Stellar Remnants - Sierra College Astronomy Home Page
... White Dwarfs in Binary Systems An Alternate End-Game for White Dwarfs A close binary system of a white dwarf and a newly formed red giant will result in the formation of an accretion disk around the white dwarf. Hydrogen build-up on the white dwarf can ignite an explosive fusion reaction blowing ...
... White Dwarfs in Binary Systems An Alternate End-Game for White Dwarfs A close binary system of a white dwarf and a newly formed red giant will result in the formation of an accretion disk around the white dwarf. Hydrogen build-up on the white dwarf can ignite an explosive fusion reaction blowing ...
Galaxies - Mike Brotherton
... Galaxies with extremely violent energy release in their nuclei (pl. of nucleus). “active galactic nuclei” (= AGN) Up to many thousand times more luminous than the entire Milky Way; energy released within a region approx. the size of our solar system! ...
... Galaxies with extremely violent energy release in their nuclei (pl. of nucleus). “active galactic nuclei” (= AGN) Up to many thousand times more luminous than the entire Milky Way; energy released within a region approx. the size of our solar system! ...
The Sculptor dwarf irregular galaxy SDIG: present and past
... indicating that the galaxy is now in a relatively quiescent state. However, the ratio of the H I mass to blue luminosity is typical of other late-type galaxies, suggesting that SDIG has faded by less than a magnitude in B since it stopped forming stars. Highly luminous red stars have been discovered ...
... indicating that the galaxy is now in a relatively quiescent state. However, the ratio of the H I mass to blue luminosity is typical of other late-type galaxies, suggesting that SDIG has faded by less than a magnitude in B since it stopped forming stars. Highly luminous red stars have been discovered ...
Powerpoint Presentation (large file)
... observed in a supernova • Explosive helium fusion may occur in the surface layer of a companion neutron star • This produces a sudden increase in X-ray radiation, which we call a burster ...
... observed in a supernova • Explosive helium fusion may occur in the surface layer of a companion neutron star • This produces a sudden increase in X-ray radiation, which we call a burster ...
The masses of stars
... Thus most easily measured quantities of a star’s brightness at different colours enable us to characterise it in terms of its surface temperature (T) and luminosity (L), which are related to one another through the radius of the star. If we want to understand more about the differences between star ...
... Thus most easily measured quantities of a star’s brightness at different colours enable us to characterise it in terms of its surface temperature (T) and luminosity (L), which are related to one another through the radius of the star. If we want to understand more about the differences between star ...
Chasing the Pole — Howard L. Cohen
... Hubble Space Telescope finally imaged this third star a few years ago (Hupp et al. 2006). Interestingly, all three stars in this triple system have similar principle spectral classes (Type F) showing they are all slightly hotter than the Sun. Polaris, however, is a supergiant or bright giant star, a ...
... Hubble Space Telescope finally imaged this third star a few years ago (Hupp et al. 2006). Interestingly, all three stars in this triple system have similar principle spectral classes (Type F) showing they are all slightly hotter than the Sun. Polaris, however, is a supergiant or bright giant star, a ...
ES Chapter 30
... – A binary star is two stars that are gravitationally bound together and that orbit a common center of mass. – More than half of the stars in the sky are either binary stars or members of multiple-star systems. – Astronomers are able to identify binary stars through ...
... – A binary star is two stars that are gravitationally bound together and that orbit a common center of mass. – More than half of the stars in the sky are either binary stars or members of multiple-star systems. – Astronomers are able to identify binary stars through ...
Document
... Right Ascension: (RA) is measured in angular units of hours, minutes and seconds and increases in the eastward direction. Zero right ascension is usually chosen to be the position of the Sun in the sky at the instant of the vernal equinox. Declination: (dec) is measured in degrees north or south of ...
... Right Ascension: (RA) is measured in angular units of hours, minutes and seconds and increases in the eastward direction. Zero right ascension is usually chosen to be the position of the Sun in the sky at the instant of the vernal equinox. Declination: (dec) is measured in degrees north or south of ...
Jeopardy
... True or False: Even the smallest amount of dust makes it hard for astronomers see light from distant stars? ...
... True or False: Even the smallest amount of dust makes it hard for astronomers see light from distant stars? ...
The Sun
... – A binary star is two stars that are gravitationally bound together and that orbit a common center of mass. – More than half of the stars in the sky are either binary stars or members of multiple-star systems. – Astronomers are able to identify binary stars through ...
... – A binary star is two stars that are gravitationally bound together and that orbit a common center of mass. – More than half of the stars in the sky are either binary stars or members of multiple-star systems. – Astronomers are able to identify binary stars through ...
Science East Meteor Radiant Worksheet finished
... Meteors: Pieces of this dust or debris that enter the atmosphere and burns up. These are also known as ‘shooting stars’ or ‘falling stars’. Most burn up and never land at the surface. Fireball: Is simply a very bright meteor, generated by a larger chunk or rock. Fireballs can make it to the ground, ...
... Meteors: Pieces of this dust or debris that enter the atmosphere and burns up. These are also known as ‘shooting stars’ or ‘falling stars’. Most burn up and never land at the surface. Fireball: Is simply a very bright meteor, generated by a larger chunk or rock. Fireballs can make it to the ground, ...
hst/stis spectroscopy of the environment in the starburst core of m82
... PDR hot-spots in the Lord et al. (1996) ISM model. The cluster M82-A1 (shown as a white plus-sign) is located at the end of an x2-orbit with the maximum redshift observed. Clump C shows the highest blueshift indicating that it is located at the opposite end of the bar, whereas regions D and E must b ...
... PDR hot-spots in the Lord et al. (1996) ISM model. The cluster M82-A1 (shown as a white plus-sign) is located at the end of an x2-orbit with the maximum redshift observed. Clump C shows the highest blueshift indicating that it is located at the opposite end of the bar, whereas regions D and E must b ...
Fixed Stars - Mark Dodich
... larger world view. It is the concept of bringing forward development not just for the self, but for the many. Ptolemy suggests that the brightest star in Orion has a Jupiter/Saturn nature. Rigel is the educator. U: Sirius - Nature: Jup/Mar, Esoterically "The Brilliant Star of Sensitivity", governing ...
... larger world view. It is the concept of bringing forward development not just for the self, but for the many. Ptolemy suggests that the brightest star in Orion has a Jupiter/Saturn nature. Rigel is the educator. U: Sirius - Nature: Jup/Mar, Esoterically "The Brilliant Star of Sensitivity", governing ...
white dwarfs, neutron stars, black hole
... collected into a giant ball that, at the center of the ball, the temperature (from all the gas and dust bumping into each other under the great pressure of the surrounding material) reaches 15 million degrees or so. A wondrous event occurs, nuclear fusion begins and the ball of gas and dust starts t ...
... collected into a giant ball that, at the center of the ball, the temperature (from all the gas and dust bumping into each other under the great pressure of the surrounding material) reaches 15 million degrees or so. A wondrous event occurs, nuclear fusion begins and the ball of gas and dust starts t ...
The Milky Way and other Galaxies
... Galaxies with extremely violent energy release in their nuclei (pl. of nucleus). “active galactic nuclei” (= AGN) Up to many thousand times more luminous than the entire Milky Way; energy released within a region approx. the size of our solar system! ...
... Galaxies with extremely violent energy release in their nuclei (pl. of nucleus). “active galactic nuclei” (= AGN) Up to many thousand times more luminous than the entire Milky Way; energy released within a region approx. the size of our solar system! ...
Pictures in the Sky Teacher`s Guide
... We examine numerous sky related objects and decide together when these things can be seen: during the day, the night, or both. Objects examined may include: clouds, the Sun, planets, rain, rainbow, lightning, kites, birds, stars, constellations, snow, bats, airplanes, and more. After examining all t ...
... We examine numerous sky related objects and decide together when these things can be seen: during the day, the night, or both. Objects examined may include: clouds, the Sun, planets, rain, rainbow, lightning, kites, birds, stars, constellations, snow, bats, airplanes, and more. After examining all t ...
Stellar Populations of Galaxies- 2 Lectures H
... The shape depends on the metallicity of the stars (Demarque et al 2004) One can determine the 'age' of the system by fitting an isochrone (if one has data for individual stars) or by calculating some average property (color/spectrum) averaging over the isochrone - degeneracy problems with age and me ...
... The shape depends on the metallicity of the stars (Demarque et al 2004) One can determine the 'age' of the system by fitting an isochrone (if one has data for individual stars) or by calculating some average property (color/spectrum) averaging over the isochrone - degeneracy problems with age and me ...
Chapter 10
... These stars are all more luminous than the Sun. Two new categories appear here – the red giants and the blue giants. Clearly, the brightest stars in the sky appear bright because of their enormous luminosities, not their ...
... These stars are all more luminous than the Sun. Two new categories appear here – the red giants and the blue giants. Clearly, the brightest stars in the sky appear bright because of their enormous luminosities, not their ...
10 Astrophysics (Option E)
... Before techniques had been invented for measuring brightness, it was estimated with the naked eye on a scale from 1 to 6. The brightest stars were 1 and the ones that you could only just see were 6. This would be dependent on how good your eyesight was. ...
... Before techniques had been invented for measuring brightness, it was estimated with the naked eye on a scale from 1 to 6. The brightest stars were 1 and the ones that you could only just see were 6. This would be dependent on how good your eyesight was. ...
Lesson 3 - The Life Cycle of Stars - Hitchcock
... • Although black holes are invisible, they can be observed by the gravitational effect they have on their surroundings. • Matter swirls around a black hole just before being pulled in. The matter becomes so hot that it emits X-rays. • Astronomers use X-rays and other means to locate black holes, eve ...
... • Although black holes are invisible, they can be observed by the gravitational effect they have on their surroundings. • Matter swirls around a black hole just before being pulled in. The matter becomes so hot that it emits X-rays. • Astronomers use X-rays and other means to locate black holes, eve ...
What is the life cycle of a star?
... • Although black holes are invisible, they can be observed by the gravitational effect they have on their surroundings. • Matter swirls around a black hole just before being pulled in. The matter becomes so hot that it emits X-rays. • Astronomers use X-rays and other means to locate black holes, eve ...
... • Although black holes are invisible, they can be observed by the gravitational effect they have on their surroundings. • Matter swirls around a black hole just before being pulled in. The matter becomes so hot that it emits X-rays. • Astronomers use X-rays and other means to locate black holes, eve ...
pdf file with complementary illustrations / animations
... For the last 20 years the giant planets known as hot Jupiters have presented astronomers with a puzzle. How did they settle into orbits 100 times closer to their host stars than our own Jupiter is to the Sun? An international team of astronomers has announced this week1 the discovery of a newborn ho ...
... For the last 20 years the giant planets known as hot Jupiters have presented astronomers with a puzzle. How did they settle into orbits 100 times closer to their host stars than our own Jupiter is to the Sun? An international team of astronomers has announced this week1 the discovery of a newborn ho ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.