Astronomers have found two worlds around distant stars with such
... go to Cyclops and the record winds were logged on Storm. But records seldom last, and exoplanetary weather is a young field. Fortunately Spitzer will remain a powerful tool for studying exoplanets even after it runs out of coolant at the end of its primary mission . Expect to hear about hotter, wind ...
... go to Cyclops and the record winds were logged on Storm. But records seldom last, and exoplanetary weather is a young field. Fortunately Spitzer will remain a powerful tool for studying exoplanets even after it runs out of coolant at the end of its primary mission . Expect to hear about hotter, wind ...
Chapter 4
... a. all parts of the star, the stellar surface and the atmosphere, equally. b. only the part of the low-density atmosphere that is between us and the surface of the star. c. the hot, dense, opaque gas of the star's surface. d. the hot, low-density atmosphere of the star emitting light in all directio ...
... a. all parts of the star, the stellar surface and the atmosphere, equally. b. only the part of the low-density atmosphere that is between us and the surface of the star. c. the hot, dense, opaque gas of the star's surface. d. the hot, low-density atmosphere of the star emitting light in all directio ...
The Hertzsprung-Russell Diagram
... Equal Radius Lines In general the hotter the star is the brighter it will be. Thus you would expect stars of the same size but different temperatures to form a diagonal line called an equal radius line. Equal Radius lines can be added to an H-R diagram ...
... Equal Radius Lines In general the hotter the star is the brighter it will be. Thus you would expect stars of the same size but different temperatures to form a diagonal line called an equal radius line. Equal Radius lines can be added to an H-R diagram ...
absolute magnitude
... • Any irregularly shaped cloud of gas and dust • May be bright or dark, depending on temperature • Types: – Emission (bright) Nebulae – Dark Nebulae – Reflection Nebulae ...
... • Any irregularly shaped cloud of gas and dust • May be bright or dark, depending on temperature • Types: – Emission (bright) Nebulae – Dark Nebulae – Reflection Nebulae ...
Testing
... A. Blown out of galaxy B. Still recycling just like now C. Locked into white dwarfs and low-mass stars ...
... A. Blown out of galaxy B. Still recycling just like now C. Locked into white dwarfs and low-mass stars ...
stars-notes
... Composition of Stars, continued • A continuous spectrum shows all of the colors, while an absorption spectrum shows which wavelengths of light are absorbed. • The spectrum of a star is an absorption spectrum because the atmosphere of the star absorbs certain portions of the light produced by the sta ...
... Composition of Stars, continued • A continuous spectrum shows all of the colors, while an absorption spectrum shows which wavelengths of light are absorbed. • The spectrum of a star is an absorption spectrum because the atmosphere of the star absorbs certain portions of the light produced by the sta ...
The Sun and Stars The Sun is a typical star with a mass of about 2
... For the fusion reaction to occur very high temperatures are needed, on the order of 107 K, which are achieved in the core of the star. The sun’s luminosity of L = 3.8 × 1026 Watts is produced by transforming 4.5 × 109 kilograms of mass into energy each second due to the fusion of 600 million metric ...
... For the fusion reaction to occur very high temperatures are needed, on the order of 107 K, which are achieved in the core of the star. The sun’s luminosity of L = 3.8 × 1026 Watts is produced by transforming 4.5 × 109 kilograms of mass into energy each second due to the fusion of 600 million metric ...
public_lector_10
... Dark matter dominates the mass budget of the universe. It is very important for galaxy formation. The Big Bang was 13.7 Gyr ago. We see that galaxies are already forming 0.5 Gyr after the Big Bang. Without dark matter, this could not happen - it would take galaxies much longer to form ...
... Dark matter dominates the mass budget of the universe. It is very important for galaxy formation. The Big Bang was 13.7 Gyr ago. We see that galaxies are already forming 0.5 Gyr after the Big Bang. Without dark matter, this could not happen - it would take galaxies much longer to form ...
The human race has made great strides in the last few centuries
... collapses. Vast amounts of energy are suddenly released as a supernova, mostly from the gravitational collapse. Some of the energy of this Type II Supernova is converted into kinetic energy and goes blasting out into the interstellar medium to form a supernova remnant. The luminosity of a supernova ...
... collapses. Vast amounts of energy are suddenly released as a supernova, mostly from the gravitational collapse. Some of the energy of this Type II Supernova is converted into kinetic energy and goes blasting out into the interstellar medium to form a supernova remnant. The luminosity of a supernova ...
The Celestial E-Sphere
... The first outing for the Celestial E-Sphere was at Astrofest in February 2007. Scores of attendees asked about the program making very admiring comments. Several of followed up since and asked for copies. In all cases where there has been feedback it has been very positive. Some of the lecturers and ...
... The first outing for the Celestial E-Sphere was at Astrofest in February 2007. Scores of attendees asked about the program making very admiring comments. Several of followed up since and asked for copies. In all cases where there has been feedback it has been very positive. Some of the lecturers and ...
here - Lund Observatory
... A star has been observed to have the apparent visual magnitude V. Later observations show that the star in fact is a binary with two identical components. What is apparent visual magnitude of one of these components? ...
... A star has been observed to have the apparent visual magnitude V. Later observations show that the star in fact is a binary with two identical components. What is apparent visual magnitude of one of these components? ...
White Dwarfs
... Globular clusters formed 12-14 billion years ago. Useful info for studying the history of the Milky Way Galaxy. ...
... Globular clusters formed 12-14 billion years ago. Useful info for studying the history of the Milky Way Galaxy. ...
How do stars form as a function of stellar mass
... Authors: Bernadette Rodgers, Greg Doppmann, Nicole van der Bliek, Sandrine Thomas and Claudia Araya Abstract: How do stars form as a function of stellar mass? What are the effects of the immediate circumstellar environment? These are 2 fundamental questions that our study of companions to intermedia ...
... Authors: Bernadette Rodgers, Greg Doppmann, Nicole van der Bliek, Sandrine Thomas and Claudia Araya Abstract: How do stars form as a function of stellar mass? What are the effects of the immediate circumstellar environment? These are 2 fundamental questions that our study of companions to intermedia ...
Death of High Mass Stars
... galaxy (billions of stars) for a few days • Some of the energy creates elements heavier than iron. These elements are distributed to the rest of the galaxy. ...
... galaxy (billions of stars) for a few days • Some of the energy creates elements heavier than iron. These elements are distributed to the rest of the galaxy. ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.