Jeff Christopher
... we soon found that their variations we not completely set in stone, so it was better to stick with one variable star and image it all night, this would give us the best light curve. I was using our biggest telescope, which was to be the best for photometry; the only problem was that the computer con ...
... we soon found that their variations we not completely set in stone, so it was better to stick with one variable star and image it all night, this would give us the best light curve. I was using our biggest telescope, which was to be the best for photometry; the only problem was that the computer con ...
Lec8_2D
... nuclear collisions. More fusion would occur, and more energy would be produced. This explains the main sequence! • Fusion only occurs in the core, where the temperature and density are greatest. The rest of the star just sits there. ...
... nuclear collisions. More fusion would occur, and more energy would be produced. This explains the main sequence! • Fusion only occurs in the core, where the temperature and density are greatest. The rest of the star just sits there. ...
Stellar Evolution
... • As the helium core grows, it compresses. Helium doesn’t fuse to heavier elements for two reasons. (1) with 2 p+ per nucleus, the electric repulsion force is higher than was the case for H-fusion. This means that helium fusion requires a higher temperature than hydrogen fusion -- 100 million K (2) ...
... • As the helium core grows, it compresses. Helium doesn’t fuse to heavier elements for two reasons. (1) with 2 p+ per nucleus, the electric repulsion force is higher than was the case for H-fusion. This means that helium fusion requires a higher temperature than hydrogen fusion -- 100 million K (2) ...
parallax in arc seconds
... A star greater than 10 pc will have an absolute brightness greater than its apparent brightness. ...
... A star greater than 10 pc will have an absolute brightness greater than its apparent brightness. ...
galaxy_physics
... Disks are rotationally supported (dynamically cold) Bulges are dispersion supported (dynamically hot) Two extremes along a continuum ...
... Disks are rotationally supported (dynamically cold) Bulges are dispersion supported (dynamically hot) Two extremes along a continuum ...
lecture22
... elements (elements lighter than iron) during their lives. Elements heavier than iron are generated only in the deaths of high mass stars (supernovae). We were all once fuel for a stellar furnace. Parts of us were formed in a supernova. ...
... elements (elements lighter than iron) during their lives. Elements heavier than iron are generated only in the deaths of high mass stars (supernovae). We were all once fuel for a stellar furnace. Parts of us were formed in a supernova. ...
Three Media Reports by Carole Gallagher
... I found this article to be complimentary to the environmental science that we have been studying in our textbook, Living in the Environment. All semester, we have been learning how the perfectly balanced chemical, biological and physical systems on the earth work to sustain life and how man needs to ...
... I found this article to be complimentary to the environmental science that we have been studying in our textbook, Living in the Environment. All semester, we have been learning how the perfectly balanced chemical, biological and physical systems on the earth work to sustain life and how man needs to ...
Lecture17
... ✪ B) They have the same luminosity. C) They have the same spectral class. D) They have the same surface area. E) None the above. ...
... ✪ B) They have the same luminosity. C) They have the same spectral class. D) They have the same surface area. E) None the above. ...
ULTRASAT in a nutshell (Feb 2017)
... Nonradial hot pulsators, e.g., α Cyg, δ Scuti, SX Phe, β Cep etc. types ...
... Nonradial hot pulsators, e.g., α Cyg, δ Scuti, SX Phe, β Cep etc. types ...
Slide 1
... These stars are all more luminous than the Sun. Two new categories appear here – the red giants and the blue giants. Clearly, the brightest stars in the sky appear bright because of their enormous luminosities, not their ...
... These stars are all more luminous than the Sun. Two new categories appear here – the red giants and the blue giants. Clearly, the brightest stars in the sky appear bright because of their enormous luminosities, not their ...
pals_20160211_howpla.. - Department of Physics and Astronomy
... “Drag” from proto-planetary nebula gas? Gravitational interactions with each other? We think that Uranus & Neptune formed closer to Sun, were flung to their present orbits by interactions with Jupiter, maybe Saturn ...
... “Drag” from proto-planetary nebula gas? Gravitational interactions with each other? We think that Uranus & Neptune formed closer to Sun, were flung to their present orbits by interactions with Jupiter, maybe Saturn ...
Can Earth-Type Habitable Planets Exist Around 47 UMa?
... carbon is related to the tectonic activities and to the present continental area as a snapshot of the Earth's evolution. Such models are called geostatic models (GSM). On the other hand, on geological time-scales the deeper parts of the Earth are considerable sinks and sources for carbon. In additio ...
... carbon is related to the tectonic activities and to the present continental area as a snapshot of the Earth's evolution. Such models are called geostatic models (GSM). On the other hand, on geological time-scales the deeper parts of the Earth are considerable sinks and sources for carbon. In additio ...
Characteristics of Stars
... Key Concept: Characteristics used to classify stars include color, temperature, size, composition, and brightness. • A star’s color gives clues about the star’s temperature. The coolest stars appear red. The hottest stars appear blue. • Very large stars are called giant stars or supergiant stars. Ou ...
... Key Concept: Characteristics used to classify stars include color, temperature, size, composition, and brightness. • A star’s color gives clues about the star’s temperature. The coolest stars appear red. The hottest stars appear blue. • Very large stars are called giant stars or supergiant stars. Ou ...
TAP 702- 6: Binary stars - Teaching Advanced Physics
... Find the wavelength shift that an astronomer (on Earth) would observe in a spectral line of wavelength 589.0 nm from either star when it is in the position C on the diagram. Is this a red shift or a blue shift? ...
... Find the wavelength shift that an astronomer (on Earth) would observe in a spectral line of wavelength 589.0 nm from either star when it is in the position C on the diagram. Is this a red shift or a blue shift? ...
here - Lund Observatory
... A G5 star has the apparent visual magnitude V = 9.85 and the colour index B-V = 1.15. Determine if the star is a supergiant, a giant or a main-sequence star (dwarf). The visual extinction is three times the colour excess B-V. In thr direction of the star the visual extinction, AV, can be assumed to ...
... A G5 star has the apparent visual magnitude V = 9.85 and the colour index B-V = 1.15. Determine if the star is a supergiant, a giant or a main-sequence star (dwarf). The visual extinction is three times the colour excess B-V. In thr direction of the star the visual extinction, AV, can be assumed to ...
Stars are made of very hot gas. This gas is mostly hydrogen and
... many sizes and colors. Some stars even orbit around each other. We call these binary stars ...
... many sizes and colors. Some stars even orbit around each other. We call these binary stars ...
GIZMO H-RDiagramSE
... Gizmo Warm-up In the early 1900s, astronomers were able to identify many star characteristics such as color, size, temperature, and luminosity—or how bright a star is. However, astronomers did not yet understand exactly how these characteristics were related. Using the H-R Diagram Gizmo™, you will d ...
... Gizmo Warm-up In the early 1900s, astronomers were able to identify many star characteristics such as color, size, temperature, and luminosity—or how bright a star is. However, astronomers did not yet understand exactly how these characteristics were related. Using the H-R Diagram Gizmo™, you will d ...
13.14 The Eight Planets
... Saturn, Uranus and Neptune These 4 planets are also known as the Gas Giants. Their atmosphere consists mainly of hydrogen and helium. These planets have soupy surfaces and get more dense as you sink to the middle. It is not possible to land on these planets. Add to your notes information as to why P ...
... Saturn, Uranus and Neptune These 4 planets are also known as the Gas Giants. Their atmosphere consists mainly of hydrogen and helium. These planets have soupy surfaces and get more dense as you sink to the middle. It is not possible to land on these planets. Add to your notes information as to why P ...
The Origin of the Solar System
... A. The Chemical Composition of the Solar Nebula B. The Condensation of Solids C. The Formation of Planetesimals D. The Growth of Protoplanets E. The Jovian Problem F. Explaining the Characteristics of the Solar System G. Clearing the Nebula ...
... A. The Chemical Composition of the Solar Nebula B. The Condensation of Solids C. The Formation of Planetesimals D. The Growth of Protoplanets E. The Jovian Problem F. Explaining the Characteristics of the Solar System G. Clearing the Nebula ...
slides - quantware mips center
... Hot Jupiters: the giant exoplanets with Jovian masses in close-tostar orbits (observed orbital periods are about several days). The problem with hot Jupiters is that the giant planets are formed far from their parent stars, therefore a mechanism of migration is required, delivering the planet to its ...
... Hot Jupiters: the giant exoplanets with Jovian masses in close-tostar orbits (observed orbital periods are about several days). The problem with hot Jupiters is that the giant planets are formed far from their parent stars, therefore a mechanism of migration is required, delivering the planet to its ...