User`s Guide to the Sky Notes
... In 1928, the International Astronomical Union (IAU) officially established 88 constellations, each with its own stars and section of the sky (region of view). In addition to the constellations, there are also asterisms, for example: the Big Dipper, which is part of the constellation Ursa Major. Aste ...
... In 1928, the International Astronomical Union (IAU) officially established 88 constellations, each with its own stars and section of the sky (region of view). In addition to the constellations, there are also asterisms, for example: the Big Dipper, which is part of the constellation Ursa Major. Aste ...
AST101_lect_12
... to refill the gas tank in your car. Time remaining is the amount of fuel you have (the size of the tank) by your average usage (gallons per day). ...
... to refill the gas tank in your car. Time remaining is the amount of fuel you have (the size of the tank) by your average usage (gallons per day). ...
Vampy Astronomy Syllabus
... Observation Expectations: We will have late night observations at off-campus settings. Here a few expectations for those trips: 1. You are expected to leave the site as you found it. Any trash must be picked up and disposed of properly. 2. You are expected NEVER to shine a light in anyone’s eyes. On ...
... Observation Expectations: We will have late night observations at off-campus settings. Here a few expectations for those trips: 1. You are expected to leave the site as you found it. Any trash must be picked up and disposed of properly. 2. You are expected NEVER to shine a light in anyone’s eyes. On ...
Announcements - Lick Observatory
... • Fusing light elements together results in more nuclear binding energy and less mass per nucleon. When the mass disappears, it is converted to energy so light-element fusion produces energy. • But, when fusing any element to Fe, you now need to PROVIDE some energy to be converted into mass and Natu ...
... • Fusing light elements together results in more nuclear binding energy and less mass per nucleon. When the mass disappears, it is converted to energy so light-element fusion produces energy. • But, when fusing any element to Fe, you now need to PROVIDE some energy to be converted into mass and Natu ...
Elements from Stardust
... With the high pressure and hot temperature in the sun, nuclei of atoms are squeezed together and they collide. Nuclear fusion combines smaller nuclei into larger nuclei—making bigger and heavier atoms. ...
... With the high pressure and hot temperature in the sun, nuclei of atoms are squeezed together and they collide. Nuclear fusion combines smaller nuclei into larger nuclei—making bigger and heavier atoms. ...
Stellar Populations of Galaxies- 2 Lectures H
... • For actively star-forming galaxies, the 4000A break(Balogh etal.1999) and Balmer absorption line features, such as the Hδ index, provide important information about stellar age and recent star formation ...
... • For actively star-forming galaxies, the 4000A break(Balogh etal.1999) and Balmer absorption line features, such as the Hδ index, provide important information about stellar age and recent star formation ...
Evidence of the Big Bang and Structure of the Universe
... spiral The Milky Way galaxy is a spiral galaxy, which has over 200 billion stars ...
... spiral The Milky Way galaxy is a spiral galaxy, which has over 200 billion stars ...
After Dark M S
... What are cosmic rays and how were they discovered? How can particles of light with trillions of times the energy of the light particles from the sun be used to do astronomy and learn about the sources of cosmic rays? HAWC, a cosmic ray observatory currently under construction, will detect and measur ...
... What are cosmic rays and how were they discovered? How can particles of light with trillions of times the energy of the light particles from the sun be used to do astronomy and learn about the sources of cosmic rays? HAWC, a cosmic ray observatory currently under construction, will detect and measur ...
Where Do Baby Stars Come From?
... Fraser Cain: Most parents have had that uncomfortable conversation with their children at some point. Mommy, Daddy, where do stars come from? You hem and haw, mumble a few words about angular momentum and primordial hydrogen and then cleverly change the subject. Well, you don't have to avoid the sub ...
... Fraser Cain: Most parents have had that uncomfortable conversation with their children at some point. Mommy, Daddy, where do stars come from? You hem and haw, mumble a few words about angular momentum and primordial hydrogen and then cleverly change the subject. Well, you don't have to avoid the sub ...
Lecture 33
... • It was all over in less than an hour, as T dropped from 3 billion to <300 million degrees • It stopped essentially because all the neutrons got used up, essentially all moving into helium-4 nuclei • A tiny amount of Li and Be were created too...nothing heavier ...
... • It was all over in less than an hour, as T dropped from 3 billion to <300 million degrees • It stopped essentially because all the neutrons got used up, essentially all moving into helium-4 nuclei • A tiny amount of Li and Be were created too...nothing heavier ...
2.3 Peculiar galaxies
... Black hole accretion discs. If the available gas simply fell radially downwards towards the black hole, the energy it would gain would be kinetic energy, and it wouldn’t give much radiation; it would just disappear down the black hole. However, if, as is very likely, the gas is rotating around the b ...
... Black hole accretion discs. If the available gas simply fell radially downwards towards the black hole, the energy it would gain would be kinetic energy, and it wouldn’t give much radiation; it would just disappear down the black hole. However, if, as is very likely, the gas is rotating around the b ...
ASTR 1050: Survey of Astronomy
... a. operates at a slightly lower temperature than the proton-proton chain. b. is most efficient in stars less massive than the sun. c. occurs when carbon and oxygen combine to form nitrogen, which produces energy. d. produces the energy responsible for bipolar outflows (e.g., in Herbig-Haro objects). ...
... a. operates at a slightly lower temperature than the proton-proton chain. b. is most efficient in stars less massive than the sun. c. occurs when carbon and oxygen combine to form nitrogen, which produces energy. d. produces the energy responsible for bipolar outflows (e.g., in Herbig-Haro objects). ...
Supplementary Information
... angle of the major axis (24 west of north) by searching for the largest amplitude in mean velocity along slits passing through the nominal continuum centre position. We then varied inclination, total mass, radial and z-scale lengths to reach minimum 2 with respect to the observed one dimensional ...
... angle of the major axis (24 west of north) by searching for the largest amplitude in mean velocity along slits passing through the nominal continuum centre position. We then varied inclination, total mass, radial and z-scale lengths to reach minimum 2 with respect to the observed one dimensional ...
Lecture 16: Iron Core Collapse, Neutron Stars
... • During this phase the neutron star radiates away its binding energy, approximately ~3 x 1053 erg, as neutrinos (of all flavors). Brighter than the rest of the universe combined!! ...
... • During this phase the neutron star radiates away its binding energy, approximately ~3 x 1053 erg, as neutrinos (of all flavors). Brighter than the rest of the universe combined!! ...
18.3 NOTES What is magnitude? Objective: Compare apparent
... Without a telescope, you can see about 2000 stars in the night sky. Some appear brighter than others. One way to measure a star’s brightness is by magnitude. The brightness of a star depends on its temperature, size, and distance from Earth. A hot star is usually brighter than a cool star. A large s ...
... Without a telescope, you can see about 2000 stars in the night sky. Some appear brighter than others. One way to measure a star’s brightness is by magnitude. The brightness of a star depends on its temperature, size, and distance from Earth. A hot star is usually brighter than a cool star. A large s ...
gravPart2
... of N-particles of different masses – Relaxation cause energy diffusion from core to envelope of a system, – expansion of the system, – evaporation (~escape) of stars ...
... of N-particles of different masses – Relaxation cause energy diffusion from core to envelope of a system, – expansion of the system, – evaporation (~escape) of stars ...
main characteristics of the emission from elliptical galaxies
... primarly due to a halo of extremely hot gas in which ellipticals seem to be embedded. After a brief classi cation, the two main processes linked to these phenomena will be described, together with the informations we can collect thanks to them. Eventually, we will take a quick look at the other regi ...
... primarly due to a halo of extremely hot gas in which ellipticals seem to be embedded. After a brief classi cation, the two main processes linked to these phenomena will be described, together with the informations we can collect thanks to them. Eventually, we will take a quick look at the other regi ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.