Star Map - Science Centre
... The Big Dipper is one of the most famous asterisms (star patterns) throughout history. In some places of the Northern Hemisphere, its seven brightest stars can be seen all year round. Further South near the equator, it is only visible for a few months. Merak and Dubhe are known as The Pointers, poin ...
... The Big Dipper is one of the most famous asterisms (star patterns) throughout history. In some places of the Northern Hemisphere, its seven brightest stars can be seen all year round. Further South near the equator, it is only visible for a few months. Merak and Dubhe are known as The Pointers, poin ...
1. setting the scene 2. the cosmic dark ages and the first stars
... Our knowledge of the process by which gas turns into stars is still sketchy. One thing we do know is that stars are not all of the same mass – when a cloud of gas cools and condenses to form a cluster of stars, some stars will be as heavy as our Sun, while others will be less massive and yet others ...
... Our knowledge of the process by which gas turns into stars is still sketchy. One thing we do know is that stars are not all of the same mass – when a cloud of gas cools and condenses to form a cluster of stars, some stars will be as heavy as our Sun, while others will be less massive and yet others ...
December
... of energy from this process, nearly three times the global power production from all sources of fuel. Because the surface-area-tomass ratio of our planet (like all large rocky worlds) is small, that energy has a hard time escaping, building-up and releasing sporadically in catastrophic events: volca ...
... of energy from this process, nearly three times the global power production from all sources of fuel. Because the surface-area-tomass ratio of our planet (like all large rocky worlds) is small, that energy has a hard time escaping, building-up and releasing sporadically in catastrophic events: volca ...
Chapter 2
... Sirius looks brighter than Alpha Centauri, but we know that Alpha Centauri is closer because its apparent position in the sky shifts by a larger amount as Earth orbits the Sun. ...
... Sirius looks brighter than Alpha Centauri, but we know that Alpha Centauri is closer because its apparent position in the sky shifts by a larger amount as Earth orbits the Sun. ...
The Earth in Context: Universe and Solar System
... Supernova: cataclysmic explosion of star, millions of times increase in brightness, with massive loss of mass, thought to represent final stages of stars fuel ...
... Supernova: cataclysmic explosion of star, millions of times increase in brightness, with massive loss of mass, thought to represent final stages of stars fuel ...
Activities
... This means that when the planet is closer to the Sun, it moves faster than it does when it is far away. This also means that a planet with a highly eccentric orbit will move at a variety of speeds, while a planet with a nearly-circular orbit will only vary a little in its ...
... This means that when the planet is closer to the Sun, it moves faster than it does when it is far away. This also means that a planet with a highly eccentric orbit will move at a variety of speeds, while a planet with a nearly-circular orbit will only vary a little in its ...
ATA2010
... To study the dynamics of the Milky Way. Most of its visible mass is in stars, so the dynamical theory is mostly stellar dynamics Following this basic descriptive introduction, I will go straight to the lectures on the theoretical dynamics. This will give you maximum opportunity to complete the assig ...
... To study the dynamics of the Milky Way. Most of its visible mass is in stars, so the dynamical theory is mostly stellar dynamics Following this basic descriptive introduction, I will go straight to the lectures on the theoretical dynamics. This will give you maximum opportunity to complete the assig ...
PPT - ALFALFA survey
... Luminosity - Color Diagram. The ADBS galaxies display a weak relationship between MB and color, in the sense that dwarfier galaxies tend to be bluer. There are many outliers, however. ...
... Luminosity - Color Diagram. The ADBS galaxies display a weak relationship between MB and color, in the sense that dwarfier galaxies tend to be bluer. There are many outliers, however. ...
Introduction
... by strong forbidden lines of metals and recombination lines of hydrogen and helium. As an example, the infrared spectrum (ISO-SWS) of the bright PN NGC 7027 is shown in Fig. 1.4. The spectrum is very rich in all kind of features. High stages of ionization for several ions are reached. Recombination ...
... by strong forbidden lines of metals and recombination lines of hydrogen and helium. As an example, the infrared spectrum (ISO-SWS) of the bright PN NGC 7027 is shown in Fig. 1.4. The spectrum is very rich in all kind of features. High stages of ionization for several ions are reached. Recombination ...
chapter17StarStuff
... • High-mass stars with >8MSun have short lives, eventually becoming hot enough to make iron, and end in supernova explosions • Low-mass stars with <2MSun have long lives, never become hot enough to fuse carbon nuclei, and end as white dwarfs • Intermediate mass stars can make elements heavier than c ...
... • High-mass stars with >8MSun have short lives, eventually becoming hot enough to make iron, and end in supernova explosions • Low-mass stars with <2MSun have long lives, never become hot enough to fuse carbon nuclei, and end as white dwarfs • Intermediate mass stars can make elements heavier than c ...
Chandra Sees the Atmosphere of a Neutron Star - Chandra X
... NASA Press Release – “The Chandra X-ray Observatory image to the left shows the central region of the supernova remnant Cassiopeia A. This interstellar cloud 14 light years across, is all that remains of a massive star that exploded 330 years ago. A careful analysis of the X-ray data has revealed th ...
... NASA Press Release – “The Chandra X-ray Observatory image to the left shows the central region of the supernova remnant Cassiopeia A. This interstellar cloud 14 light years across, is all that remains of a massive star that exploded 330 years ago. A careful analysis of the X-ray data has revealed th ...
presentation (PPT format)
... have their own motions relative to one another thanks to their mutual gravitational attraction-for distant galaxies the Hubble speed is much greater than any intrinsic motions that the galaxies might have • The value of H0? Depends on the determination of the distance (vary depending on the techniqu ...
... have their own motions relative to one another thanks to their mutual gravitational attraction-for distant galaxies the Hubble speed is much greater than any intrinsic motions that the galaxies might have • The value of H0? Depends on the determination of the distance (vary depending on the techniqu ...
Procedurally Generating an Artificial Galaxy
... The last step in determining the spatial distribution of stars is to generate the location of the stars within each cube. We will generate three random numbers (U1, U2, and U3) from U(0,1) for each star. These numbers determine the stars position in the three dimensions where 0 is at one edge of the ...
... The last step in determining the spatial distribution of stars is to generate the location of the stars within each cube. We will generate three random numbers (U1, U2, and U3) from U(0,1) for each star. These numbers determine the stars position in the three dimensions where 0 is at one edge of the ...
Cosmochemistry from Nanometers to Light- Years A Written by
... Cosmochemistry and astronomy address fundamental questions about human existence. Where did we come from? How did the stars and planets form? Did the planets around other stars form in the same way that ours did? How did life arise? Significant breakthroughs have occurred because of a combination of ...
... Cosmochemistry and astronomy address fundamental questions about human existence. Where did we come from? How did the stars and planets form? Did the planets around other stars form in the same way that ours did? How did life arise? Significant breakthroughs have occurred because of a combination of ...
The Extragalactic Group of MPE and USM
... • faint end slope of luminosity function is shallow at high z • LF evolution stronger at shorter wavelength • F* decreases, L* increases with redshift in all bands • analysis of cosmic SFH not very sensitive to l-selection • at all z, L>L* galaxies contribute ~1/3 to total SFR, but less to SSFR • at ...
... • faint end slope of luminosity function is shallow at high z • LF evolution stronger at shorter wavelength • F* decreases, L* increases with redshift in all bands • analysis of cosmic SFH not very sensitive to l-selection • at all z, L>L* galaxies contribute ~1/3 to total SFR, but less to SSFR • at ...
Pre-Final Quiz Answers
... to 40Ca (calcium-40) through emission of a β particle. The decay half-life is approximately 1.26 billion years. The oldest rocks on Earth show ages of about 4 billion years. If a zircon crystal in these rocks formed 4 billion years ago with 1000 atoms of 40K and no 40Ar or 40Ca, what would we expect ...
... to 40Ca (calcium-40) through emission of a β particle. The decay half-life is approximately 1.26 billion years. The oldest rocks on Earth show ages of about 4 billion years. If a zircon crystal in these rocks formed 4 billion years ago with 1000 atoms of 40K and no 40Ar or 40Ca, what would we expect ...
Chemical Evolution
... (Roediger et al arxiv 1310.3275) • High abundances (1.7-2.5x solar) indicates that GCs formed rapidly before type Ia's contributed much to the gas (~1 Gyr) • However their remains puzzling patterns in how the different elemental abundances are correlated ...
... (Roediger et al arxiv 1310.3275) • High abundances (1.7-2.5x solar) indicates that GCs formed rapidly before type Ia's contributed much to the gas (~1 Gyr) • However their remains puzzling patterns in how the different elemental abundances are correlated ...
Letter to the Editor The formation of bipolar planetary nebulae
... But the morphology of both images is much more bipolar than the ones from run A. At a time of 507 years after the end of the AGB, the stellar effective temperature is 226 000 K. 4. Discussion Both models are still in their early evolutionary stages and one should therefore be careful drawing far rea ...
... But the morphology of both images is much more bipolar than the ones from run A. At a time of 507 years after the end of the AGB, the stellar effective temperature is 226 000 K. 4. Discussion Both models are still in their early evolutionary stages and one should therefore be careful drawing far rea ...
pptx
... where h is Planck’s constant, c is speed of light, l is wavelength this picture of light is vital in understanding how light and atoms interact ...
... where h is Planck’s constant, c is speed of light, l is wavelength this picture of light is vital in understanding how light and atoms interact ...
Neil F. Comins - Kuwait Life Sciences Company
... concepts for students who learn in different ways. • helping students compare their beliefs with the findings of modern science and understand why the scientific view is correct. • using analogies from everyday life to make cosmic phenomena more concrete. • presenting the observations and underlying ...
... concepts for students who learn in different ways. • helping students compare their beliefs with the findings of modern science and understand why the scientific view is correct. • using analogies from everyday life to make cosmic phenomena more concrete. • presenting the observations and underlying ...
Spectroscopy
... - Transit (when the planet goes in front of the star, dimming it like a binary light curve.) - Microlensing (when gravity from the system can act like a lens, bending light around to magnify possible planets in the system.) ...
... - Transit (when the planet goes in front of the star, dimming it like a binary light curve.) - Microlensing (when gravity from the system can act like a lens, bending light around to magnify possible planets in the system.) ...
Senior thesis - University of Texas Astronomy Home Page
... example, a star’s mass, rotation rate, equation of state, and nuclear reaction rates. By studying the rate of change of WD pulsations we can explore galactic time measurements, orbiting planets, dark matter theories, or interior crystallization. Yet, to obtain accurate pulsation measurements, astron ...
... example, a star’s mass, rotation rate, equation of state, and nuclear reaction rates. By studying the rate of change of WD pulsations we can explore galactic time measurements, orbiting planets, dark matter theories, or interior crystallization. Yet, to obtain accurate pulsation measurements, astron ...
PHYS3380_110415_bw - The University of Texas at Dallas
... ･After the hydrogen is used up in the core, the helium core contracts, and heats the hydrogen rich layer just outside of the core. The hydrogen ignites in the shell around the core and the Sun moves to the right in the HR diagram. ･When the outer layers of the Sun become convective, the luminosity o ...
... ･After the hydrogen is used up in the core, the helium core contracts, and heats the hydrogen rich layer just outside of the core. The hydrogen ignites in the shell around the core and the Sun moves to the right in the HR diagram. ･When the outer layers of the Sun become convective, the luminosity o ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.