Astro-MilkyWay
... A Black Hole at the Center of Our Galaxy By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to ~ 2.6 million solar masses ...
... A Black Hole at the Center of Our Galaxy By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to ~ 2.6 million solar masses ...
astrocoursespring2012lec5-1-1
... appear smaller and fainter. When a telescope probes about 5 billion light years into look-back time, it can detect only the brightest galaxies, giant, elliptical galaxies – because spiral galaxies similar to the Milky Way are too dim to be seen at that distance ...
... appear smaller and fainter. When a telescope probes about 5 billion light years into look-back time, it can detect only the brightest galaxies, giant, elliptical galaxies – because spiral galaxies similar to the Milky Way are too dim to be seen at that distance ...
Stars: Their Life and Afterlife
... Part 1. Evolution of Massive Stars We saw last week that stars in the mass range ~ 0.4 – 4 MŸ at formation (when they join the main sequence) form carbon-oxygen cores that are supported against gravity by degenerate-electron pressure. They do not have enough mass for gravity to overcome this pressur ...
... Part 1. Evolution of Massive Stars We saw last week that stars in the mass range ~ 0.4 – 4 MŸ at formation (when they join the main sequence) form carbon-oxygen cores that are supported against gravity by degenerate-electron pressure. They do not have enough mass for gravity to overcome this pressur ...
Stellar Spectroscopy (GA 3.0) - National Optical Astronomy
... Spectroscopy is the study of “what kinds” of light we see from an object. It is a measure of the quantity of each color of light (or more specifically, the amount of each wavelength of light). It is a powerful tool in astronomy. In fact, most of what we know in astronomy is a result of spectroscopy: ...
... Spectroscopy is the study of “what kinds” of light we see from an object. It is a measure of the quantity of each color of light (or more specifically, the amount of each wavelength of light). It is a powerful tool in astronomy. In fact, most of what we know in astronomy is a result of spectroscopy: ...
Fundamentals of Atmospheric Chemistry and Astrochemistry
... chemistry of the universe. Instead, all of the information we have comes from passive observations. The data from telescopes arrives in the form of spectroscopic signatures recorded in various portions of the electromagnetic spectrum (UV‐vis, infrared, microwave etc) for different ...
... chemistry of the universe. Instead, all of the information we have comes from passive observations. The data from telescopes arrives in the form of spectroscopic signatures recorded in various portions of the electromagnetic spectrum (UV‐vis, infrared, microwave etc) for different ...
HR Diagram - TeacherWeb
... 5. Describe: More than 90 percent of all stars in the universe, including the Sun, are main sequence stars. As main sequence stars age, they move up and to the right on the H-R diagram and become giants or supergiants. What are the characteristics of giants and supergiants? _________________________ ...
... 5. Describe: More than 90 percent of all stars in the universe, including the Sun, are main sequence stars. As main sequence stars age, they move up and to the right on the H-R diagram and become giants or supergiants. What are the characteristics of giants and supergiants? _________________________ ...
F p = Fraction of good stars with planets
... brilliant light. The center of the fire looked like glowing metal, 5 and in the fire was what looked like four living creatures. In appearance their form was human, 6 but each of them had four faces and four wings. 7 Their legs were straight; their feet were like those of a calf and gleamed like bur ...
... brilliant light. The center of the fire looked like glowing metal, 5 and in the fire was what looked like four living creatures. In appearance their form was human, 6 but each of them had four faces and four wings. 7 Their legs were straight; their feet were like those of a calf and gleamed like bur ...
Stars with T eff
... mostly relied on the Reimers’s (1975) formula, and it is widely used as a LAW” (Catelan 2005) ...
... mostly relied on the Reimers’s (1975) formula, and it is widely used as a LAW” (Catelan 2005) ...
γ The potential for intensity interferometry with -ray telescope arrays
... mv of a CTA concept is illustrated in the right panel of Fig. 1. Targets are limited to a mv ≈ 8.5m for a S/N = 5, and a 5 hours integration in case of 50% visibility (see Le Bohec et al., these proceedings). These specifications allow important interferometric studies regarding binary stars, stella ...
... mv of a CTA concept is illustrated in the right panel of Fig. 1. Targets are limited to a mv ≈ 8.5m for a S/N = 5, and a 5 hours integration in case of 50% visibility (see Le Bohec et al., these proceedings). These specifications allow important interferometric studies regarding binary stars, stella ...
stellar interiors instructor notes
... since it is not possible to see into space from the planet’s surface. Yet, one can construct abstract mathematical models of massive spheres of hot gas in equilibrium and deduce their properties from what is known about the physics of matter. Would it come as a surprise to scientists on such a plane ...
... since it is not possible to see into space from the planet’s surface. Yet, one can construct abstract mathematical models of massive spheres of hot gas in equilibrium and deduce their properties from what is known about the physics of matter. Would it come as a surprise to scientists on such a plane ...
Slides from the second lecture
... – This generally requires detailed computer programs that only became feasible to run in the mid-60s (though most of the ...
... – This generally requires detailed computer programs that only became feasible to run in the mid-60s (though most of the ...
High School Science Essential Curriculum - Astronomy
... the Hertzsprung-Russell diagram, including protostars, main sequence stars, giant and supergiants, nova and supernova stars, variable stars, white dwarfs, neutron stars/pulsars, and black holes. c. Differentiate various multiple star systems, including binary stars, globular clusters, and open clust ...
... the Hertzsprung-Russell diagram, including protostars, main sequence stars, giant and supergiants, nova and supernova stars, variable stars, white dwarfs, neutron stars/pulsars, and black holes. c. Differentiate various multiple star systems, including binary stars, globular clusters, and open clust ...
Goals of the day Clickers Order of Magnitude Astronomy
... • The solar system is light-hours in size • The Local group is millions of light-years in size ...
... • The solar system is light-hours in size • The Local group is millions of light-years in size ...
Hot-plate model of stars March 14 − Observed properties of stars
... • For nearby stars, use method of parallax. (Read about parallax in 11.1) ...
... • For nearby stars, use method of parallax. (Read about parallax in 11.1) ...
Astronomy Directed Reading
... _____ 74. Why does matching the spectral lines of starlight to those of Earth’s elements enable scientists to identify the elements in a star’s atmosphere? a. Groups of elements have the same spectral lines. b. Individual elements may have the same spectral lines. c. Each element has a unique patte ...
... _____ 74. Why does matching the spectral lines of starlight to those of Earth’s elements enable scientists to identify the elements in a star’s atmosphere? a. Groups of elements have the same spectral lines. b. Individual elements may have the same spectral lines. c. Each element has a unique patte ...
Astronomy and Space articles
... The Brightest Star in the Night Sky Since writing recently about the first star to become visible in the evenings, which at this time of the year is Sirius, I have had a few questions about that star, and why it is so bright. Sirius is a brilliant star, visible high in our northern evening sky. It i ...
... The Brightest Star in the Night Sky Since writing recently about the first star to become visible in the evenings, which at this time of the year is Sirius, I have had a few questions about that star, and why it is so bright. Sirius is a brilliant star, visible high in our northern evening sky. It i ...
What YOU can do! - Bangalore Astronomical Society
... Scientific Contributions by hobby astronomers ...
... Scientific Contributions by hobby astronomers ...
The Hot-plate Model of a Star Model of Stars— 29 Sep •
... At greater distances from star, light is spread over larger area. Flux is lower. ...
... At greater distances from star, light is spread over larger area. Flux is lower. ...
Student Exploration Sheet: Growing Plants
... Betelgeuse, Sirius B, Spica, the Sun, and Vega. Drag the six stars to position them where you think they would fit on the Gizmo’s color scale. Click Sort stars on the Gizmo to check your placements. Mark the location of each star on the scale below. Use abbreviations for the star names. For example, ...
... Betelgeuse, Sirius B, Spica, the Sun, and Vega. Drag the six stars to position them where you think they would fit on the Gizmo’s color scale. Click Sort stars on the Gizmo to check your placements. Mark the location of each star on the scale below. Use abbreviations for the star names. For example, ...
Basics about stars
... the pull of gravity. The Chandrasekhar limit prohibits WD‘s more massive than 1.44M • Neutron stars : Stars with initially up to 25M end their life as Neutron stars. A supernova Type II is associated with the formation of a neutron star • Black hole : For more massive stars even the neutron degene ...
... the pull of gravity. The Chandrasekhar limit prohibits WD‘s more massive than 1.44M • Neutron stars : Stars with initially up to 25M end their life as Neutron stars. A supernova Type II is associated with the formation of a neutron star • Black hole : For more massive stars even the neutron degene ...
EF Eri: Its White Dwarf Primary and L Dwarf Secondary
... --> Polar or AM Herculis type. These contain no accretion disk. ...
... --> Polar or AM Herculis type. These contain no accretion disk. ...
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.