Nebula
... Some nebulae are formed as the result of supernova explosions, the death throes of massive, short-lived stars. The material thrown off from the supernova explosion is ionised by the supernova remnant. One of the best examples of this is the Crab Nebula, in Taurus. It is the result of a recorded sup ...
... Some nebulae are formed as the result of supernova explosions, the death throes of massive, short-lived stars. The material thrown off from the supernova explosion is ionised by the supernova remnant. One of the best examples of this is the Crab Nebula, in Taurus. It is the result of a recorded sup ...
Recipe for a Star
... Make a black hole. If the remaining mass at the core is great enough, the core of a neutron star can collapse even further. After blowing away much of the star during the massive-star supernova, the remaining mass of the neutron star collapses to a black hole. These bizarre objects are areas in spac ...
... Make a black hole. If the remaining mass at the core is great enough, the core of a neutron star can collapse even further. After blowing away much of the star during the massive-star supernova, the remaining mass of the neutron star collapses to a black hole. These bizarre objects are areas in spac ...
the article as PDF - Project VS
... VV Cephei eclipsing binary systems offer the most detailed method of studying mass loss from cool supergiant stars. The long-period of VV Cephei gives it a unique place among eclipsing binaries, but 20.4 years between eclipses make it really hard for scientists to study the system. Such a long inter ...
... VV Cephei eclipsing binary systems offer the most detailed method of studying mass loss from cool supergiant stars. The long-period of VV Cephei gives it a unique place among eclipsing binaries, but 20.4 years between eclipses make it really hard for scientists to study the system. Such a long inter ...
Stars and Planets - The University of Texas at Dallas
... Stars, like people, change as they age. While on the main sequence, a star’s color is directly related to its mass. Once a star runs out of hydrogen fuel in its core, however, everything changes! Stars will “evolve” off the main sequence with great changes in size, surface temperature, and luminosit ...
... Stars, like people, change as they age. While on the main sequence, a star’s color is directly related to its mass. Once a star runs out of hydrogen fuel in its core, however, everything changes! Stars will “evolve” off the main sequence with great changes in size, surface temperature, and luminosit ...
printer-friendly version of benchmark
... far as 2000 light years (http://www.uwgb.edu/dutchs/CosmosNotes/distance.htm). Figure 4 is a chart of some of the nearest stars to Earth. After the Sun, Proxima Centauri is closest to Earth at 4.2 light years. Dividing this value by the distance between Earth and Sun (4.2 light years / 1.58 x 10-5 l ...
... far as 2000 light years (http://www.uwgb.edu/dutchs/CosmosNotes/distance.htm). Figure 4 is a chart of some of the nearest stars to Earth. After the Sun, Proxima Centauri is closest to Earth at 4.2 light years. Dividing this value by the distance between Earth and Sun (4.2 light years / 1.58 x 10-5 l ...
Star Location, Constellations and Intro to Solar System 1
... • Stars “move” East to West over the course of one Night (in circle about the North Star) • Stars “move” East to West by 2 hours per month and “return” to the same position after one Year • It’s just caused by Earth’s daily spin and yearly orbit about the Sun • Star wheel depends on latitude: northe ...
... • Stars “move” East to West over the course of one Night (in circle about the North Star) • Stars “move” East to West by 2 hours per month and “return” to the same position after one Year • It’s just caused by Earth’s daily spin and yearly orbit about the Sun • Star wheel depends on latitude: northe ...
star - Cloudfront.net
... H. Final Stages of Massive Stars 1. Novas and Supernovas a. Stars that are larger than our sun leave the red supergiant stage of their life and enter the nova/supernova stage. b. A nova is a large explosion of the star which is caused by the increase pressure of the star as it converts helium into ...
... H. Final Stages of Massive Stars 1. Novas and Supernovas a. Stars that are larger than our sun leave the red supergiant stage of their life and enter the nova/supernova stage. b. A nova is a large explosion of the star which is caused by the increase pressure of the star as it converts helium into ...
HR DIAGRAMS OF STAR CLUSTERS
... areas---their radii can be a thousand times bigger than the sun. These are called red giants. Stars at the lower left of the diagram are exceptionally faint even though they are very hot, so they must be small---their radii are typically a hundred times smaller than the sun, or about the size of the ...
... areas---their radii can be a thousand times bigger than the sun. These are called red giants. Stars at the lower left of the diagram are exceptionally faint even though they are very hot, so they must be small---their radii are typically a hundred times smaller than the sun, or about the size of the ...
hr diagrams of star clusters
... areas---their radii can be a thousand times bigger than the sun. These are called red giants. Stars at the lower left of the diagram are exceptionally faint even though they are very hot, so they must be small---their radii are typically a hundred times smaller than the sun, or about the size of the ...
... areas---their radii can be a thousand times bigger than the sun. These are called red giants. Stars at the lower left of the diagram are exceptionally faint even though they are very hot, so they must be small---their radii are typically a hundred times smaller than the sun, or about the size of the ...
THE PERIOD OF ROTATION OF THE SUN
... areas---their radii can be a thousand times bigger than the sun. These are called red giants. Stars at the lower left of the diagram are exceptionally faint even though they are very hot, so they must be small---their radii are typically a hundred times smaller than the sun, or about the size of the ...
... areas---their radii can be a thousand times bigger than the sun. These are called red giants. Stars at the lower left of the diagram are exceptionally faint even though they are very hot, so they must be small---their radii are typically a hundred times smaller than the sun, or about the size of the ...
Measuring the Earth`s Diameter
... This is an easily measurable effect and depends solely on the sharpness of the curvature of the Earth's surface, which is related to the radius of the Earth. This effect, therefore, can be used to measure the size of the Earth. This was realized by an Egyptian astronomer named Eratosthenes about 200 ...
... This is an easily measurable effect and depends solely on the sharpness of the curvature of the Earth's surface, which is related to the radius of the Earth. This effect, therefore, can be used to measure the size of the Earth. This was realized by an Egyptian astronomer named Eratosthenes about 200 ...
Size of the Earth
... This is an easily measurable effect and depends solely on the sharpness of the curvature of the Earth's surface, which is related to the radius of the Earth. This effect, therefore, can be used to measure the size of the Earth. This was realized by an Egyptian astronomer named Eratosthenes about 200 ...
... This is an easily measurable effect and depends solely on the sharpness of the curvature of the Earth's surface, which is related to the radius of the Earth. This effect, therefore, can be used to measure the size of the Earth. This was realized by an Egyptian astronomer named Eratosthenes about 200 ...
PHYS3380_110215_bw - The University of Texas at Dallas
... hydrogen into helium occurs via CNO cycle instead of the proton-proton chain. The CNO process is very temperature sensitive, so the core is very hot but the temperature falls off rapidly. Therefore, the core region forms a convection zone that uniformly mixes the hydrogen fuel with the helium produc ...
... hydrogen into helium occurs via CNO cycle instead of the proton-proton chain. The CNO process is very temperature sensitive, so the core is very hot but the temperature falls off rapidly. Therefore, the core region forms a convection zone that uniformly mixes the hydrogen fuel with the helium produc ...
MAGNITUDE AND COLOR SYSTEMS
... professional astronomers because there is not one magnitude system but instead several. For historical reasons within subfields, the definitions differ in two ways: (1) The spectral flux density can be expressed either as fν (ν) or fλ (λ). (2) The normalizing constant Q(i) differs among the systems; ...
... professional astronomers because there is not one magnitude system but instead several. For historical reasons within subfields, the definitions differ in two ways: (1) The spectral flux density can be expressed either as fν (ν) or fλ (λ). (2) The normalizing constant Q(i) differs among the systems; ...
Here
... • To get an understanding of how a star works, the most useful thing to do is to measure the spectral energy distribution, which is a plot of the intensity of the photons vs. their wavelengths (or frequencies or energies). • There are two ways to do this: “Broad band”, by taking images with a came ...
... • To get an understanding of how a star works, the most useful thing to do is to measure the spectral energy distribution, which is a plot of the intensity of the photons vs. their wavelengths (or frequencies or energies). • There are two ways to do this: “Broad band”, by taking images with a came ...
Dec 2016 - Astronomical Society of Northern New England
... Even in December, when Pisces rides high in the south when evening darkness has set in, this face-on spiral galaxy is difficult to view. During Messier Marathon time in mid to late March, M74 is all but lost as it sets in the glow of evening twilight. What makes M74 such a challenge is its low surfa ...
... Even in December, when Pisces rides high in the south when evening darkness has set in, this face-on spiral galaxy is difficult to view. During Messier Marathon time in mid to late March, M74 is all but lost as it sets in the glow of evening twilight. What makes M74 such a challenge is its low surfa ...
Searching for stars in high-velocity clouds
... estimated by using gas absorption features in stars presumed to be behind and in front of the clouds (Keenan et al. 1995; van Woerden et al. 1999; Wakker 2001), by using absorption features in distant quasars (Sembach et al. 2002) and by measuring the Hα flux arising from the presumed ionization by ...
... estimated by using gas absorption features in stars presumed to be behind and in front of the clouds (Keenan et al. 1995; van Woerden et al. 1999; Wakker 2001), by using absorption features in distant quasars (Sembach et al. 2002) and by measuring the Hα flux arising from the presumed ionization by ...
The Extragalactic Distance Database: Color–Magnitude Diagrams
... of observations other than those used for the production of the galaxy’s CMD often appear in these images, but those that are used are always highlighted in yellow. In order to reduce the clutter caused by the necessity of showing these unused observations we only show the footprints of one instrume ...
... of observations other than those used for the production of the galaxy’s CMD often appear in these images, but those that are used are always highlighted in yellow. In order to reduce the clutter caused by the necessity of showing these unused observations we only show the footprints of one instrume ...
Stellar Physics - Craigie High School
... The gravitational attraction of the Earth is what is responsible for the moon's circular motion round the Earth. Thus the observed central acceleration can be calculated from measurements of ...
... The gravitational attraction of the Earth is what is responsible for the moon's circular motion round the Earth. Thus the observed central acceleration can be calculated from measurements of ...
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.