Characteristics of Main Sequence Stars
... nuclear reactions in high mass stars are generally confined to a very small region, much smaller than the size of the convective core. • As the stellar mass increases, so does the size of the convective core (due again to the large increase in ² with temperature). Supermassive stars with M ∼ 100M¯ w ...
... nuclear reactions in high mass stars are generally confined to a very small region, much smaller than the size of the convective core. • As the stellar mass increases, so does the size of the convective core (due again to the large increase in ² with temperature). Supermassive stars with M ∼ 100M¯ w ...
Properties of Stars - Indiana State University
... – 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 – Therefore, as one moves right on the H-R diagram, a star’s radius must increase – The net effect of this is that the smal ...
... – 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 – Therefore, as one moves right on the H-R diagram, a star’s radius must increase – The net effect of this is that the smal ...
Sun - Midlandstech
... be close to one another. Usually, this is only a projection effect. The stars of a constellation may be located at very different distances from us. ...
... be close to one another. Usually, this is only a projection effect. The stars of a constellation may be located at very different distances from us. ...
Sample pages 2 PDF
... telescope have been observed every few hundred years by humans and were recorded as long ago as 1054 by Chinese astronomers. Many more supernovae are observed, in our own and other galaxies, with telescopes. (There are two types of supernovae. This is a description of type II supernovae. Type I supe ...
... telescope have been observed every few hundred years by humans and were recorded as long ago as 1054 by Chinese astronomers. Many more supernovae are observed, in our own and other galaxies, with telescopes. (There are two types of supernovae. This is a description of type II supernovae. Type I supe ...
Stellar Evolution Guiding Questions Stars Evolve
... • Newborn stars may form a star cluster • Stars are held together in such a cluster by gravity • Occasionally a star moving more rapidly than average will escape from such a cluster • A stellar association is a group of newborn stars that are moving apart so rapidly that their gravitational attracti ...
... • Newborn stars may form a star cluster • Stars are held together in such a cluster by gravity • Occasionally a star moving more rapidly than average will escape from such a cluster • A stellar association is a group of newborn stars that are moving apart so rapidly that their gravitational attracti ...
Space Interactive Internet Scavenger Hunt
... discovered, making it only a hypothetical possibility. Scientists believe it would take a star such as the sun over 14 billion years to reach the black dwarf stage, a period of time greater than the estimated age of the universe. If black dwarfs were to exist they would be invisible and scientists c ...
... discovered, making it only a hypothetical possibility. Scientists believe it would take a star such as the sun over 14 billion years to reach the black dwarf stage, a period of time greater than the estimated age of the universe. If black dwarfs were to exist they would be invisible and scientists c ...
Star Formation - University of Redlands
... a. it is hot and things that are hot glow red. b. it is ionized hydrogen which appears red because the brightest emission line is red. c. it is cold and things that are cold appear red. d. it is full of red stars. e. dust between the observer and the region blocks the blue light, but lets the red li ...
... a. it is hot and things that are hot glow red. b. it is ionized hydrogen which appears red because the brightest emission line is red. c. it is cold and things that are cold appear red. d. it is full of red stars. e. dust between the observer and the region blocks the blue light, but lets the red li ...
PowerPoint - Chandra X
... High resolution observations revealed the existence of soft (kT ~ 0.24 keV) point source of X-rays -presumably a neutron star-- embedded in a nebula of cometary morphology within the supernova remnant. Interpreting the cometary nebula as due to a pulsar wind with a bow shock due to its motion throug ...
... High resolution observations revealed the existence of soft (kT ~ 0.24 keV) point source of X-rays -presumably a neutron star-- embedded in a nebula of cometary morphology within the supernova remnant. Interpreting the cometary nebula as due to a pulsar wind with a bow shock due to its motion throug ...
NEUTRON STAR?
... Telescope Observing Night • We will be holding an optional observing night this coming Tuesday, Nov. 8th from 7-9 p.m. on the Science Center roof. We'll be looking at Mars, stellar clusters, binary stars, and more... • Because we live in lovely cloudy Boston, we have to prepare for inclement weather ...
... Telescope Observing Night • We will be holding an optional observing night this coming Tuesday, Nov. 8th from 7-9 p.m. on the Science Center roof. We'll be looking at Mars, stellar clusters, binary stars, and more... • Because we live in lovely cloudy Boston, we have to prepare for inclement weather ...
Diffuse Ultraviolet Emission in Galaxies
... P Cygni’s spectrum is quite unlike that of most stars. Typically, a stellar spectrum will feature numerous dark “absorption” lines, which are produced by atoms in its outer layers absorbing certain wavelengths of light emitted from below. A star’s spectrum may also exhibit bright “emission” lines—th ...
... P Cygni’s spectrum is quite unlike that of most stars. Typically, a stellar spectrum will feature numerous dark “absorption” lines, which are produced by atoms in its outer layers absorbing certain wavelengths of light emitted from below. A star’s spectrum may also exhibit bright “emission” lines—th ...
Magnitude. . . ?
... reads that “the minor planet was of fifteenth brightness class”, i.e., that its faintness was approximately fifteen magnitudes, one understands that it was some one million times fainter than Vega, or than a fixed star of zero-th brightness class (fifteen is three times five, and the third power of ...
... reads that “the minor planet was of fifteenth brightness class”, i.e., that its faintness was approximately fifteen magnitudes, one understands that it was some one million times fainter than Vega, or than a fixed star of zero-th brightness class (fifteen is three times five, and the third power of ...
Neutron Stars
... more than 4.6 billion years ago, whose remains were swept up into the solar system when the Sun formed ...
... more than 4.6 billion years ago, whose remains were swept up into the solar system when the Sun formed ...
Black Hole Sun: A Total Eclipse Free Public Lecture about Eclipses
... We are interpreting E. C. Pickering’s (A. J. Cannon’s boss) spectra of Mizar (a star in the Big Dipper) in 1889. How can the spectral line of hydrogen appear at different wavelengths? A. The star is moving. B. Hydrogen emits at different wavelengths at different times. C. There was something wrong w ...
... We are interpreting E. C. Pickering’s (A. J. Cannon’s boss) spectra of Mizar (a star in the Big Dipper) in 1889. How can the spectral line of hydrogen appear at different wavelengths? A. The star is moving. B. Hydrogen emits at different wavelengths at different times. C. There was something wrong w ...
ph507lecnote06
... Nearby stars: main-sequence appears. Most stars are less luminous and cooler than the Sun (alpha Centauri, nearest to us and a triple system, is similar). Note the hot small stars: the white dwarfs. ...
... Nearby stars: main-sequence appears. Most stars are less luminous and cooler than the Sun (alpha Centauri, nearest to us and a triple system, is similar). Note the hot small stars: the white dwarfs. ...
description
... so the direction you are facing is on the bottom. The constellations in the sky will match the constellations on the map.” See if they notice that north and south on their maps don’t line up with the directions on the wall. Now, tell the students to swing their maps up over their head, so they are n ...
... so the direction you are facing is on the bottom. The constellations in the sky will match the constellations on the map.” See if they notice that north and south on their maps don’t line up with the directions on the wall. Now, tell the students to swing their maps up over their head, so they are n ...
July - Westchester Amateur Astronomers
... the Sun will rise half-eclipsed and decreasing. The next total solar eclipse for NYC occurs at sunrise on May 1st, 2079. I’d suggest trying for a cruise to a total eclipse or waiting for the one in the Carolinas in 2017 or western New York State in 2024! Saturn is getting lower in the southwest each ...
... the Sun will rise half-eclipsed and decreasing. The next total solar eclipse for NYC occurs at sunrise on May 1st, 2079. I’d suggest trying for a cruise to a total eclipse or waiting for the one in the Carolinas in 2017 or western New York State in 2024! Saturn is getting lower in the southwest each ...
Stars - Mike Brotherton
... Polaris has just about the same spectral type (and thus surface temperature) as our sun, but it is 10,000 times brighter than our sun. Thus, Polaris is 100 times larger than the sun. This causes its luminosity to be 1002 = 10,000 times more than our sun’s. ...
... Polaris has just about the same spectral type (and thus surface temperature) as our sun, but it is 10,000 times brighter than our sun. Thus, Polaris is 100 times larger than the sun. This causes its luminosity to be 1002 = 10,000 times more than our sun’s. ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.