Binary Stars
... To see an eclipse, we have to be close to the plane of the mutual orbit so that (from our point of view) one star occasionally passes in front of the other. But (from ASTR 101) remember how rare the transits of Venus are: once a century or so. We would see more frequent transits if Venus was much cl ...
... To see an eclipse, we have to be close to the plane of the mutual orbit so that (from our point of view) one star occasionally passes in front of the other. But (from ASTR 101) remember how rare the transits of Venus are: once a century or so. We would see more frequent transits if Venus was much cl ...
Orion – The Hunter - Guild of Students
... the scorpion in the night sky as the constellations Orion and Scorpius. She placed the scorpion opposite him, so that never are the two visible at once. The sky shows him followed by his two fighting dogs, Canis Major and Minor, and fighting a bull, Taurus. Oddly, the bull is completely irrelevant t ...
... the scorpion in the night sky as the constellations Orion and Scorpius. She placed the scorpion opposite him, so that never are the two visible at once. The sky shows him followed by his two fighting dogs, Canis Major and Minor, and fighting a bull, Taurus. Oddly, the bull is completely irrelevant t ...
The birth and life of stars
... RR Lyrae variables are low-mass, pulsating variables with short periods. Cepheid variables are high-mass, pulsating variables exhibiting a regular relationship between the period of pulsation and luminosity. Mass can be transferred from one star to another in close binary systems. When this occu ...
... RR Lyrae variables are low-mass, pulsating variables with short periods. Cepheid variables are high-mass, pulsating variables exhibiting a regular relationship between the period of pulsation and luminosity. Mass can be transferred from one star to another in close binary systems. When this occu ...
Scientists discover surprising importance of `I Love Q` for
... star when squished. The larger the number, the more deformed the star is. The third quantity, "Q," refers to the changing shape of a star. ...
... star when squished. The larger the number, the more deformed the star is. The third quantity, "Q," refers to the changing shape of a star. ...
Stars - Mike Brotherton
... The Deaths of Massive Stars: Supernovae Final stages of fusion in high-mass stars (> 8 Msun), leading to the formation of an iron core, happen extremely rapidly: Si burning lasts only for ~ 1 day. Iron core ultimately collapses, triggering an explosion that destroys the star: ...
... The Deaths of Massive Stars: Supernovae Final stages of fusion in high-mass stars (> 8 Msun), leading to the formation of an iron core, happen extremely rapidly: Si burning lasts only for ~ 1 day. Iron core ultimately collapses, triggering an explosion that destroys the star: ...
Chapter 17 Measuring the Stars
... 17.5 The Hertzsprung-Russell Diagram Once many stars are plotted on an H-R diagram, a pattern begins to form: These are the 80 closest stars to us; note the dashed lines of constant radius. The darkened curve is called the main sequence, as this is where most stars are. Also indicated is the white ...
... 17.5 The Hertzsprung-Russell Diagram Once many stars are plotted on an H-R diagram, a pattern begins to form: These are the 80 closest stars to us; note the dashed lines of constant radius. The darkened curve is called the main sequence, as this is where most stars are. Also indicated is the white ...
Measuring the Stars pages 813-820
... The age, like the age of Aquarius is the house that the axis of the Earth is pointing to for about the next 2,000 years. The Earth has a wobble, and the axis will only point at Polaris for a few hundred years, then, another star will be north. The ancient Egyptians could not have used Polaris as a c ...
... The age, like the age of Aquarius is the house that the axis of the Earth is pointing to for about the next 2,000 years. The Earth has a wobble, and the axis will only point at Polaris for a few hundred years, then, another star will be north. The ancient Egyptians could not have used Polaris as a c ...
Here - Amateur Observers` Society of New York
... Plot the orbital motion of a Planet: This can be done easily by drawing the starfield round a planet on two or more separate nights and recording the movement of the planet against the background stars, which do not move. Orbital motion can be plotted visually, through binoculars or telescopes, with ...
... Plot the orbital motion of a Planet: This can be done easily by drawing the starfield round a planet on two or more separate nights and recording the movement of the planet against the background stars, which do not move. Orbital motion can be plotted visually, through binoculars or telescopes, with ...
Luminosity
... – Newton’s version of Kepler’s third law tells us the total mass of a binary system, if we can measure the orbital period (p) and average orbital separation of the system (a) ...
... – Newton’s version of Kepler’s third law tells us the total mass of a binary system, if we can measure the orbital period (p) and average orbital separation of the system (a) ...
How big are stars? How do we know?
... b) relatively cool giant stars that are relatively close to the Sun. c) relatively cool main-sequence stars that are relatively far from the Sun. d) relatively cool main-sequence stars that are relatively close to the Sun. e) giant stars and relatively hot main sequence stars. ...
... b) relatively cool giant stars that are relatively close to the Sun. c) relatively cool main-sequence stars that are relatively far from the Sun. d) relatively cool main-sequence stars that are relatively close to the Sun. e) giant stars and relatively hot main sequence stars. ...
theh – rdiagramsofyoungclust ersandtheformati on ofp
... lent considerable support to the hypothesis of gravitational contraction but, at the same time, it biased somewhat the attitudes with which the empirical evidence was looked upon. Haro has pointed out that, for a number of years, there has been some evidence that the H-R diagrams of young clusters a ...
... lent considerable support to the hypothesis of gravitational contraction but, at the same time, it biased somewhat the attitudes with which the empirical evidence was looked upon. Haro has pointed out that, for a number of years, there has been some evidence that the H-R diagrams of young clusters a ...
Galaxies, Cosmology and the Accelera`ng Universe
... • Current thinking is that the thick disk stars were originally in the thin disk but were sca?ered • (some recent observa6ons suggest that there is not such a big difference between the thick and ...
... • Current thinking is that the thick disk stars were originally in the thin disk but were sca?ered • (some recent observa6ons suggest that there is not such a big difference between the thick and ...
Arcturus - bYTEBoss
... Another version portrays Boötes as a grape grower called Icarius, who one day invited the Roman god Bacchus, also called Dionysus, to inspect his vineyards. Bacchus revealed the secret of wine making to Icarius, who was so impressed by this alcoholic beverage that he invited his friends round to sam ...
... Another version portrays Boötes as a grape grower called Icarius, who one day invited the Roman god Bacchus, also called Dionysus, to inspect his vineyards. Bacchus revealed the secret of wine making to Icarius, who was so impressed by this alcoholic beverage that he invited his friends round to sam ...
Canis Majoris
... Canis Majoris is the largest star that has so far been discovered. When viewed from earth it’s very tiny, which means it has a very small apparent magnitude. Canis Majoris is so large that you could fit about seven quadrillion earths inside of it. To put this into perspective, if earth were the size ...
... Canis Majoris is the largest star that has so far been discovered. When viewed from earth it’s very tiny, which means it has a very small apparent magnitude. Canis Majoris is so large that you could fit about seven quadrillion earths inside of it. To put this into perspective, if earth were the size ...
A New Variable Star in Perseus
... The secondary minima are shown in Figure 6 and Figure 7. Using this two minima, the duration of the flat part of the secondary minimum is determined as 583 minutes. ...
... The secondary minima are shown in Figure 6 and Figure 7. Using this two minima, the duration of the flat part of the secondary minimum is determined as 583 minutes. ...
LIFE CYCLE OF STARS
... Cool at the end of the Red Giant stage faster than larger stars, so they begin to shed its gases outside its core forming a planetary nebula . The center of the small star then begins to cool to become a white dwarf and cools more to become a black dwarf. Large Stars Larger stars are hotter th ...
... Cool at the end of the Red Giant stage faster than larger stars, so they begin to shed its gases outside its core forming a planetary nebula . The center of the small star then begins to cool to become a white dwarf and cools more to become a black dwarf. Large Stars Larger stars are hotter th ...
this PDF file - University of Leicester Open Journals
... had predicted was finally directly observed. The star is too faint to be seen without a powerful telescope. The bright star we can see is called Sirius A and the companion star predicted by Bessel is Sirius B – a white dwarf, so called due to its small size and white hot glow. The existence of this ...
... had predicted was finally directly observed. The star is too faint to be seen without a powerful telescope. The bright star we can see is called Sirius A and the companion star predicted by Bessel is Sirius B – a white dwarf, so called due to its small size and white hot glow. The existence of this ...
Constellation
... constellation has alpha in its name, because it’s the first letter of the Greek alphabet. The brightest star in the constellation Perseus is called Alpha Persei. The second brightest is Beta Persei. (Beta is the second letter in the Greek alphabet.) The star closest to the Sun is Alpha Centauri. Thi ...
... constellation has alpha in its name, because it’s the first letter of the Greek alphabet. The brightest star in the constellation Perseus is called Alpha Persei. The second brightest is Beta Persei. (Beta is the second letter in the Greek alphabet.) The star closest to the Sun is Alpha Centauri. Thi ...
Chapter 13 (Properties of Stars)
... diagram, yet the majority of nearby stars are found to the lower right of our star. Relate this to the limitations of human vision. 3. Sirius and its companion are almost the same temperature, yet Sirius is about 10,000x brighter than its companion. Explain why they differ so much in luminosity. 4. ...
... diagram, yet the majority of nearby stars are found to the lower right of our star. Relate this to the limitations of human vision. 3. Sirius and its companion are almost the same temperature, yet Sirius is about 10,000x brighter than its companion. Explain why they differ so much in luminosity. 4. ...
Picture: Alnitak is the left-hand star in Orion`s Belt. Image: NASA
... carbon/oxygen ratios that are typically four to five times higher than those of normal red giants and show little trace of the light metal oxide bands that are the usual red giant hallmark. They resemble S stars in their relative proportion of heavy and light metals, but contain far more carbon in t ...
... carbon/oxygen ratios that are typically four to five times higher than those of normal red giants and show little trace of the light metal oxide bands that are the usual red giant hallmark. They resemble S stars in their relative proportion of heavy and light metals, but contain far more carbon in t ...
society journal - Auckland Astronomical Society
... nebula and its surrounding companions. Then he has presented it well, leaving some darker area around it to set off the nebula. ...
... nebula and its surrounding companions. Then he has presented it well, leaving some darker area around it to set off the nebula. ...
Whiteq
... density of about 125,000 g/cm3. The densest may be as much as 10,000 times denser than this. The most dense materials on earth are only about 20 g/cm3. This is why the idea was initially regarded with skepticism. These densities would be unexplainable, without knowledge of quantum mechanics, and the ...
... density of about 125,000 g/cm3. The densest may be as much as 10,000 times denser than this. The most dense materials on earth are only about 20 g/cm3. This is why the idea was initially regarded with skepticism. These densities would be unexplainable, without knowledge of quantum mechanics, and the ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.