Have You Seen Canopus Tonight?
... are familiar. Others know Polaris directs us north and no star is closer to our solar system than the Alpha Centauri system. Betelgeuse and Rigel help outline winter’s Orion while Vega, Deneb and Altair form the summer triangle. Regulus, heart of Leo the Lion, heralds spring, and Aldebaran follows t ...
... are familiar. Others know Polaris directs us north and no star is closer to our solar system than the Alpha Centauri system. Betelgeuse and Rigel help outline winter’s Orion while Vega, Deneb and Altair form the summer triangle. Regulus, heart of Leo the Lion, heralds spring, and Aldebaran follows t ...
Lecture 14
... Alternative unit of distance “1 Light Year is the distance traveled by light in one year.” Relation to other units: 1 light year (ly) is equivalent to 0.31 pc 63,270 AU ...
... Alternative unit of distance “1 Light Year is the distance traveled by light in one year.” Relation to other units: 1 light year (ly) is equivalent to 0.31 pc 63,270 AU ...
Constellation Guide Book
... but Aries carried some deep significance for past cultures. It's also got some features of interest for us today. The Facts Image of: A jumping or running ram Time best visible: in December Rank in constellation size: 39th Brightest star: Alpha Arietis, also known as Hamal or El Nath, with a ...
... but Aries carried some deep significance for past cultures. It's also got some features of interest for us today. The Facts Image of: A jumping or running ram Time best visible: in December Rank in constellation size: 39th Brightest star: Alpha Arietis, also known as Hamal or El Nath, with a ...
Constellation Catalog
... Leo is fairly easy to find because the “pointer stars” of the Big Dipper point to Leo. It can be found by looking for the “sickle” starting at the Regulus star. It is located in the second quadrant of the Northern Hemisphere and can be seen at latitudes between +90 and -65. This constellation become ...
... Leo is fairly easy to find because the “pointer stars” of the Big Dipper point to Leo. It can be found by looking for the “sickle” starting at the Regulus star. It is located in the second quadrant of the Northern Hemisphere and can be seen at latitudes between +90 and -65. This constellation become ...
Cuesta College Eclipsing Binary Project Briefing
... “semi-detached”, and “contact”. These terms are used to discuss not only the physical separation of the stars but their gravitational separation using the term Roche Lobe to describe this. Detached, relatively long orbital period where the two stars are separated by a very significant distance where ...
... “semi-detached”, and “contact”. These terms are used to discuss not only the physical separation of the stars but their gravitational separation using the term Roche Lobe to describe this. Detached, relatively long orbital period where the two stars are separated by a very significant distance where ...
11 - Visual Magnitudes Project
... between those of A and B. Attached is a sheet with standard stars and unknown stars for you to identify stars in the eyepiece. Magnitudes for the standards are printed on the finding charts without the decimal point (6.6 magnitude is printed as 66) to avoid confusing the decimal point as a star. Fol ...
... between those of A and B. Attached is a sheet with standard stars and unknown stars for you to identify stars in the eyepiece. Magnitudes for the standards are printed on the finding charts without the decimal point (6.6 magnitude is printed as 66) to avoid confusing the decimal point as a star. Fol ...
Title: Binary interaction dominates the evolution of massive stars
... interactions drastically alter the evolution and final fate of the stars and appear, by far, the most frequent evolutionary channel for massive stars. Based on calculations of binary evolution in short-period systems (6, 27-29) we also find that 20 to 30% of all O stars will merge with their compani ...
... interactions drastically alter the evolution and final fate of the stars and appear, by far, the most frequent evolutionary channel for massive stars. Based on calculations of binary evolution in short-period systems (6, 27-29) we also find that 20 to 30% of all O stars will merge with their compani ...
AAVSO: Epsilon Aurigae
... Variable Star of the Season, January 2008 Epsilon Aurigae The end of the year is the prime observing season for one of the most enigmatic bright variables in our sky -- the mysterious eclipsing binary epsilon Aurigae. Now is an exciting time to familiarize yourself with this fascinating star, as we ...
... Variable Star of the Season, January 2008 Epsilon Aurigae The end of the year is the prime observing season for one of the most enigmatic bright variables in our sky -- the mysterious eclipsing binary epsilon Aurigae. Now is an exciting time to familiarize yourself with this fascinating star, as we ...
Magnitudes - Astronomy @ Walton High School
... a useful way of finding out how bright a star would appear from a certain point in space. By doing this we understand each star's true magnitude. The true absolute magnitude for the Sun is 4.2 whereas to us on Earth it is -27. It is the brightness of a star at a distance of 10 parsecs which is 3 ...
... a useful way of finding out how bright a star would appear from a certain point in space. By doing this we understand each star's true magnitude. The true absolute magnitude for the Sun is 4.2 whereas to us on Earth it is -27. It is the brightness of a star at a distance of 10 parsecs which is 3 ...
The Be/X-ray transient V0332153: evidence for a tilt between the
... temporal behaviour was dominated by random rapid fluctuations (Makishima et al. 1990a). The spectrum was fitted with a power law modified by cyclotron absorption. Unger et al. (1992) found that the pulse profile varied between a double-peaked and a singlepeaked structure. The equivalent hydrogen col ...
... temporal behaviour was dominated by random rapid fluctuations (Makishima et al. 1990a). The spectrum was fitted with a power law modified by cyclotron absorption. Unger et al. (1992) found that the pulse profile varied between a double-peaked and a singlepeaked structure. The equivalent hydrogen col ...
ppt
... apparent magnitude (m) • a measure of its apparent brightness which is the amount of light received from the object • The dimmer an object appears, the higher its apparent magnitude • Hundred times less bright - the same object ten times as far - corresponds to an apparent magnitude that is five mo ...
... apparent magnitude (m) • a measure of its apparent brightness which is the amount of light received from the object • The dimmer an object appears, the higher its apparent magnitude • Hundred times less bright - the same object ten times as far - corresponds to an apparent magnitude that is five mo ...
A Collection of Curricula for the STARLAB Polynesian Voyaging
... (‘), or glottal stop, signals a halting of breath before a vowel. Many centuries ago people looked up at the sky at night and thought that groups of stars formed figures. To these figures they gave names to honor characters or animals in their mythology. At first people in each region gave names of ...
... (‘), or glottal stop, signals a halting of breath before a vowel. Many centuries ago people looked up at the sky at night and thought that groups of stars formed figures. To these figures they gave names to honor characters or animals in their mythology. At first people in each region gave names of ...
LET THE STARS GET IN YOUR EYES SKY MOTIONS
... Stars come in all sizes and colors. Betelgeuse in Orion is one of the largest stars known. It is over 800 times larger than our Sun. The smallest visible stars are white dwarfs which are about the size of the Earth. Neutron stars are about the size of a city but are only detected by radio waves. Our ...
... Stars come in all sizes and colors. Betelgeuse in Orion is one of the largest stars known. It is over 800 times larger than our Sun. The smallest visible stars are white dwarfs which are about the size of the Earth. Neutron stars are about the size of a city but are only detected by radio waves. Our ...
Epsilon Aurigae: a rare stellar eclipse - Project VS
... The eclipse started in early September 2009. Having a year ahead, scientists had quite a bit of time to perform wide range of measurements and reconstruct the system with properties explaining the behavior. It is not an single night event, where the data have to be collected within minutes/hours, ge ...
... The eclipse started in early September 2009. Having a year ahead, scientists had quite a bit of time to perform wide range of measurements and reconstruct the system with properties explaining the behavior. It is not an single night event, where the data have to be collected within minutes/hours, ge ...
Eclipsing Binary Stars as Astrophysical Laboratories
... you some of the research that students and I are doing here at Juniata College on eclipsing binary star systems. My research interests lie in observational astronomy. Students and I work at telescopes taking images and observing the stars themselves. When we look at the night sky, I think most peopl ...
... you some of the research that students and I are doing here at Juniata College on eclipsing binary star systems. My research interests lie in observational astronomy. Students and I work at telescopes taking images and observing the stars themselves. When we look at the night sky, I think most peopl ...
Chapter 13 Measuring the properties of stars
... Star A star is located at the top left of the H-R diagram and has the same luminosity as Star B which is located at the top right of the H-R diagram. How must these stars differ? A. Star A is hotter and bigger than Star B. B. Star A is cooler and bigger than Star B. C. Star A is hotter and smaller ...
... Star A star is located at the top left of the H-R diagram and has the same luminosity as Star B which is located at the top right of the H-R diagram. How must these stars differ? A. Star A is hotter and bigger than Star B. B. Star A is cooler and bigger than Star B. C. Star A is hotter and smaller ...
A) Polaris B) Betelgeuse C) Procyon B D) Sirius 1. Which star has a
... the same luminosity as the star Aldebaran approximately the same temperature as the Rigel. Algol is best classified as a A) main sequence star B) red giant star C) white dwarf star D) red dwarf star 60. Two stars of the same color are plotted on an H-R diagram. Star A is more luminous than star B. W ...
... the same luminosity as the star Aldebaran approximately the same temperature as the Rigel. Algol is best classified as a A) main sequence star B) red giant star C) white dwarf star D) red dwarf star 60. Two stars of the same color are plotted on an H-R diagram. Star A is more luminous than star B. W ...
Observations of binary systems with pulsating components
... • Spectroscopic binaries: stars which exhibit periodic displacement of their spectral lines owing to Doppler effect caused by orbital motion. • Depending on components’ relative brightness, the observed spectrum will show the displacement of lines of one or both components (if a star is too faint, i ...
... • Spectroscopic binaries: stars which exhibit periodic displacement of their spectral lines owing to Doppler effect caused by orbital motion. • Depending on components’ relative brightness, the observed spectrum will show the displacement of lines of one or both components (if a star is too faint, i ...
There are 88 constellations in the sky around the Earth. 12 are the
... Principal stars are Hamal (Alpha ), magnitude 2.0 and Sheratan (Beta), magnitude 2.6. Mesartim (Gamma) is a nice optical double star, magnitudes 4.6 & 4.7, easily resolved with a small telescope. (Magnitude is a measure of how bright a star is – a magnitude 2 star is 2 ½ times fainter than a magnitu ...
... Principal stars are Hamal (Alpha ), magnitude 2.0 and Sheratan (Beta), magnitude 2.6. Mesartim (Gamma) is a nice optical double star, magnitudes 4.6 & 4.7, easily resolved with a small telescope. (Magnitude is a measure of how bright a star is – a magnitude 2 star is 2 ½ times fainter than a magnitu ...
PRESS 2001 Project Report - Hong Kong University of Science and
... common center of mass. The more massive component, which is not necessarily the brighter of the two stars, has the smaller orbit; the relative size of each star's orbit is inversely proportional to its mass. One type of binary system is known as eclipsing binaries, in which the eclipse of one star b ...
... common center of mass. The more massive component, which is not necessarily the brighter of the two stars, has the smaller orbit; the relative size of each star's orbit is inversely proportional to its mass. One type of binary system is known as eclipsing binaries, in which the eclipse of one star b ...
Ch 11a (Measuring Stars 10-28-10)
... IV. Stellar sizes (radius) Luminosity is proportional to surface area (how large) x temperature (how hot): L= 4R2T4 If we can measure the Luminosity and the temperature of a star we can tell how large its ...
... IV. Stellar sizes (radius) Luminosity is proportional to surface area (how large) x temperature (how hot): L= 4R2T4 If we can measure the Luminosity and the temperature of a star we can tell how large its ...
Is the central binary system of the planetary nebula Henize 2
... 428. Maciel (1984) obtained a distance of 1.7 kpc, Cahn and Kaler (1971) derived a distance of 2.7 kpc, while the most recent determination of Frew et al. (2015), using the Hα surface brightness–radius relation is also 2.7 kpc. Based on these values we will scale our expressions with two distances, ...
... 428. Maciel (1984) obtained a distance of 1.7 kpc, Cahn and Kaler (1971) derived a distance of 2.7 kpc, while the most recent determination of Frew et al. (2015), using the Hα surface brightness–radius relation is also 2.7 kpc. Based on these values we will scale our expressions with two distances, ...
Star Magnitude - ScienceEducationatNewPaltz
... Brightness: stars are assigned a number starting with the brightest star starting at about -1 magnitude. Dimmer stars are zero or positive numbers. The larger the number means the dimmer the star is. For example, a star -1 magnitude is brighter than a star 0 magnitude. A star 0 magnitude is brighter ...
... Brightness: stars are assigned a number starting with the brightest star starting at about -1 magnitude. Dimmer stars are zero or positive numbers. The larger the number means the dimmer the star is. For example, a star -1 magnitude is brighter than a star 0 magnitude. A star 0 magnitude is brighter ...
Hertzsprung-Russell Diagram Outline
... An H-R diagram of the brightest stars will preferentially show luminous star because we can see them farther away. An H-R diagram of the nearest stars show many M type stars because M stars are very numerous. HR Diagram ...
... An H-R diagram of the brightest stars will preferentially show luminous star because we can see them farther away. An H-R diagram of the nearest stars show many M type stars because M stars are very numerous. HR Diagram ...
The Significance of Mega Stars
... This leads us to the concept of luminosity, which measures a star’s intrinsic brightness. Generally the luminosity of our Sun is set at the value one (L=1). By way of comparison, then, the luminosity of Sirius is 22 (L=22). In other words Sirius, if it were to be placed alongside our Sun, would appe ...
... This leads us to the concept of luminosity, which measures a star’s intrinsic brightness. Generally the luminosity of our Sun is set at the value one (L=1). By way of comparison, then, the luminosity of Sirius is 22 (L=22). In other words Sirius, if it were to be placed alongside our Sun, would appe ...
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.