Powerpoint Presentation (large file)
... are glowing, ionized clouds of gas • Emission nebulae are powered by ultraviolet light that they absorb from nearby hot stars • Reflection nebulae are produced when starlight is reflected from dust grains in the interstellar medium, producing a characteristic bluish ...
... are glowing, ionized clouds of gas • Emission nebulae are powered by ultraviolet light that they absorb from nearby hot stars • Reflection nebulae are produced when starlight is reflected from dust grains in the interstellar medium, producing a characteristic bluish ...
Stellar Evolution
... luminosity, but hotter tends to increase luminosity. The position of the newly forming star on the H-R diagram will move to the left as it heats up but wander up and down somewhat as its size shrinks. This process takes about 50 million years for a star like the sun, but may take a much shorter time ...
... luminosity, but hotter tends to increase luminosity. The position of the newly forming star on the H-R diagram will move to the left as it heats up but wander up and down somewhat as its size shrinks. This process takes about 50 million years for a star like the sun, but may take a much shorter time ...
ASTR-1020: Astronomy II Course Lecture Notes Section III
... Example III–7. We measure the trigonometric parallax of a visual binary star as 0.20 arcsec and measure an angular separation between the pair of stars in this binary as 5 arcsec. Over a few years of observations, we determine the orbital period of this pair to be 30 years. What is the combined mass ...
... Example III–7. We measure the trigonometric parallax of a visual binary star as 0.20 arcsec and measure an angular separation between the pair of stars in this binary as 5 arcsec. Over a few years of observations, we determine the orbital period of this pair to be 30 years. What is the combined mass ...
The Stars
... • Most stars are on the main sequence. – Stars spend most of their life on the main sequence – Most stars are faint and red • Giants and supergiants are visible from great distances. – Giants and supergiants are rare. ...
... • Most stars are on the main sequence. – Stars spend most of their life on the main sequence – Most stars are faint and red • Giants and supergiants are visible from great distances. – Giants and supergiants are rare. ...
Sample multiple choice questions for Exam 2
... 37. The final stellar remnant of a one solar mass star is a a) white dwarf. b) neutron star. c) pulsar. d) black hole. e) main sequence star. 38. Neutron stars are thought to form from a) 1 Msun stars. b) 5 Msun stars. c) 10 Msun stars. d) 50 Msun stars. e) all stars; mass has nothing to do with it. ...
... 37. The final stellar remnant of a one solar mass star is a a) white dwarf. b) neutron star. c) pulsar. d) black hole. e) main sequence star. 38. Neutron stars are thought to form from a) 1 Msun stars. b) 5 Msun stars. c) 10 Msun stars. d) 50 Msun stars. e) all stars; mass has nothing to do with it. ...
Evolution of Stars and Galaxies
... magnitude Main sequence – group of stars running diagonally across diagram; most stars fit into this band (90%) Hot, blue, bright in upper left Cool, red, dim stars in the lower right ...
... magnitude Main sequence – group of stars running diagonally across diagram; most stars fit into this band (90%) Hot, blue, bright in upper left Cool, red, dim stars in the lower right ...
Star Basics
... 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. ...
HERE
... lifespan,burn-rate, size: Spectral class O, B stars (rare, but very interesting): Giant, hot, bright, blue stars burn up quickly and die violently. Lifetime is only 1-10 million years. Spectral class A,F,G,K stars (like the Sun): Middle of the road habits. Orange, yellow or white in color. Typic ...
... lifespan,burn-rate, size: Spectral class O, B stars (rare, but very interesting): Giant, hot, bright, blue stars burn up quickly and die violently. Lifetime is only 1-10 million years. Spectral class A,F,G,K stars (like the Sun): Middle of the road habits. Orange, yellow or white in color. Typic ...
Some Facts and Hypotheses regard
... definite limits occurring within regular intervals. Others attain a cert;in maximum and then decline to absolute extinction and then again re-appear. Some are continuous in their processes of change. Oth.ers are q?ite irreg~la.l' in their fluctuations. Others have vanable maXIma and minuna. Others h ...
... definite limits occurring within regular intervals. Others attain a cert;in maximum and then decline to absolute extinction and then again re-appear. Some are continuous in their processes of change. Oth.ers are q?ite irreg~la.l' in their fluctuations. Others have vanable maXIma and minuna. Others h ...
Beauty and the beast - University of Wyoming
... will disappear. The outer regions of your eye are good at detecting contrast (but not color), and this allows you to see fainter objects. Many more stars will be seen within the Pleiades with binoculars or a telescope. This open cluster contains over 1,000 stars in a region about 40 light years in d ...
... will disappear. The outer regions of your eye are good at detecting contrast (but not color), and this allows you to see fainter objects. Many more stars will be seen within the Pleiades with binoculars or a telescope. This open cluster contains over 1,000 stars in a region about 40 light years in d ...
PHYSICS 113 Practice Questions #2
... c. whether it is loca ted on the o uter regions o r the central reg ions of the mo lecular cloud that gave it birth d. the speed and direction of its rotation e. the size of the d isk around it 15. Why do all stars spend most of their lives on the main sequence? a. because the neutrinos created insi ...
... c. whether it is loca ted on the o uter regions o r the central reg ions of the mo lecular cloud that gave it birth d. the speed and direction of its rotation e. the size of the d isk around it 15. Why do all stars spend most of their lives on the main sequence? a. because the neutrinos created insi ...
types of stars, luminosity, and brightness
... star is located at a different distance from us. So, some stars APPEAR dimmer, even though they are intrinsically brighter, since they are far away from us, and some stars APPEAR brighter even though they are intrinsically dimmer because they are close to us. So, you would expect a plot like on the ...
... star is located at a different distance from us. So, some stars APPEAR dimmer, even though they are intrinsically brighter, since they are far away from us, and some stars APPEAR brighter even though they are intrinsically dimmer because they are close to us. So, you would expect a plot like on the ...
Proxima
... Centaurus is a Centaur, they are half man-half horse! Centaurus faces east because he defending himself against Lupus the goat another constellation nearby! Centaurus is known as a “myth” constellation. It’s the 9th largest constellation in the sky Proxima is the 3rd star in Centaurus Cont ...
... Centaurus is a Centaur, they are half man-half horse! Centaurus faces east because he defending himself against Lupus the goat another constellation nearby! Centaurus is known as a “myth” constellation. It’s the 9th largest constellation in the sky Proxima is the 3rd star in Centaurus Cont ...
Stellar Evolution - Hays High Indians
... The Life of HUGE Stars • As particles fall to the core they lose kinetic & potential energy and more HEAT results • This heat triggers nuclear fusion in the outer layers, and the resulting explosion is the supernova. • The energy released can fuse iron and other heavier elements, up to uranium. ...
... The Life of HUGE Stars • As particles fall to the core they lose kinetic & potential energy and more HEAT results • This heat triggers nuclear fusion in the outer layers, and the resulting explosion is the supernova. • The energy released can fuse iron and other heavier elements, up to uranium. ...
Lecture notes -- pdf file - University of Iowa Astrophysics
... in 1838 (Friedrich Bessel) • Closest star is Alpha Centauri, p=0.75 arcseconds, d=1.33 parsecs= 4.35 light years • Nearest stars are a few to many parsecs, 5 - 20 light years ...
... in 1838 (Friedrich Bessel) • Closest star is Alpha Centauri, p=0.75 arcseconds, d=1.33 parsecs= 4.35 light years • Nearest stars are a few to many parsecs, 5 - 20 light years ...
Auriga (constellation)
Auriga is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy and remains one of the 88 modern constellations. Located north of the celestial equator, its name is the Latin word for ""charioteer"", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent during winter evenings in the Northern Hemisphere, along with the five other constellations that have stars in the Winter Hexagon asterism. Because of its northern declination, Auriga is only visible in its entirety as far as 34° south; for observers farther south it lies partially or fully below the horizon. A large constellation, with an area of 657 square degrees, it is half the size of the largest constellation, Hydra.Its brightest star, Capella, is an unusual multiple star system among the brightest stars in the night sky. Beta Aurigae is an interesting variable star in the constellation; Epsilon Aurigae, a nearby eclipsing binary with an unusually long period, has been studied intensively. Because of its position near the winter Milky Way, Auriga has many bright open clusters in its borders, including M36, M37, and M38, popular targets for amateur astronomers. In addition, it has one prominent nebula, the Flaming Star Nebula, associated with the variable star AE Aurigae.In Chinese mythology, Auriga's stars were incorporated into several constellations, including the celestial emperors' chariots, made up of the modern constellation's brightest stars. Auriga is home to the radiant for the Aurigids, Zeta Aurigids, Delta Aurigids, and the hypothesized Iota Aurigids.