Galaxies - Indiana University Astronomy
... Using the same website as above, click on “spectrum” for the two galaxies whose distances you measured. The optical spectrum of the galaxy is shown at the top of the spectrum page. Shown are many different spectral features, including absorption lines and emission lines, superimposed on continuum em ...
... Using the same website as above, click on “spectrum” for the two galaxies whose distances you measured. The optical spectrum of the galaxy is shown at the top of the spectrum page. Shown are many different spectral features, including absorption lines and emission lines, superimposed on continuum em ...
constellation.
... STANDARD 4: The structure and composition of the universe can be learned from studying stars and galaxies and their evolution. (Your project should include information about the Big Bang Theory and how stars, planets and black holes are formed) a. Galaxies are clusters of billions of stars and may h ...
... STANDARD 4: The structure and composition of the universe can be learned from studying stars and galaxies and their evolution. (Your project should include information about the Big Bang Theory and how stars, planets and black holes are formed) a. Galaxies are clusters of billions of stars and may h ...
Neutron Stars, first class
... 3. NS radius is ~100-1000 times smaller. NS cool very rapidly after their formation and they typically have an effective temperature of a few 106 K . These imply L~ 10 Lsun but in X-ray (106 k => 0.1 keV) ...
... 3. NS radius is ~100-1000 times smaller. NS cool very rapidly after their formation and they typically have an effective temperature of a few 106 K . These imply L~ 10 Lsun but in X-ray (106 k => 0.1 keV) ...
PHYS3380_111815_bw - The University of Texas at Dallas
... Remember: General Theory of Relativity predicted gravity could bend space confirmed during a solar eclipse when a star's position was measured before, during and after the eclipse. An object with immense gravity (like a galaxy or black hole) between the Earth and a distant object could bend the ligh ...
... Remember: General Theory of Relativity predicted gravity could bend space confirmed during a solar eclipse when a star's position was measured before, during and after the eclipse. An object with immense gravity (like a galaxy or black hole) between the Earth and a distant object could bend the ligh ...
E3 – Stellar distances
... spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known luminosity in the galaxy. If we had this then we coul ...
... spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known luminosity in the galaxy. If we had this then we coul ...
Observers` Forum - British Astronomical Association
... appearance over the course of a week (Figure 1). Starting in 2008 April there was a well ...
... appearance over the course of a week (Figure 1). Starting in 2008 April there was a well ...
Circumstellar
... Variable A in M33 – a cool hypergiant ~ 45 years in eruption! One of the original Hubble – Sandage ...
... Variable A in M33 – a cool hypergiant ~ 45 years in eruption! One of the original Hubble – Sandage ...
Time From the Perspective of a Particle Physicist
... • It takes 1 day to complete the circle. • The rising and setting time of a star changes with the seasons. • Stars are directly overhead (zenith) 2 hours earlier each month. ...
... • It takes 1 day to complete the circle. • The rising and setting time of a star changes with the seasons. • Stars are directly overhead (zenith) 2 hours earlier each month. ...
Circumstellar medium around rotating massive stars at solar metallicity
... the self-similar evolution phase of the bubble is well recovered, demonstrating the suitability of the chosen approach for the astrophysical problem under consideration (see Fig. 13 and the discussion in Sect. 4.6). The second new tool is an elaborate, object-oriented implementation of the descripti ...
... the self-similar evolution phase of the bubble is well recovered, demonstrating the suitability of the chosen approach for the astrophysical problem under consideration (see Fig. 13 and the discussion in Sect. 4.6). The second new tool is an elaborate, object-oriented implementation of the descripti ...
Guide to observe variable stars project
... filling in a very simple search form. The high-energy sources observed by INTEGRAL are frequently very variable at all wavelengths, including in visible light. The comparison of the light curves at different wavelengths (or energies) gives important clues about the physical properties of the emittin ...
... filling in a very simple search form. The high-energy sources observed by INTEGRAL are frequently very variable at all wavelengths, including in visible light. The comparison of the light curves at different wavelengths (or energies) gives important clues about the physical properties of the emittin ...
Star-D_Teacher_Guide - The University of Texas at Dallas
... or meters to feet might help them to understand the distances in the model. A mile is equal to about 1.6 kilometers, and a meter is equal to about 3.3 feet, so the distance between Alpha Centauri A and B is roughly 1000 ft. Maps of your state, region, or province will help in discussing distance of ...
... or meters to feet might help them to understand the distances in the model. A mile is equal to about 1.6 kilometers, and a meter is equal to about 3.3 feet, so the distance between Alpha Centauri A and B is roughly 1000 ft. Maps of your state, region, or province will help in discussing distance of ...
THE N/O RATIO IN EARLY B-TYPE MAIN SEQUENCE STARS AS
... logC , logN , and logO for MS B-stars found in Ref. 14, together with recent estimates of the abundances of C, N, and O for the sun [15,16]. The latter were obtained using nonstationary hydrodynamic 3D models of the solar atmosphere. We note that the elemental abundances here and in the ...
... logC , logN , and logO for MS B-stars found in Ref. 14, together with recent estimates of the abundances of C, N, and O for the sun [15,16]. The latter were obtained using nonstationary hydrodynamic 3D models of the solar atmosphere. We note that the elemental abundances here and in the ...
The history of a discovery - Institut d`Astrophysique Spatiale
... visible vs infrared output • the heavy elements (and associated dust) abundance in the universe is increasing with time • a naïve view would thus predict a decreasing FIR/visible ratio with redshift • a few galaxies had been shown to have a large ratio but the bulk of the galaxies were expected to h ...
... visible vs infrared output • the heavy elements (and associated dust) abundance in the universe is increasing with time • a naïve view would thus predict a decreasing FIR/visible ratio with redshift • a few galaxies had been shown to have a large ratio but the bulk of the galaxies were expected to h ...
Exoplanets - Polarisation.eu
... Exoplanets or ‘extrasolar planets’ are planets that orbit other stars than the Sun. Here is a beautiful artist’s impression of an exoplanet in orbit around 2 red dwarf stars. For centuries, people have looked up in the sky and wondered whether there were other worlds like the Earth. The other planet ...
... Exoplanets or ‘extrasolar planets’ are planets that orbit other stars than the Sun. Here is a beautiful artist’s impression of an exoplanet in orbit around 2 red dwarf stars. For centuries, people have looked up in the sky and wondered whether there were other worlds like the Earth. The other planet ...
AST1100 Lecture Notes
... have been born from the same cloud of gas and which are still gravitationally bound to each other. The advantage with this is that all stars have very similar age. This makes it easier to predict the distribution of the stars in the HR-diagram based on the theory of stellar evolution. Another advant ...
... have been born from the same cloud of gas and which are still gravitationally bound to each other. The advantage with this is that all stars have very similar age. This makes it easier to predict the distribution of the stars in the HR-diagram based on the theory of stellar evolution. Another advant ...
Emission Spectra
... radio waves. For this reason, we can place radio telescopes on Earth's surface and radio astronomy was the first non-optical study of radiation from space. A number of the most massive galaxies were found to be extremely powerful sources of radio waves. Radio astronomy led to the discovery of pulsar ...
... radio waves. For this reason, we can place radio telescopes on Earth's surface and radio astronomy was the first non-optical study of radiation from space. A number of the most massive galaxies were found to be extremely powerful sources of radio waves. Radio astronomy led to the discovery of pulsar ...
Formation and composition of planets around very low mass stars
... the planetary mass: planets that do not contain a lot of water are generally of lower mass (below ∼ 1M⊕ , although some can be as massive as ∼ 1.5M⊕ ), and planets totally devoid of water are all less massive than 1M⊕ , and even lower than 0.4M⊕ if one does not consider the massive disks. This can b ...
... the planetary mass: planets that do not contain a lot of water are generally of lower mass (below ∼ 1M⊕ , although some can be as massive as ∼ 1.5M⊕ ), and planets totally devoid of water are all less massive than 1M⊕ , and even lower than 0.4M⊕ if one does not consider the massive disks. This can b ...
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.