Back to basics: naked-eye astronomical observation
... progressive difficulty. It is generally considered harder than other GCSEs, in that for teenagers the background knowledge required often has not been assimilated, and in most schools timetabling will be limited. Hence those capable of following an extra course tend to be a highly motivated and sele ...
... progressive difficulty. It is generally considered harder than other GCSEs, in that for teenagers the background knowledge required often has not been assimilated, and in most schools timetabling will be limited. Hence those capable of following an extra course tend to be a highly motivated and sele ...
Day 15
... brightness as a measure of distance This assumes that all stars have the same luminosity. The double star data was starting to show that was an incorrect assumption ...
... brightness as a measure of distance This assumes that all stars have the same luminosity. The double star data was starting to show that was an incorrect assumption ...
Slide 1
... helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can ionize hydrogen over a volume of space 1000 light years across. ...
... helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can ionize hydrogen over a volume of space 1000 light years across. ...
Reach for the Stars – Div. B
... from the nebula’s extended clouds of gas and dust. Located 22 000 light-years away from the Sun, it is the closest region of this kind known in our galaxy, providing astronomers with a local test bed for studying the intense star formation processes, very common in other galaxies, but hard to observ ...
... from the nebula’s extended clouds of gas and dust. Located 22 000 light-years away from the Sun, it is the closest region of this kind known in our galaxy, providing astronomers with a local test bed for studying the intense star formation processes, very common in other galaxies, but hard to observ ...
Chapter 18 Notes - Valdosta State University
... out the light from the photosphere. It is used to study the chromosphere and corona. The corona is a tenuous, white halo surrounding the Sun that is only visible during a solar eclipse or with the use of a coronagraph. Temperatures approach 1 million K. The particles in the corona have enough energy ...
... out the light from the photosphere. It is used to study the chromosphere and corona. The corona is a tenuous, white halo surrounding the Sun that is only visible during a solar eclipse or with the use of a coronagraph. Temperatures approach 1 million K. The particles in the corona have enough energy ...
1 - Quia
... 24. A cloud of gas and dust from which stars are "born" is a A. nebula B. nova C. spectrum D. radiation 25. Gas and dust in interstellar nebulae can form - (2 points) A. stars B. comets C. meteors D. asteroids 26. Our distance from the sun is about 93 million miles, or 1 -. A. parsec B. astronomical ...
... 24. A cloud of gas and dust from which stars are "born" is a A. nebula B. nova C. spectrum D. radiation 25. Gas and dust in interstellar nebulae can form - (2 points) A. stars B. comets C. meteors D. asteroids 26. Our distance from the sun is about 93 million miles, or 1 -. A. parsec B. astronomical ...
File - greenscapes4you
... M-Sun star has 30 times more H than the Sun, but burns it with a luminosity that is 30,000 times greater. It’s lifetime is 30/30,000 = 1/10,000 as long as the Sun – corresponding to a lifetime of only a few million years. This is a very short time, cosmically speaking. This is one reason why massive ...
... M-Sun star has 30 times more H than the Sun, but burns it with a luminosity that is 30,000 times greater. It’s lifetime is 30/30,000 = 1/10,000 as long as the Sun – corresponding to a lifetime of only a few million years. This is a very short time, cosmically speaking. This is one reason why massive ...
Stellar Evolution Hertzsprung-Russell Diagram Hertzsprung
... some go through nova/supernova stage most become black dwarfs and disappear ...
... some go through nova/supernova stage most become black dwarfs and disappear ...
1” “Sky-Notes” of the Open University Astronomy Club. April 2005
... A small constellation providing an opportunity to develop your “star-hopping” skills. NGC3003 (11.7) and NGC3021 (12.1) form a close pair. Take care when identifying the identity of this pair as NGC3021 has a higher surface brightness. NGC3184 (9.7) although just over the border in neighbouring Ursa ...
... A small constellation providing an opportunity to develop your “star-hopping” skills. NGC3003 (11.7) and NGC3021 (12.1) form a close pair. Take care when identifying the identity of this pair as NGC3021 has a higher surface brightness. NGC3184 (9.7) although just over the border in neighbouring Ursa ...
Chapter 9 “The Family of Stars “
... spectroscopic: only by taking a spectrum can we see there are two stars. Astronomers wait to see how long it takes for spectral lines to return to their starting positions. - c. eclipsing: stars eclipse one another. Astronomers study the light curves from each star. ...
... spectroscopic: only by taking a spectrum can we see there are two stars. Astronomers wait to see how long it takes for spectral lines to return to their starting positions. - c. eclipsing: stars eclipse one another. Astronomers study the light curves from each star. ...
Earth
... A. Scientists use kilometers on Earth to measure distance B. Astronomical Units (AU) measure distances between planets C. Neither are big enough to measure outside of our solar system, scientists use a unit based on the speed of light ...
... A. Scientists use kilometers on Earth to measure distance B. Astronomical Units (AU) measure distances between planets C. Neither are big enough to measure outside of our solar system, scientists use a unit based on the speed of light ...
Linking Asteroids and Meteorites through Reflectance
... • Main sequence stars are “young” stars • If a star is leaving the main sequence, it is at the end of its lifespan of burning hydrogen into helium ...
... • Main sequence stars are “young” stars • If a star is leaving the main sequence, it is at the end of its lifespan of burning hydrogen into helium ...
Review Packet
... 1. What is the proper name of the H-R Diagram A. Heat-Radiance Diagram B. Hertzsprung-Russell Diagram C. That is the proper name D. Horizontal-Redshift Diagram My corrected answer is B, as the H-R Diagram is named for the two astronomers, Hertzsprung and Russell who were its main contributors. Revie ...
... 1. What is the proper name of the H-R Diagram A. Heat-Radiance Diagram B. Hertzsprung-Russell Diagram C. That is the proper name D. Horizontal-Redshift Diagram My corrected answer is B, as the H-R Diagram is named for the two astronomers, Hertzsprung and Russell who were its main contributors. Revie ...
Dec 2017 - What`s Out Tonight?
... Starting from New Moon, the Moon cycles through are several stars closer than these three but they are phases every 29 days, 12 hours, 44 minutes, 3 seconds. too faint to be seen with the naked eye. It is 2,160 miles in diameter and averages 239,000 miles from Earth. A New Moon is not visible in the ...
... Starting from New Moon, the Moon cycles through are several stars closer than these three but they are phases every 29 days, 12 hours, 44 minutes, 3 seconds. too faint to be seen with the naked eye. It is 2,160 miles in diameter and averages 239,000 miles from Earth. A New Moon is not visible in the ...
Contemporary Physics - Department of Physics and Astronomy
... Suppose that you were given the task of determining the three dimensional distribution of stars in our Milky Way, and galaxies in space beyond the Milky Way. Describe how you would do this. Keep in mind that you are observing from a fixed point on a rotating Earth, that except for the nearest stars ...
... Suppose that you were given the task of determining the three dimensional distribution of stars in our Milky Way, and galaxies in space beyond the Milky Way. Describe how you would do this. Keep in mind that you are observing from a fixed point on a rotating Earth, that except for the nearest stars ...
Figures I through VII in Section 1 on the following sheet
... Both Star D and star B appear equally bright in the night sky; which is farther away from the observer (_18_)? How many times farther (_19_)? Of the two light curves in Section 2, which was produced by a cataclysmic variable star (_20_)? Specifically what type of cataclysmic variable (_21_)? Approxi ...
... Both Star D and star B appear equally bright in the night sky; which is farther away from the observer (_18_)? How many times farther (_19_)? Of the two light curves in Section 2, which was produced by a cataclysmic variable star (_20_)? Specifically what type of cataclysmic variable (_21_)? Approxi ...
Stellar Evolution Notes
... 10 billion years. It is already 5 billion years old, meaning it will live another 5 billion years. Luminosity – ...
... 10 billion years. It is already 5 billion years old, meaning it will live another 5 billion years. Luminosity – ...
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.