150 Million ly - Northern Michigan University
... • Ellipticals are mostly composed of Pop II stars that appear to have formed over 4 billion years ago in a burst of star formation. • Spirals seem to have a more steadier approach to star formation ...
... • Ellipticals are mostly composed of Pop II stars that appear to have formed over 4 billion years ago in a burst of star formation. • Spirals seem to have a more steadier approach to star formation ...
Chapter 1 - Princeton University Press
... Hubble studied the Andromeda Nebula, which had been thought by many, including Shapley, to be a gas cloud within the Milky Way. The word nebula comes from the Latin nubes, or “cloud,” denoting the fuzzy appearance of these objects. By careful observations with the new 100-inch telescope, Hubble disc ...
... Hubble studied the Andromeda Nebula, which had been thought by many, including Shapley, to be a gas cloud within the Milky Way. The word nebula comes from the Latin nubes, or “cloud,” denoting the fuzzy appearance of these objects. By careful observations with the new 100-inch telescope, Hubble disc ...
Notes (PowerPoint)
... • Motion in orbit regular, like a clock (here, Io) • “Late” eclipse in Earth position 2 due to light traveling across diameter of earth’s orbit • Estimated speed at 140,000 mi/sec • Modern value 186,000 mi/sec ...
... • Motion in orbit regular, like a clock (here, Io) • “Late” eclipse in Earth position 2 due to light traveling across diameter of earth’s orbit • Estimated speed at 140,000 mi/sec • Modern value 186,000 mi/sec ...
Ellipticity, Its Origin and Progression in Comoving Galaxies
... regions actually manifests as a non-Platonic, quasi-regular, dodecahedron when "close-packed" as part of an infinite universe. As for the size of these cosmic structures, they are in agreement with astronomical observations [11], viz, approximately 350 million lightyears (Mly) in diameter. Turning o ...
... regions actually manifests as a non-Platonic, quasi-regular, dodecahedron when "close-packed" as part of an infinite universe. As for the size of these cosmic structures, they are in agreement with astronomical observations [11], viz, approximately 350 million lightyears (Mly) in diameter. Turning o ...
Morphological characteristics of OB spectra and environments
... The Antennae, at a distance of about 20 Mpc, constitute the nearest major merger and are thus a key system for understanding this phenomenon, which is ubiquitous at greater distances in the earlier Universe. Accordingly, it has been the subject of intensive investigation. With HST imaging, [26] have ...
... The Antennae, at a distance of about 20 Mpc, constitute the nearest major merger and are thus a key system for understanding this phenomenon, which is ubiquitous at greater distances in the earlier Universe. Accordingly, it has been the subject of intensive investigation. With HST imaging, [26] have ...
Basics of chemical evolution
... • Consider a dM of gas inflow, so that the mass pdM of metals is returned to the ISM (interstellar medium) after stars form and evolve. • The global effect is to remove a gas mass of metallicity Z (transform it into stars) and return the same mass at metallicity p. • If this process is continued eve ...
... • Consider a dM of gas inflow, so that the mass pdM of metals is returned to the ISM (interstellar medium) after stars form and evolve. • The global effect is to remove a gas mass of metallicity Z (transform it into stars) and return the same mass at metallicity p. • If this process is continued eve ...
01-Star Atlas Project - Mapping the Heavens
... celestial equator, polar maps show the stars around the north and south poles. Right ascension and declination are encoded on the two types of maps in different ways. On the equatorial maps, the celestial equator runs across the middle of the maps and the hours of right ascension are labeled at the ...
... celestial equator, polar maps show the stars around the north and south poles. Right ascension and declination are encoded on the two types of maps in different ways. On the equatorial maps, the celestial equator runs across the middle of the maps and the hours of right ascension are labeled at the ...
Hvězdný make up Proč jsou hvězdy skvrnité?
... Assuming magnetic field of tepid MS stars is fossil one → all photospheres should be in some extent controlled by magnetic field → transient spot structures on even ‘normal’ (non-CP) tepid MS stars are allowed. ...
... Assuming magnetic field of tepid MS stars is fossil one → all photospheres should be in some extent controlled by magnetic field → transient spot structures on even ‘normal’ (non-CP) tepid MS stars are allowed. ...
A minimum column density of 1gcm(
... For the models shown in Fig. 2 a cloud reaches its equilibrium light-to-mass ratio within about 3tff after star formation begins, and because SFRff is less than about 0.05, at most ,15% of the mass will have gone into low-mass stars at this point. If star formation accelerates in time, as predicted ...
... For the models shown in Fig. 2 a cloud reaches its equilibrium light-to-mass ratio within about 3tff after star formation begins, and because SFRff is less than about 0.05, at most ,15% of the mass will have gone into low-mass stars at this point. If star formation accelerates in time, as predicted ...
Word
... contract (as we discussed earlier when talking about the possible sources of power in the Sun). The transition from transparency to opaqueness as the density increases occurs last for photons of longer wavelength. Just as the proto-star starts to become opaque (and the core hidden from view) the dom ...
... contract (as we discussed earlier when talking about the possible sources of power in the Sun). The transition from transparency to opaqueness as the density increases occurs last for photons of longer wavelength. Just as the proto-star starts to become opaque (and the core hidden from view) the dom ...
Chemical Signatures in Dwarf Galaxies
... elemental abundance ratios to investigate the formation and evolution of dwarf galaxies, particularly when compared with the variety of stellar popu lations in the Galaxy. Abundance ratios can come from H ii region emission lines, planetary nebulae, or supernova remnants, but mostly they come from ...
... elemental abundance ratios to investigate the formation and evolution of dwarf galaxies, particularly when compared with the variety of stellar popu lations in the Galaxy. Abundance ratios can come from H ii region emission lines, planetary nebulae, or supernova remnants, but mostly they come from ...
Pattern recognition of star constellations for spacecraft
... of incidence. The stars closest to the rim of the picture reflected the most (i.e., transmitted less). Therefore they will appear weaker than stars in the center of the picture. This phenomenon must be corrected. Correction for Proper Motion In the PPM catalogue proper motion and position of the sta ...
... of incidence. The stars closest to the rim of the picture reflected the most (i.e., transmitted less). Therefore they will appear weaker than stars in the center of the picture. This phenomenon must be corrected. Correction for Proper Motion In the PPM catalogue proper motion and position of the sta ...
No Slide Title
... • Can vary in brightness, since the cores can vary in size. • Therefore, they are not a good distance indicator. ...
... • Can vary in brightness, since the cores can vary in size. • Therefore, they are not a good distance indicator. ...
Stars and Galaxies
... 1. Find the magnifying power of a telescope with a focal length of 2,500 mm when using eyepieces with focal lengths of 50 mm and 10 mm. 2. Find the magnifying power for a telescope with a focal length of 900 mm when using an eyepiece with a focal length of 12 mm. For more practice problems, go to pa ...
... 1. Find the magnifying power of a telescope with a focal length of 2,500 mm when using eyepieces with focal lengths of 50 mm and 10 mm. 2. Find the magnifying power for a telescope with a focal length of 900 mm when using an eyepiece with a focal length of 12 mm. For more practice problems, go to pa ...
The Milky Way
... Some neutron stars have magnetic fields ~ 1000 times stronger even than normal neutron stars. These care called Magnetars. ...
... Some neutron stars have magnetic fields ~ 1000 times stronger even than normal neutron stars. These care called Magnetars. ...
Finding the aperture radius for photometry with SalsaJ Life Cycle of Stars
... star or galaxy by adding up all of the light from the object. For example, a star looks like a point of light when you look at it just with your eyes but the Earth’s atmosphere smears it out into something that looks like a round blob when you use a telescope to look at it. In order to measure the t ...
... star or galaxy by adding up all of the light from the object. For example, a star looks like a point of light when you look at it just with your eyes but the Earth’s atmosphere smears it out into something that looks like a round blob when you use a telescope to look at it. In order to measure the t ...
Herschel Space Observatory - Science and Technology Facilities
... of the mass of the Sun. Supernovae are one possible source of all the dust we see. The star “CW Leonis” is a massive star nearing the end of its life. It is throwing off its outer layers. In 2009, Herschel discovered that water vapour is being formed much closer to the star than previously thought, ...
... of the mass of the Sun. Supernovae are one possible source of all the dust we see. The star “CW Leonis” is a massive star nearing the end of its life. It is throwing off its outer layers. In 2009, Herschel discovered that water vapour is being formed much closer to the star than previously thought, ...
Dark Matter— More Than Meets The Eye
... dwarf stars too dim to be observed. Or they could be cold planet-like objects with masses about 1/1000 that of the sun. Or maxi- or mini- black holes. Or massive cold gas clouds. All these phenomena are baryonic. There is some observational evidence for the existence of MACHOs. Because they can warp ...
... dwarf stars too dim to be observed. Or they could be cold planet-like objects with masses about 1/1000 that of the sun. Or maxi- or mini- black holes. Or massive cold gas clouds. All these phenomena are baryonic. There is some observational evidence for the existence of MACHOs. Because they can warp ...
Science: Single Award Unit 3 (Physics) Higher Tier
... Use the information from both tables to answer the following questions. (ii) Name the telescope which could be used to observe very hot stars. ________________________________________________________ [1] (iii) Which source will be detected using the XMM Newton telescope? ______________ ...
... Use the information from both tables to answer the following questions. (ii) Name the telescope which could be used to observe very hot stars. ________________________________________________________ [1] (iii) Which source will be detected using the XMM Newton telescope? ______________ ...
Stars, Galaxies, and the Universe Section 1
... • Stars vary in size and mass. • Stars such as the sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. • Most of the stars you can see in the night sky are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less mas ...
... • Stars vary in size and mass. • Stars such as the sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. • Most of the stars you can see in the night sky are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less mas ...
P7 Further Physics : Observing the Universe
... Parallax and parsec quantitatively. The distinction between intrinsic brightness (related to star colour and size) and apparent brightness, seen from Earth. ...
... Parallax and parsec quantitatively. The distinction between intrinsic brightness (related to star colour and size) and apparent brightness, seen from Earth. ...
UMich w/s
... range of sigma is small (data <2) derivative term is (log) luminosity profile : light, NOT mass, and this is similar in scale for all the dSph (factor of few) So the derived mass really is a measure of the radial extent of the data, and only a weak function of ...
... range of sigma is small (data <2) derivative term is (log) luminosity profile : light, NOT mass, and this is similar in scale for all the dSph (factor of few) So the derived mass really is a measure of the radial extent of the data, and only a weak function of ...
Spiral Arms - Harry Kroto
... We can write the result in two different ways to examine the mass of the Galaxy. v = (GMint/r)1/2 Mint = v2r/G We can use the Doppler shift of radio emission from hydrogen gas in the disk of the galaxy to measure the rotation curve: the orbital velocity of the gas in the disk at a given radius. At t ...
... We can write the result in two different ways to examine the mass of the Galaxy. v = (GMint/r)1/2 Mint = v2r/G We can use the Doppler shift of radio emission from hydrogen gas in the disk of the galaxy to measure the rotation curve: the orbital velocity of the gas in the disk at a given radius. At t ...
HST FRONTIER FIELDS PRELIMINARY MAP MODELING CATs
... existing HST ACS + WFC3IR, and public CLASH MCT data. We have measured a spectroscopic redshift of z = 1.9 with Keck/LRIS and VLT/XSHOOTER (Christensen et al. 2012) for one system. The best-fit model for MACSJ0416 consists of three large potentials with velocity dispersions in excess of 700 km/s to ...
... existing HST ACS + WFC3IR, and public CLASH MCT data. We have measured a spectroscopic redshift of z = 1.9 with Keck/LRIS and VLT/XSHOOTER (Christensen et al. 2012) for one system. The best-fit model for MACSJ0416 consists of three large potentials with velocity dispersions in excess of 700 km/s to ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.