Planetary Configurations
... • Photons “random walk” or diffuse from core to photosphere. This occurs as atoms and electrons absorb and scatter (bounce) the photons. • Aside from energy, photons also possess momentum, and so they give an outward “kick” against gravity as ...
... • Photons “random walk” or diffuse from core to photosphere. This occurs as atoms and electrons absorb and scatter (bounce) the photons. • Aside from energy, photons also possess momentum, and so they give an outward “kick” against gravity as ...
CASPEC Observations of the Most Metal-Deficient Main
... shown for this star and a sequence of stars with decreasing values of [MgIH]. The stars are main-sequence turnoff stars and have about the same effective temperature as CS 22876-32 (Teff = 6000 K) according to the Strijmgren uvby-(3 photometry. The remarkable line weakness of CS 22876-32 is obvious ...
... shown for this star and a sequence of stars with decreasing values of [MgIH]. The stars are main-sequence turnoff stars and have about the same effective temperature as CS 22876-32 (Teff = 6000 K) according to the Strijmgren uvby-(3 photometry. The remarkable line weakness of CS 22876-32 is obvious ...
The Milky Way By
... million years to complete one orbit of the galaxy (a galactic year), so it is thought to have completed 20–25 orbits during the lifetime of the Sun and 1/1250 of a revolution since the origin of humans. Padurariu Cristian & Danciu Serban ...
... million years to complete one orbit of the galaxy (a galactic year), so it is thought to have completed 20–25 orbits during the lifetime of the Sun and 1/1250 of a revolution since the origin of humans. Padurariu Cristian & Danciu Serban ...
the May 2017 Newsletter!
... at intervals to see if they had opened up enough to appear separated. Our observing evening records over the past few years suggest that we sometimes thought we could split them, and sometimes thought we couldn’t split them. However, on this evening, although very close, the star could quite easily ...
... at intervals to see if they had opened up enough to appear separated. Our observing evening records over the past few years suggest that we sometimes thought we could split them, and sometimes thought we couldn’t split them. However, on this evening, although very close, the star could quite easily ...
1 - Quia
... B. Carbon C. Hydrogen D. Nitrogen 16. What is the first stage in the life cycle of a star? (2 points) ...
... B. Carbon C. Hydrogen D. Nitrogen 16. What is the first stage in the life cycle of a star? (2 points) ...
Galaxy5
... • The gas collided and sunk to the center. The Milky Way was built up piece-meal in this fashion. • Today, galaxy interactions between the primary spiral galaxy and its satellites are much less frequent, because there are few satellites remaining. • The Milky Way is in the process of eating a satell ...
... • The gas collided and sunk to the center. The Milky Way was built up piece-meal in this fashion. • Today, galaxy interactions between the primary spiral galaxy and its satellites are much less frequent, because there are few satellites remaining. • The Milky Way is in the process of eating a satell ...
Lecture 31 - 2 The Death of Stars: Stellar Recycling Phase 3 -
... • Helium core shrinks by a factor of ~30 to a size approximately that of the Earth • Hydrogen “burning” (i.e. H→He+energy release) continues in a thin shell just outside collapsing He core. • total luminosity of star increases by 100 to 1000 due to renewed H burning + heating of collapsing core. • o ...
... • Helium core shrinks by a factor of ~30 to a size approximately that of the Earth • Hydrogen “burning” (i.e. H→He+energy release) continues in a thin shell just outside collapsing He core. • total luminosity of star increases by 100 to 1000 due to renewed H burning + heating of collapsing core. • o ...
Lecture 5: Light as a tool
... • Hipparcos mission (European Space Agency) measured the stellar parallax of roughly 100,000 stars with precision of a few milli-arcseconds. So, it can measure distance of star up to 1,000 light-years away… ...
... • Hipparcos mission (European Space Agency) measured the stellar parallax of roughly 100,000 stars with precision of a few milli-arcseconds. So, it can measure distance of star up to 1,000 light-years away… ...
First Exam - University of Iowa Astrophysics
... 26. You look up in the night sky and see the planet Jupiter, the planet Mars, and the Moon very close together. You know that they are located in or close to one of the following. Which is it? (a) the ecliptic ∗ (b) the celestial equator (c) the zenith (d) the north celestial pole (e) the constellat ...
... 26. You look up in the night sky and see the planet Jupiter, the planet Mars, and the Moon very close together. You know that they are located in or close to one of the following. Which is it? (a) the ecliptic ∗ (b) the celestial equator (c) the zenith (d) the north celestial pole (e) the constellat ...
Signs of the Zodiac: Capricorn
... Secunda Giedi (Alpha-2 Capricorni), which are separated by 0.11 degrees in the sky. Nashira γ Capricorni (Gamma Capricorni) is a blue-white A-type giant, approximately 139 light years distant. Its name is derived from the Arabic phrase for “bearer of good news.” It has an apparent magnitude of 3.69 ...
... Secunda Giedi (Alpha-2 Capricorni), which are separated by 0.11 degrees in the sky. Nashira γ Capricorni (Gamma Capricorni) is a blue-white A-type giant, approximately 139 light years distant. Its name is derived from the Arabic phrase for “bearer of good news.” It has an apparent magnitude of 3.69 ...
File
... black hole, an extremely dense area from which light cannot escape. Our galaxy is believed to be a barred spiral galaxy, similar in appearance to the Andromeda Galaxy. o Elliptical galaxies are spherical or elliptical (oval) in shape. They may be older than spiral galaxies, because they do not seem ...
... black hole, an extremely dense area from which light cannot escape. Our galaxy is believed to be a barred spiral galaxy, similar in appearance to the Andromeda Galaxy. o Elliptical galaxies are spherical or elliptical (oval) in shape. They may be older than spiral galaxies, because they do not seem ...
Milky Way thin disk
... Q: in order to study the spatial distribution of the thin disk (which dominates the Milky Way luminosity) surface photometry in the K band from space has been used. What is the advantage of the K band? What sort of stars give off most of their light at 2 ...
... Q: in order to study the spatial distribution of the thin disk (which dominates the Milky Way luminosity) surface photometry in the K band from space has been used. What is the advantage of the K band? What sort of stars give off most of their light at 2 ...
Print Activity - Let`s Talk Science
... 7. You’ve found the North Star! If you face towards the North Star, you will be facing north. What’s happening? A constellation is a group of stars in the sky that form a fixed pattern in relation to each other, as viewed from the Earth. Astronomers currently recognize 88 constellations in the North ...
... 7. You’ve found the North Star! If you face towards the North Star, you will be facing north. What’s happening? A constellation is a group of stars in the sky that form a fixed pattern in relation to each other, as viewed from the Earth. Astronomers currently recognize 88 constellations in the North ...
Stars and Galaxies part 3
... • Most stars are composed predominately of hydrogen, the lightest and most basic element in the universe. • Helium is the second most common element in a typical star. • Hydrogen and Helium = 96-99% of a star’s mass. • Other elements often include oxygen, neon, carbon, and nitrogen and even heavier ...
... • Most stars are composed predominately of hydrogen, the lightest and most basic element in the universe. • Helium is the second most common element in a typical star. • Hydrogen and Helium = 96-99% of a star’s mass. • Other elements often include oxygen, neon, carbon, and nitrogen and even heavier ...
Chapter 9 “The Family of Stars “
... spectroscopic parallax is to obtain a spectrum of the star from which its spectral type and luminosity class can be determined. The absorption lines that are present can be used to determine the spectral type, and the widths of some of these lines can be used to determine its luminosity class. These ...
... spectroscopic parallax is to obtain a spectrum of the star from which its spectral type and luminosity class can be determined. The absorption lines that are present can be used to determine the spectral type, and the widths of some of these lines can be used to determine its luminosity class. These ...
Powerpoint
... Ellipticals are classified according to their shape, from E0 (almost spherical) to E7 (the most ...
... Ellipticals are classified according to their shape, from E0 (almost spherical) to E7 (the most ...
Life Cycle of a Star
... medium mass star from red giant to white dwarf (stage 13). Eventually, the star will cool down, radiating heat into space, fading into black lumps of carbon. This is when the star becomes a black dwarf (stage 14) . ...
... medium mass star from red giant to white dwarf (stage 13). Eventually, the star will cool down, radiating heat into space, fading into black lumps of carbon. This is when the star becomes a black dwarf (stage 14) . ...
Part 3
... (secondary star) be covered， the effective temperature of the secondary star is higher, its spectral type always to be G-K). ...
... (secondary star) be covered， the effective temperature of the secondary star is higher, its spectral type always to be G-K). ...
Helium Fusion What Will Happen When There Is No More Helium in
... • Low mass: < 2 times the Sun • Intermediate mass: 2-8 times the Sun • High mass: > 8 times the Sun ...
... • Low mass: < 2 times the Sun • Intermediate mass: 2-8 times the Sun • High mass: > 8 times the Sun ...
Multiple Choice, continued
... • Galaxies are the major building blocks of the universe. Astronomers estimate that the universe contains hundreds of billions of galaxies. • A typical galaxy, such as the Milky Way, has a diameter of about 100,000 light-years and may contain more than 200 billion stars. ...
... • Galaxies are the major building blocks of the universe. Astronomers estimate that the universe contains hundreds of billions of galaxies. • A typical galaxy, such as the Milky Way, has a diameter of about 100,000 light-years and may contain more than 200 billion stars. ...
Reading Preview
... Learning Target: I can ___________________________________________ Key Concept: Characteristics used to classify stars include _________, ________________, _________, ______________, and ______________. A star’s ________ gives clues about the star’s temperature. The coolest stars appear ________. ...
... Learning Target: I can ___________________________________________ Key Concept: Characteristics used to classify stars include _________, ________________, _________, ______________, and ______________. A star’s ________ gives clues about the star’s temperature. The coolest stars appear ________. ...
P10263v1.2 Lab 5 Text
... sky during the spring, there is a small asterism known as “The Pleiades”, which marks the location of a cluster of stars. In legend, the Pleiades are the seven sisters, daughters of Atlas, the titan who holds up the sky, and the Oceanid named Pleione. The sisters are Alcyone, Maia, Electra, Taygeta, ...
... sky during the spring, there is a small asterism known as “The Pleiades”, which marks the location of a cluster of stars. In legend, the Pleiades are the seven sisters, daughters of Atlas, the titan who holds up the sky, and the Oceanid named Pleione. The sisters are Alcyone, Maia, Electra, Taygeta, ...
Stars: Their Life and Afterlife
... • They trigger new rounds of star formation • They form large-scale structures in the galaxy, called “superbubbles” ...
... • They trigger new rounds of star formation • They form large-scale structures in the galaxy, called “superbubbles” ...
The Milky Way Galaxy
... spheroidal galaxies. Both globular clusters and dwarf spheroidal galaxies give rise to tidal streams. Globular clusters appear to contain no dark matter, while dwarf spheroidal galaxies are dominated by dark matter. Stars account for more than half of the ...
... spheroidal galaxies. Both globular clusters and dwarf spheroidal galaxies give rise to tidal streams. Globular clusters appear to contain no dark matter, while dwarf spheroidal galaxies are dominated by dark matter. Stars account for more than half of the ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.