WFPC2
... forces from NGC 2207 have distorted the shape of its smaller dance partner, flinging out stars and gas into long streamers that extend 100,000 light-years toward the right-hand edge of the picture. Eventually this dance will end. Billions of years from now the two galaxies will become one. ...
... forces from NGC 2207 have distorted the shape of its smaller dance partner, flinging out stars and gas into long streamers that extend 100,000 light-years toward the right-hand edge of the picture. Eventually this dance will end. Billions of years from now the two galaxies will become one. ...
Chapter 12
... understanding the H-R diagram – For stars of a given temperature, the larger the radius, the larger the luminosity – Therefore, as one moves up the H-R diagram, a star’s radius must become bigger – On the other hand, for a given luminosity, the larger the radius, the smaller the temperature – Theref ...
... understanding the H-R diagram – For stars of a given temperature, the larger the radius, the larger the luminosity – Therefore, as one moves up the H-R diagram, a star’s radius must become bigger – On the other hand, for a given luminosity, the larger the radius, the smaller the temperature – Theref ...
Stellar Luminosities
... • When we learn how to get distances beyond the limits of parallax and sample many more stars, we will find there are stars that are stars that are 106 times the luminosity of the Sun. • This is an enormous range in energy output from stars. This is an important clue in figuring out how they produce ...
... • When we learn how to get distances beyond the limits of parallax and sample many more stars, we will find there are stars that are stars that are 106 times the luminosity of the Sun. • This is an enormous range in energy output from stars. This is an important clue in figuring out how they produce ...
The Dual Nature of Light
... (black body is opaque and radiates as a function of its T); amount of energy from a BB is given by the Planck function: E=2hc2/λ5[e(hc/λkT)-1] ergs/cm2/s/Å Note there is some E at all wavelengths even if its not visible ...
... (black body is opaque and radiates as a function of its T); amount of energy from a BB is given by the Planck function: E=2hc2/λ5[e(hc/λkT)-1] ergs/cm2/s/Å Note there is some E at all wavelengths even if its not visible ...
Building on the Work of Others
... His name was Isaac Newton. Newton showed that the same force that controls the motion of objects on Earth also controls the motion of objects in space. This force is gravity. All the planets are moving through space. Some move faster than others. Because of their motion, you would think that planets ...
... His name was Isaac Newton. Newton showed that the same force that controls the motion of objects on Earth also controls the motion of objects in space. This force is gravity. All the planets are moving through space. Some move faster than others. Because of their motion, you would think that planets ...
Draft recommendations for the NASA/NSF investment in future PRV
... “…The first task on the ground is to improve the precision radial velocity method by which the majority of the close to 500 known exoplanets have been discovered…Using existing large ground-based or ...
... “…The first task on the ground is to improve the precision radial velocity method by which the majority of the close to 500 known exoplanets have been discovered…Using existing large ground-based or ...
Low Mass
... What makes a red giant star so large? A. The helium-rich core has expanded, pushing the outer layers of the star outward. ...
... What makes a red giant star so large? A. The helium-rich core has expanded, pushing the outer layers of the star outward. ...
Star in a Box
... The stars Vega and Sirius are brighter than the Sun, and also hotter. Where would you put them? Where would you mark the Sun on the plot? ...
... The stars Vega and Sirius are brighter than the Sun, and also hotter. Where would you put them? Where would you mark the Sun on the plot? ...
Transcript - Chandra X
... there are many more stellar classes than OBAFGKM; however for simplicity’s sake, only the classes that contain a large majority are shown. Absolute magnitude – the intrinsic brightness of stars – is similar to the pH scale, as it is a logarithmic scale. If all the stars in the sky were placed in a r ...
... there are many more stellar classes than OBAFGKM; however for simplicity’s sake, only the classes that contain a large majority are shown. Absolute magnitude – the intrinsic brightness of stars – is similar to the pH scale, as it is a logarithmic scale. If all the stars in the sky were placed in a r ...
December 2010 Clear Skies Newsletter PDF
... small and faint, hiding in the glare of the stars they orbit. "A dust tail like Earth's could produce a bigger signal than a planet does. And it could alert researchers to a planet too small to see otherwise." Earth has a dust tail not because the planet itself is particularly dusty, but rather beca ...
... small and faint, hiding in the glare of the stars they orbit. "A dust tail like Earth's could produce a bigger signal than a planet does. And it could alert researchers to a planet too small to see otherwise." Earth has a dust tail not because the planet itself is particularly dusty, but rather beca ...
CONSTELLATION CANES VENATICI the two hunting dogs Canes
... beautiful galaxies visible, M51 has many star-forming regions and nebulae in its arms, colouring them pink and blue in contrast to the older yellow core. M51 has a smaller companion, NGC 5195, that has very few star-forming regions and thus appears yellow. It is passing behind M51 and may be the cau ...
... beautiful galaxies visible, M51 has many star-forming regions and nebulae in its arms, colouring them pink and blue in contrast to the older yellow core. M51 has a smaller companion, NGC 5195, that has very few star-forming regions and thus appears yellow. It is passing behind M51 and may be the cau ...
The Milky Way - Houston Community College System
... Some neutron stars have magnetic fields ~ 100 times stronger even than normal neutron stars. These care called Magnetars. ...
... Some neutron stars have magnetic fields ~ 100 times stronger even than normal neutron stars. These care called Magnetars. ...
Dark Matter Burners
... Difficult to see how they could have efficiently migrated in given the short time since birth Conventional hypotheses discussed are: “old stars masquerading as young” or “hot dwarfs – stripped cores of red giants” ...
... Difficult to see how they could have efficiently migrated in given the short time since birth Conventional hypotheses discussed are: “old stars masquerading as young” or “hot dwarfs – stripped cores of red giants” ...
Stars PowerPoint
... – A binary star is two stars that are gravitationally bound together and that orbit a common center of mass. – More than half of the stars in the sky are either binary stars or members of multiple-star systems. – Astronomers are able to identify binary stars through several methods. • Accurate measu ...
... – A binary star is two stars that are gravitationally bound together and that orbit a common center of mass. – More than half of the stars in the sky are either binary stars or members of multiple-star systems. – Astronomers are able to identify binary stars through several methods. • Accurate measu ...
Surveying the Stars
... • How do we measure the age of a star cluster? • Because all of a cluster’s stars we born at the same time, we can measure a cluster’s age by finding the main sequence turnoff point on an H–R diagram of its stars. The cluster’s age is equal to the hydrogenburning lifetime of the hottest, most lumino ...
... • How do we measure the age of a star cluster? • Because all of a cluster’s stars we born at the same time, we can measure a cluster’s age by finding the main sequence turnoff point on an H–R diagram of its stars. The cluster’s age is equal to the hydrogenburning lifetime of the hottest, most lumino ...
Age aspects of habitability - Cambridge University Press
... Abstract: A ‘habitable zone’ of a star is defined as a range of orbits within which a rocky planet can support liquid water on its surface. The most intriguing question driving the search for habitable planets is whether they host life. But is the age of the planet important for its habitability? If ...
... Abstract: A ‘habitable zone’ of a star is defined as a range of orbits within which a rocky planet can support liquid water on its surface. The most intriguing question driving the search for habitable planets is whether they host life. But is the age of the planet important for its habitability? If ...
Why Aren`t All Galaxies Barred?
... the bar instability is totally suppressed. However, this again is hard to reconcile with the observed facts. The bulge of a typical disk galaxy provides about 20% of the total light and it is unlikely to contain 70% of the mass. In fact, estimates of its mass from observed rotation curves support a ...
... the bar instability is totally suppressed. However, this again is hard to reconcile with the observed facts. The bulge of a typical disk galaxy provides about 20% of the total light and it is unlikely to contain 70% of the mass. In fact, estimates of its mass from observed rotation curves support a ...
January 2016 - Newbury Astronomical Society
... The constellation of Orion in the south at midnight in mid January As well as being one of the most spectacular and A star like our Sun will fuse Hydrogen into Helium and beautiful constellations, Orion is also very interesting towards the end of its life will begin to fuse some of the because we ca ...
... The constellation of Orion in the south at midnight in mid January As well as being one of the most spectacular and A star like our Sun will fuse Hydrogen into Helium and beautiful constellations, Orion is also very interesting towards the end of its life will begin to fuse some of the because we ca ...
across
... emitted by the Sun in its lifetime. To do this, you simply multiply the amount of energy the Sun radiates each second (L=3.9x1026W) by its age. ...
... emitted by the Sun in its lifetime. To do this, you simply multiply the amount of energy the Sun radiates each second (L=3.9x1026W) by its age. ...
Day 2
... Finally, the rate of fusion becomes high enough to establish gravitational equilibrium. At this point, fusion becomes self-sustaining and the star settles into its hydrogen burning, main sequence life. The main sequence phase is the longest phase of a star's life, about 10 billion years for a star w ...
... Finally, the rate of fusion becomes high enough to establish gravitational equilibrium. At this point, fusion becomes self-sustaining and the star settles into its hydrogen burning, main sequence life. The main sequence phase is the longest phase of a star's life, about 10 billion years for a star w ...
How astero-seismology can help to infer properties of - IAG-Usp
... with linear splittings: • not yet the splittings ! Splitting large enough to be detected •High frequency p-modes probe external layer rotation ...
... with linear splittings: • not yet the splittings ! Splitting large enough to be detected •High frequency p-modes probe external layer rotation ...