Evolution of a Planetary System
... Is Our Sun Unique? __________________________________________________________________ ...
... Is Our Sun Unique? __________________________________________________________________ ...
3.2 Spectra and Spectral Classification
... → ABC types re-ordered Cannon realized that T is the principal distinguishing feature New system: O – B – A – F – G – K – M – L („Oh Be A Fine Girl Kiss Me“) With fine structure of 10 subclasses: A0,...,A9,B0,....,B9,... Temperature sequence Remark: type L was added only recently ...
... → ABC types re-ordered Cannon realized that T is the principal distinguishing feature New system: O – B – A – F – G – K – M – L („Oh Be A Fine Girl Kiss Me“) With fine structure of 10 subclasses: A0,...,A9,B0,....,B9,... Temperature sequence Remark: type L was added only recently ...
HR Diagram Explorer
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you control the variables plotted on the x-axis: (temperature, B-V, or spectral type) and those plotted on the y-ax ...
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you control the variables plotted on the x-axis: (temperature, B-V, or spectral type) and those plotted on the y-ax ...
Preview Sample 2
... in the spaces between the ancient figures, have Latin names. The names of stars usually come from ancient Arabic, although modern astronomers often refer to a star by its constellation and a Greek letter assigned according to its brightness within the constellation. How can you compare the brightnes ...
... in the spaces between the ancient figures, have Latin names. The names of stars usually come from ancient Arabic, although modern astronomers often refer to a star by its constellation and a Greek letter assigned according to its brightness within the constellation. How can you compare the brightnes ...
printer-friendly version of benchmark
... mass. Stars with greater mass have a greater gravitational attraction – causing the core temperature to be greater, which in turn increases the rate of nuclear fusion and decreases the star’s time on the main sequence. Likewise, lower mass stars have lesser rates of fusion and greater amounts of tim ...
... mass. Stars with greater mass have a greater gravitational attraction – causing the core temperature to be greater, which in turn increases the rate of nuclear fusion and decreases the star’s time on the main sequence. Likewise, lower mass stars have lesser rates of fusion and greater amounts of tim ...
THE PHYSICAL CHARACTERIZATION OF THE STARS 1
... therefore the absolute individual masses can be derived. The double-lined eclipsing binaries are extremely important, since they are the only case providing simultaneous determinations of individual masses and radii (see Sect. 3). The best reached precisions are of the order of 1-5% ([27], [4]). Suc ...
... therefore the absolute individual masses can be derived. The double-lined eclipsing binaries are extremely important, since they are the only case providing simultaneous determinations of individual masses and radii (see Sect. 3). The best reached precisions are of the order of 1-5% ([27], [4]). Suc ...
Physics- HSC- Module 9.7 Astrophysics
... During the late 19th and early 20th centuries, astronomers obtained spectra and parallax distances for many stars, a powerful tool was discovered for classifying and understanding stars. Around 1911-13, Enjar Hertzsprung and Henry Norris Russell independently found that stars could be divided into t ...
... During the late 19th and early 20th centuries, astronomers obtained spectra and parallax distances for many stars, a powerful tool was discovered for classifying and understanding stars. Around 1911-13, Enjar Hertzsprung and Henry Norris Russell independently found that stars could be divided into t ...
observing cards - NC Science Festival
... to spot in dark skies are the Hyades, or head of Taurus the Bull, and the nearby Pleiades, also known as the Seven Sisters. Just follow the line of Orion’s Belt as seen on the right. ...
... to spot in dark skies are the Hyades, or head of Taurus the Bull, and the nearby Pleiades, also known as the Seven Sisters. Just follow the line of Orion’s Belt as seen on the right. ...
Astro-MilkyWay
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
Astronomical units
... very different from that of a blackbody. Still can be useful - e.g. basis of most successful method for finding very distant (high redshift) galaxies: ...
... very different from that of a blackbody. Still can be useful - e.g. basis of most successful method for finding very distant (high redshift) galaxies: ...
Chapter 15
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
Slide 1
... But the solution to this is even more confusing. If we make a graph of how fast stars in the arms move compared to distance, we get line “B”. The fact that all the stars go the same speed explains why the spiral arms don’t twist up, but it doesn’t make sense. According to physics, the speeds should ...
... But the solution to this is even more confusing. If we make a graph of how fast stars in the arms move compared to distance, we get line “B”. The fact that all the stars go the same speed explains why the spiral arms don’t twist up, but it doesn’t make sense. According to physics, the speeds should ...
Killer Skies
... known as the Crab Nebula. The Crab Nebula is called so for its many-legged shape. The ‘legs’ are filaments of gas that are moving away from the site of the explosion at about 1,400 km/s. Comparing the nebula’s radius, 1.35 pc, with its velocity of expansion reveals that the nebula began expanding ni ...
... known as the Crab Nebula. The Crab Nebula is called so for its many-legged shape. The ‘legs’ are filaments of gas that are moving away from the site of the explosion at about 1,400 km/s. Comparing the nebula’s radius, 1.35 pc, with its velocity of expansion reveals that the nebula began expanding ni ...
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, ...
Stellar Evolution
... • all the stars are at about the same distance from the Earth • all the stars formed at about the same time Determining the distance and age to a globular cluster is much easier than trying to find the distances and ages of a million random stars! Laboratories for understanding how stars of differen ...
... • all the stars are at about the same distance from the Earth • all the stars formed at about the same time Determining the distance and age to a globular cluster is much easier than trying to find the distances and ages of a million random stars! Laboratories for understanding how stars of differen ...
A Global Citizen of the Skies
... Figure 1 and 2 show two examples of stellar constellations created during the activity a member of the ‘Natives’ and ‘Explorers’ group, respectively. Already a clear impact of the cultural background of each group can be detected. The ‘Natives’ constellation targets an animal rather than an artifici ...
... Figure 1 and 2 show two examples of stellar constellations created during the activity a member of the ‘Natives’ and ‘Explorers’ group, respectively. Already a clear impact of the cultural background of each group can be detected. The ‘Natives’ constellation targets an animal rather than an artifici ...
16. Magnitude Systems
... (RI by Cousins) – and extended to a system of cheaper glass filters by Bessell • In this system (calibrated by flux measurements of many stars) Vega’s magnitude is close to 0 in every passband: – UVega = 0; BVega = 0; VVega = 0; RVega = 0; IVega = 0 ...
... (RI by Cousins) – and extended to a system of cheaper glass filters by Bessell • In this system (calibrated by flux measurements of many stars) Vega’s magnitude is close to 0 in every passband: – UVega = 0; BVega = 0; VVega = 0; RVega = 0; IVega = 0 ...
SGHS Faulkes ASISTM Star Cluster Photometry
... The colour of a star is due to the temperature of its outer atmosphere. Relatively cool stars are orange or red and hot stars are white or blue. The temperature of a star’s outer layers is determined by how much energy a star is giving out and how far the star’s outer layers are from the centre of t ...
... The colour of a star is due to the temperature of its outer atmosphere. Relatively cool stars are orange or red and hot stars are white or blue. The temperature of a star’s outer layers is determined by how much energy a star is giving out and how far the star’s outer layers are from the centre of t ...
NASA`s Spitzer Images Out-of-This
... unusual appearance, is located in the constellation Draco. It is fairly bright, and appears elongated because it has an edge-on alignment when viewed from Earth. It also has a strong set of dust lanes, visible in this image from NASA's Spitzer Space Telescope as red features. The central lane is so ...
... unusual appearance, is located in the constellation Draco. It is fairly bright, and appears elongated because it has an edge-on alignment when viewed from Earth. It also has a strong set of dust lanes, visible in this image from NASA's Spitzer Space Telescope as red features. The central lane is so ...
Practice Exam for 3 rd Astronomy Exam
... OB Association In the Milky Way Galaxy there are very many Giant Molecular Clouds (GMC). A typical GMC contains most hydrogen and helium gas and microscopic solid particles of ice and rocky material known collectively as “dust”. The typical GMC may be 300 ly in diameter and encompass 300,000 solar m ...
... OB Association In the Milky Way Galaxy there are very many Giant Molecular Clouds (GMC). A typical GMC contains most hydrogen and helium gas and microscopic solid particles of ice and rocky material known collectively as “dust”. The typical GMC may be 300 ly in diameter and encompass 300,000 solar m ...
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.