PHYS3380_111815_bw - The University of Texas at Dallas
... Image of thin, glowing dust ring around a magnetar. So thin it's almost two-dimensional, and emits no radiation other than a faint, infrared glow. Probably formed after the magnetic star emitted a giant flare, spotted in 1998, which incinerated surrounding dust in all directions, leaving only the th ...
... Image of thin, glowing dust ring around a magnetar. So thin it's almost two-dimensional, and emits no radiation other than a faint, infrared glow. Probably formed after the magnetic star emitted a giant flare, spotted in 1998, which incinerated surrounding dust in all directions, leaving only the th ...
Li-cai Deng
... of one galaxy instead of comparing snapshots of many. It is only now that we have large surveys of the whole sky that we are able to comprehend the Milky Way as a whole. Unlike external galaxies, the picture we are building is in three dimensions of position and velocity, with much higher accuracy i ...
... of one galaxy instead of comparing snapshots of many. It is only now that we have large surveys of the whole sky that we are able to comprehend the Milky Way as a whole. Unlike external galaxies, the picture we are building is in three dimensions of position and velocity, with much higher accuracy i ...
Astrophysics - Cathkin High School
... molecules will have enough energy to escape from the moon. Black Holes and Photons in a Gravitational Field A dense star with a sufficiently large mass and small radius could have an escape velocity greater than 3 x 108 m s-1. This means that light emitted from its surface could not escape - hence t ...
... molecules will have enough energy to escape from the moon. Black Holes and Photons in a Gravitational Field A dense star with a sufficiently large mass and small radius could have an escape velocity greater than 3 x 108 m s-1. This means that light emitted from its surface could not escape - hence t ...
Hubble Space Telescope Image
... At the beginning of the 20th century, what we now call spiral galaxies were referred to as “spiral nebulae” and most astronomers believed them to be clouds of gas and stars associated with our own Milky Way. The breakthrough came in 1924 when Edwin Hubble was able to measure the distance to the “Gre ...
... At the beginning of the 20th century, what we now call spiral galaxies were referred to as “spiral nebulae” and most astronomers believed them to be clouds of gas and stars associated with our own Milky Way. The breakthrough came in 1924 when Edwin Hubble was able to measure the distance to the “Gre ...
Lecture 13 Main Sequence and Low Mass Evolution
... young as they only live for a few Million years. • You can’t tell how old an M dwarf is because their lives can be so long. • The Sun is ~ 5 Billion years old, so it will last only for ~ 5 Billion years longer. ...
... young as they only live for a few Million years. • You can’t tell how old an M dwarf is because their lives can be so long. • The Sun is ~ 5 Billion years old, so it will last only for ~ 5 Billion years longer. ...
PDF - Department of Statistics
... phase of the early evolution of the solar system. This belt is the source of most short–period comets, those with periods of 200 years or less [Edgeworth, 1949], [Kuiper, 1951], [Fernandez, 1980]. Observational success was first achieved with the discovery of 1992QB1 [Jewitt and Luu, 1993]. Major ob ...
... phase of the early evolution of the solar system. This belt is the source of most short–period comets, those with periods of 200 years or less [Edgeworth, 1949], [Kuiper, 1951], [Fernandez, 1980]. Observational success was first achieved with the discovery of 1992QB1 [Jewitt and Luu, 1993]. Major ob ...
PSU/TCfA search for planets around evolved stars
... 2Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 ...
... 2Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 ...
starwalk2 manual en
... If your device has built-in compass tilt your device and the Star Spotter function will be activated. Star Walk™ uses the digital compass to learn which way you are looking. A live representation of what you see in the sky will appear on your display and the sky will start following your movements w ...
... If your device has built-in compass tilt your device and the Star Spotter function will be activated. Star Walk™ uses the digital compass to learn which way you are looking. A live representation of what you see in the sky will appear on your display and the sky will start following your movements w ...
Word Document - Montana State University Extended
... Scientists generally agree that the Earth formed about 4.5 billion years ago yet complex life has existed on the Earth for about the last 500 million years. It is still unclear exactly what chain of events lead up to the emergence of complex life on this planet. One of the factors that scientists be ...
... Scientists generally agree that the Earth formed about 4.5 billion years ago yet complex life has existed on the Earth for about the last 500 million years. It is still unclear exactly what chain of events lead up to the emergence of complex life on this planet. One of the factors that scientists be ...
Pulsating variable stars and the Hertzsprung
... showing a relationship between luminosity (or absolute magnitude) and stars' surface temperature (or spectral type). The bottom scale is ranging from high-temperature blue-white stars (left side of the diagram) to low-temperature red stars (right side). The position of a star on the diagram provides ...
... showing a relationship between luminosity (or absolute magnitude) and stars' surface temperature (or spectral type). The bottom scale is ranging from high-temperature blue-white stars (left side of the diagram) to low-temperature red stars (right side). The position of a star on the diagram provides ...
WELCOME TO THE MILKY WAY
... the heavenly bodies such as the Sun, the stars and the planets. We deliberately did not follow this approach in this book because imagining all the celestial objects on a dome takes away the depth of field. You will soon understand the celestial motions through your observations in the field. With t ...
... the heavenly bodies such as the Sun, the stars and the planets. We deliberately did not follow this approach in this book because imagining all the celestial objects on a dome takes away the depth of field. You will soon understand the celestial motions through your observations in the field. With t ...
Publications 2003 - Département d`Astrophysique, Géophysique et
... as the results of the analysis of the obtained time series are presented, the main conclusion being that nine stars are thought to be multiperiodic gamma Dor stars and eight monoperiodic. We also performed a photometric mode identification for two stars of the sample by comparing the amplitude ratio ...
... as the results of the analysis of the obtained time series are presented, the main conclusion being that nine stars are thought to be multiperiodic gamma Dor stars and eight monoperiodic. We also performed a photometric mode identification for two stars of the sample by comparing the amplitude ratio ...
Effects of Mutual Transits by Extrasolar Planet
... light curves. We show that, especially for small separation cases, geometrical blocking of one faint object by the other transiting a parent star causes an apparent increase in light curves and characteristic fluctuations appear as an important evidence of mutual transits. We show also that extrasol ...
... light curves. We show that, especially for small separation cases, geometrical blocking of one faint object by the other transiting a parent star causes an apparent increase in light curves and characteristic fluctuations appear as an important evidence of mutual transits. We show also that extrasol ...
Oldest SN
... The site at Burzahom has latitude of about 34 degrees. It is also surrounded by Himalayan foothills, except on the west side. The eastern and northern side particularly have taller mountains with some peaks crossing 4,000 meters. Out of 5 candidates, 3 are in the approximate direction of the centre ...
... The site at Burzahom has latitude of about 34 degrees. It is also surrounded by Himalayan foothills, except on the west side. The eastern and northern side particularly have taller mountains with some peaks crossing 4,000 meters. Out of 5 candidates, 3 are in the approximate direction of the centre ...
The formation of the galaxy is believed to be similar
... can be divided into 2 phases: a spherical gas cloud (halo) collapsed to form the stars in the Milky Way's spheroid, then rapidly rotating gas collapsed into a disk-shaped configuration of stars. Since disk stars have higher metallicity, which is most likely? Gas ejected from the a) spheroid stars en ...
... can be divided into 2 phases: a spherical gas cloud (halo) collapsed to form the stars in the Milky Way's spheroid, then rapidly rotating gas collapsed into a disk-shaped configuration of stars. Since disk stars have higher metallicity, which is most likely? Gas ejected from the a) spheroid stars en ...
mass loss of massive stars - of /proceedings
... Although short, the RSG phase strongly impacts on the neighbouring environment. In that phase, mass loss rates range from 10−7 to 10−4 M and the wind velocities are typically of 10 to 40 km s−1 . Hence, the wind density is about a thousand times larger than in the OB phase. Fig. 2 shows mass loss r ...
... Although short, the RSG phase strongly impacts on the neighbouring environment. In that phase, mass loss rates range from 10−7 to 10−4 M and the wind velocities are typically of 10 to 40 km s−1 . Hence, the wind density is about a thousand times larger than in the OB phase. Fig. 2 shows mass loss r ...
How we know black holes exist
... Using this velocity and the amount of time stars take to complete a full orbit around the center of M87, Gebhardt and colleagues determined that the object at the center of the accretion disk holds some 6.6 billion times our Sun’s mass — that’s more than 1,000 times that of the Milky Way’s central b ...
... Using this velocity and the amount of time stars take to complete a full orbit around the center of M87, Gebhardt and colleagues determined that the object at the center of the accretion disk holds some 6.6 billion times our Sun’s mass — that’s more than 1,000 times that of the Milky Way’s central b ...
Microsoft Word 97
... Our galaxy has several parts: 1) The Nuclear Bulge – Our galaxy has the general shape of a pancake with a bulge at its center that contains millions of stars, primarily old ones. This nuclear bulge has the galactic nucleus at its center. The nucleus itself if only about 10 light-years across. 2) The ...
... Our galaxy has several parts: 1) The Nuclear Bulge – Our galaxy has the general shape of a pancake with a bulge at its center that contains millions of stars, primarily old ones. This nuclear bulge has the galactic nucleus at its center. The nucleus itself if only about 10 light-years across. 2) The ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.