Astronomy Assignment #1
... Massive stars last for such a short time as main sequence stars because the higher central pressures in those stars drive faster fusion rates and created higher luminosities. The higher luminosities “burn” mass faster and the star will then “burn” through its core reserves of hydrogen faster. Low ma ...
... Massive stars last for such a short time as main sequence stars because the higher central pressures in those stars drive faster fusion rates and created higher luminosities. The higher luminosities “burn” mass faster and the star will then “burn” through its core reserves of hydrogen faster. Low ma ...
Distant Stars Lesson Plan
... Watch the “Distant Stars” segment of the “How far away is it” video book Optionally, find Ch Cygni on the Chandra Space Observatory website. Calculate a star’s luminosity using the H-R Diagram Take a short quiz ...
... Watch the “Distant Stars” segment of the “How far away is it” video book Optionally, find Ch Cygni on the Chandra Space Observatory website. Calculate a star’s luminosity using the H-R Diagram Take a short quiz ...
Beyond the Solar System Homework for Geology 8
... 20. A collection or cluster of stars and solar systems such as the Milky Way or Andromeda. 21. This type of nebula is a cloud of glowing gas excited by ultraviolet radiation from hot stars. ...
... 20. A collection or cluster of stars and solar systems such as the Milky Way or Andromeda. 21. This type of nebula is a cloud of glowing gas excited by ultraviolet radiation from hot stars. ...
Spectral Classification
... B stars are extremely luminous and blue. As O and B stars are so powerful, they live for a very short time. They do not stray far from the area in which they were formed as they don't have the time. They therefore tend to cluster together in what we call OB1 associations. and contains all of the con ...
... B stars are extremely luminous and blue. As O and B stars are so powerful, they live for a very short time. They do not stray far from the area in which they were formed as they don't have the time. They therefore tend to cluster together in what we call OB1 associations. and contains all of the con ...
Distances farther out
... violet), A = Extinction, D = Distance of star from earth MKK classification Luminosity (M) directly from spectrum. Hence find D. Eg. 39 Cancri : Class K0 III => Mv = +0.5. & V = 6.4 = m log(D) = 2.2 => 150 pc away But !! Giant stars have spread about average --- , If 39 Cnc is as bright as ...
... violet), A = Extinction, D = Distance of star from earth MKK classification Luminosity (M) directly from spectrum. Hence find D. Eg. 39 Cancri : Class K0 III => Mv = +0.5. & V = 6.4 = m log(D) = 2.2 => 150 pc away But !! Giant stars have spread about average --- , If 39 Cnc is as bright as ...
Summer Triangle (Winter in the south hemisphere) Lyra
... accompany his words. Orpheus is said to have been so grateful for the instrument that he would often seek a high mountain before sunrise, to greet the sun god with his music as he rose in the morning. Orpheus' most renowned tale is one of the greatest Greek myths. The love story began with Orpheus' ...
... accompany his words. Orpheus is said to have been so grateful for the instrument that he would often seek a high mountain before sunrise, to greet the sun god with his music as he rose in the morning. Orpheus' most renowned tale is one of the greatest Greek myths. The love story began with Orpheus' ...
What is an atom?
... The light from a star is usually concentrated in a rather narrow range of wavelengths. The spectrum of a star’s light is approximately a thermal spectrum called a black body spectrum. A perfect black body emitter ...
... The light from a star is usually concentrated in a rather narrow range of wavelengths. The spectrum of a star’s light is approximately a thermal spectrum called a black body spectrum. A perfect black body emitter ...
Star formation jeopardy
... Type G2 star, middle of HR diagram-average size and luminosity, end of life will be white dwarf, only known star to support a planet with life. Why is our star (the sun) frequently referred to as an “average” star? Compare the important physical characteristics of the Sun with the most common types ...
... Type G2 star, middle of HR diagram-average size and luminosity, end of life will be white dwarf, only known star to support a planet with life. Why is our star (the sun) frequently referred to as an “average” star? Compare the important physical characteristics of the Sun with the most common types ...
Gravity Defied From Potato Asteroids to Magnetised Neutron Stars
... a Fermi degenerate phase where the pressure of degenerate electrons balance the gravitational pressure. 1. The Stars The nature of the stars has been questioned and debated over ever since the dawn of human intelligence. Yet, it’s only in the late nineteenth century when the Sun and other stars have ...
... a Fermi degenerate phase where the pressure of degenerate electrons balance the gravitational pressure. 1. The Stars The nature of the stars has been questioned and debated over ever since the dawn of human intelligence. Yet, it’s only in the late nineteenth century when the Sun and other stars have ...
Presentation for perspective graduate students 2006
... not too hot and not too cold, many hydrogen atoms have their electron in the n = 2 orbit: hence strong absorption ...
... not too hot and not too cold, many hydrogen atoms have their electron in the n = 2 orbit: hence strong absorption ...
Astronomy 1 – Winter 2011
... not too hot and not too cold, many hydrogen atoms have their electron in the n = 2 orbit: hence strong absorption ...
... not too hot and not too cold, many hydrogen atoms have their electron in the n = 2 orbit: hence strong absorption ...
Interstellar Astrophysics Summary notes: Part 5
... as bipolar outflows. This material, out-flowing at speeds of ∼100 km s−1 , can collide with ambient ISM gas/dust clouds and produce knots of hot, ionised gas that glow with an emission spectrum. These are known as Herbig-Haro (HH) objects. Fig. 18-14 shows one Herbig-Haro object in Orion. Repeat obs ...
... as bipolar outflows. This material, out-flowing at speeds of ∼100 km s−1 , can collide with ambient ISM gas/dust clouds and produce knots of hot, ionised gas that glow with an emission spectrum. These are known as Herbig-Haro (HH) objects. Fig. 18-14 shows one Herbig-Haro object in Orion. Repeat obs ...
Galaxies and the Universe
... A galaxy that appears to be populated by mostly red stars, likely: A. never had blue stars in the galaxy. B. had blue stars that are not present anymore but were at one time long ago. C. has been around long enough for blue stars to all evolve into the red main sequence stars we see. D. never conta ...
... A galaxy that appears to be populated by mostly red stars, likely: A. never had blue stars in the galaxy. B. had blue stars that are not present anymore but were at one time long ago. C. has been around long enough for blue stars to all evolve into the red main sequence stars we see. D. never conta ...
Star Birth: The Formation of Stars Jonathan Rowles
... Stars are born in dark clouds of gas and dust, at temperatures around 1040 degrees above absolute zero. These dark clouds can be seen against a glowing backdrop of stars. They contain between 5 to 500 solar masses of material. The dark clouds are disturbed by an outside influence and the centre be ...
... Stars are born in dark clouds of gas and dust, at temperatures around 1040 degrees above absolute zero. These dark clouds can be seen against a glowing backdrop of stars. They contain between 5 to 500 solar masses of material. The dark clouds are disturbed by an outside influence and the centre be ...
Astronomy 110 Announcements: 11.1 Properties of Stars
... Spectral types are further broken down to sub-classes by numbers from 0 to 9 (hotter to cooler) Lines in a star’s spectrum correspond to a spectral type that reveals its temperature (Hottest) ...
... Spectral types are further broken down to sub-classes by numbers from 0 to 9 (hotter to cooler) Lines in a star’s spectrum correspond to a spectral type that reveals its temperature (Hottest) ...
Astronomy Webquest Part 1: Life of Stars: Go to http://www.odec.ca
... In the Table of contents on the top-left hand corner, click on STARS and answer these questions. ...
... In the Table of contents on the top-left hand corner, click on STARS and answer these questions. ...
Nobel Prize in Physics for Accelerating Universe
... water similar to the water we find on Earth. • “Similar” means that the fraction of heavy water is same as in our oceans. • Heavy water is D2O instead of H2O, where D is deuterium which has a nucleus with one proton and one neutron. • The comet comes from the Kupier belt (30-50 AU) while most comets ...
... water similar to the water we find on Earth. • “Similar” means that the fraction of heavy water is same as in our oceans. • Heavy water is D2O instead of H2O, where D is deuterium which has a nucleus with one proton and one neutron. • The comet comes from the Kupier belt (30-50 AU) while most comets ...
Galactic Structure
... And also formed stars only a long time ago, so if similar to surviving satellites and would have extended SFH, need to have been accreted a long time (~10Gyr) ago ...
... And also formed stars only a long time ago, so if similar to surviving satellites and would have extended SFH, need to have been accreted a long time (~10Gyr) ago ...
How Stars Evolve
... What would happen to a contracting cloud fragment if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change B. Its mass would increase ...
... What would happen to a contracting cloud fragment if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change B. Its mass would increase ...
Stages 12 to 14
... If a 200 lb (as measured on the earth) person could stand on the surface of a while dwarf, they would ...
... If a 200 lb (as measured on the earth) person could stand on the surface of a while dwarf, they would ...
Final Study Guide
... 4. List and describe the various features observed in and above the photosphere of the sun. 5. Name the various types of surface features on the moon and discuss their nature and origin. 6. Discuss the main differences between the terrestrial planets and the Jovian planets. 7. Describe Jupiter in te ...
... 4. List and describe the various features observed in and above the photosphere of the sun. 5. Name the various types of surface features on the moon and discuss their nature and origin. 6. Discuss the main differences between the terrestrial planets and the Jovian planets. 7. Describe Jupiter in te ...
Solutions
... relative to their size than are stars compared to their size, and thus you’d expect to see galaxy/galaxy collisions far more often than you see star/star collisions. Indeed, if we look out into the Universe, we see quite a number of interacting galaxies; one example is on the title page of your text ...
... relative to their size than are stars compared to their size, and thus you’d expect to see galaxy/galaxy collisions far more often than you see star/star collisions. Indeed, if we look out into the Universe, we see quite a number of interacting galaxies; one example is on the title page of your text ...
Star Life Study Guide
... 1. _____ Relatively cool star that has expanded to more than 700 times as large as our sun. 2. _____ Actual amount of light a star gives off. 3. _____ Star in which only neutrons can exist in its core. 4. _____ Earliest stage of a star’s formation. 5. _____ Amount of a star’s light observed from Ear ...
... 1. _____ Relatively cool star that has expanded to more than 700 times as large as our sun. 2. _____ Actual amount of light a star gives off. 3. _____ Star in which only neutrons can exist in its core. 4. _____ Earliest stage of a star’s formation. 5. _____ Amount of a star’s light observed from Ear ...
Earth Science 25.2A : Stellar Evolution
... percent of it’s life as a hydrogen burning mainsequence star. Once the hydrogen fuel in the star’s core is depleted, it evolves rapidly and dies. However, with the exception of the least massive red stars, a star can delay it’s death by fusing heavier elements and becoming a ...
... percent of it’s life as a hydrogen burning mainsequence star. Once the hydrogen fuel in the star’s core is depleted, it evolves rapidly and dies. However, with the exception of the least massive red stars, a star can delay it’s death by fusing heavier elements and becoming a ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.