reasons behind the wide range of apparent magnitudes of stars. Imagine being able to magically pull or push each star (including the su ...
interactive.hr.diagram
... To receive credit, you must answer in complete sentences! Don’t be afraid to think! 1) What is plotted along the horizontal axis of an H-R Diagram? ...
... To receive credit, you must answer in complete sentences! Don’t be afraid to think! 1) What is plotted along the horizontal axis of an H-R Diagram? ...
E3 – Stellar distances
... spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known luminosity in the galaxy. If we had this then we coul ...
... spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known luminosity in the galaxy. If we had this then we coul ...
Magnitude Scale and Distance Measurements
... and this give us a way to find the relative intensities of any two stars, based on their apparent magnitudes. Try a few examples: 1. The apparent magnitude of Spica is +0.98, and the apparent magnitude of Sirius A is -1.44. How many times brighter is Sirius A than Spica? 2. The apparent magnitude of ...
... and this give us a way to find the relative intensities of any two stars, based on their apparent magnitudes. Try a few examples: 1. The apparent magnitude of Spica is +0.98, and the apparent magnitude of Sirius A is -1.44. How many times brighter is Sirius A than Spica? 2. The apparent magnitude of ...
Cepheus (constellation)
... was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. ...
... was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. ...
E3 – Stellar distances
... Parallax method • Only useful for close stars (up to 300 ly (100 pc) as further than that the parallax angle is too small (space based telescopes can use this method to measure stars up to distances of 500 pc). ...
... Parallax method • Only useful for close stars (up to 300 ly (100 pc) as further than that the parallax angle is too small (space based telescopes can use this method to measure stars up to distances of 500 pc). ...
Understanding the H-R Diagram
... Most stars fall into the Main Sequence range, including our sun. They are stable and remain at this stage for about 5 billion years. However, when stars begin to die they become giants and supergiants and they have used up their supply of hydrogen used in the process of nuclear fusion. The core of t ...
... Most stars fall into the Main Sequence range, including our sun. They are stable and remain at this stage for about 5 billion years. However, when stars begin to die they become giants and supergiants and they have used up their supply of hydrogen used in the process of nuclear fusion. The core of t ...
Star Maps - Astronomy Outreach - The University of Texas at Austin
... o When does the star map most accurately represent the sky? -Refer to the dates and times listed on the side of the map. (NOTE: The cardinal directions (north, south, east, west) are listed around the edge of the circle so that you can hold the map up towards the corresponding horizon and see which ...
... o When does the star map most accurately represent the sky? -Refer to the dates and times listed on the side of the map. (NOTE: The cardinal directions (north, south, east, west) are listed around the edge of the circle so that you can hold the map up towards the corresponding horizon and see which ...
Navigating the Night Sky – Teacher Guide Argos Online Subject
... • Identify limitations of the map: o Do the constellations near the horizon on the star map look like the constellations in the sky? If not, how do they look different? -If you are using the star maps in Stardate Magazine, the answer is obviously No. If you are using the star maps from Starmaps.com, ...
... • Identify limitations of the map: o Do the constellations near the horizon on the star map look like the constellations in the sky? If not, how do they look different? -If you are using the star maps in Stardate Magazine, the answer is obviously No. If you are using the star maps from Starmaps.com, ...
night watch - Warren Astronomical Society
... -2The best method for determining the radius of Pluto, as it is for Neptune, is to observe a stellar occultation. It was predicted that Pluto would pass near a 15th magnitude star in 1965, and so the passage was observed very closely by several observatories to see if the star would be occulted. We ...
... -2The best method for determining the radius of Pluto, as it is for Neptune, is to observe a stellar occultation. It was predicted that Pluto would pass near a 15th magnitude star in 1965, and so the passage was observed very closely by several observatories to see if the star would be occulted. We ...
Module code: AA1
... reason their below average luminosity is sufficient to make them appear on the list of the 20 brightest stars. The sample group of the nearest stars is more representative than the group of the brightest stars when wanting to make a statement about the main type of stars in our galaxy as they do not ...
... reason their below average luminosity is sufficient to make them appear on the list of the 20 brightest stars. The sample group of the nearest stars is more representative than the group of the brightest stars when wanting to make a statement about the main type of stars in our galaxy as they do not ...
CYGNUS CONSTELLATION, the Swan Cygnus is
... Alpha Cygni, called Deneb, is the brightest star in Cygnus. It is a white supergiant star of spectral type A2Iae that varies between magnitudes 1.21 and 1.29, one of the largest and most luminous A-class stars known. It is located about 3200 light-years away (an A-type star is a main-sequence (hydro ...
... Alpha Cygni, called Deneb, is the brightest star in Cygnus. It is a white supergiant star of spectral type A2Iae that varies between magnitudes 1.21 and 1.29, one of the largest and most luminous A-class stars known. It is located about 3200 light-years away (an A-type star is a main-sequence (hydro ...
January 2015 - Newbury Astronomical Society
... There are many open clusters to be seen using a modest telescope. The Pleiades is the closest complete cluster to us and therefore appears brightest and easiest to see. The closest noticeable open cluster to us is the Hyades at 153 light years. However some of the stars in the constellation of Ursa ...
... There are many open clusters to be seen using a modest telescope. The Pleiades is the closest complete cluster to us and therefore appears brightest and easiest to see. The closest noticeable open cluster to us is the Hyades at 153 light years. However some of the stars in the constellation of Ursa ...
Climbing the Distance Ladder
... We don’t directly measure a star’s luminosity. We measure its flux (f): the wattage collected per square meter of our telescope mirror. ...
... We don’t directly measure a star’s luminosity. We measure its flux (f): the wattage collected per square meter of our telescope mirror. ...
Lecture 12
... – Brightest stars were placed in the first magnitude class, next brightest were second magnitude, etc. – Based on how bright a star appears to the unaided eye. ...
... – Brightest stars were placed in the first magnitude class, next brightest were second magnitude, etc. – Based on how bright a star appears to the unaided eye. ...
April - Bristol Astronomical Society
... Beta (β) Corvi has the proper name Kraz, this is a modern name and no one is sure of its meaning. The star is a magnitude +2.65 G-class (G5) yellow/white giant. Beta marks the south-eastern corner of the ‘box’. The south-western corner is marked by epsilon (ε) Corvi a magnitude +3.00 Kclass (K2.5) g ...
... Beta (β) Corvi has the proper name Kraz, this is a modern name and no one is sure of its meaning. The star is a magnitude +2.65 G-class (G5) yellow/white giant. Beta marks the south-eastern corner of the ‘box’. The south-western corner is marked by epsilon (ε) Corvi a magnitude +3.00 Kclass (K2.5) g ...
Capella
Capella is the brightest star in the constellation Auriga, the sixth brightest in the night sky and the third brightest in the northern celestial hemisphere, after Arcturus and Vega. Its name is derived from the diminutive of the Latin capra ""goat"", hence ""little goat"". Capella also bears the Bayer designation Alpha Aurigae (often abbreviated to α Aurigae, α Aur or Alpha Aur). Although it appears to be a single star to the naked eye, it is actually a star system of four stars in two binary pairs. The first pair consists of two bright, large type-G giant stars, both with a radius around 10 times that of the Sun and two and a half times its mass, in close orbit around each other. Designated Capella Aa and Capella Ab, these two stars have both exhausted their core hydrogen fuel and become giant stars, though it is unclear exactly what stage they are on the stellar evolutionary pathway. The second pair, around 10,000 astronomical units from the first, consists of two faint, small and relatively cool red dwarfs. They are designated Capella H and Capella L. The stars labelled Capella C through to G and I through to K are actually unrelated stars in the same visual field. The Capella system is relatively close, at only 42.8 light-years (13.1 pc) from Earth.