After the ZAMS - Lincoln-Sudbury Regional High School
... The Universe simply isn’t old enough for many very low mass stars to have made it onto the main sequence, let alone off it! This slowness is however of great benefit to us on Earth, with a Sun which has evolved not terribly fast. ...
... The Universe simply isn’t old enough for many very low mass stars to have made it onto the main sequence, let alone off it! This slowness is however of great benefit to us on Earth, with a Sun which has evolved not terribly fast. ...
Stars, Galaxies, and the Universe Section 1 Section 1
... • Most stars have several types of actual motion. • Stars move across the sky (seen only for close stars). • Some stars may revolve around another star. • Stars either move away from or toward our solar system. ...
... • Most stars have several types of actual motion. • Stars move across the sky (seen only for close stars). • Some stars may revolve around another star. • Stars either move away from or toward our solar system. ...
Chapter 12
... • Most stars lie on the main sequence – Of these, the hottest stars are blue and more luminous, while the coolest stars are red and dim – Star’s position on sequence determines its mass, being more near the top of the sequence ...
... • Most stars lie on the main sequence – Of these, the hottest stars are blue and more luminous, while the coolest stars are red and dim – Star’s position on sequence determines its mass, being more near the top of the sequence ...
Astrophysics notes
... Produced by a cool, non-luminous gas in front of a continuous spectrum source. ...
... Produced by a cool, non-luminous gas in front of a continuous spectrum source. ...
Autumn Asterisms for binoculars 2013
... The Aeroplane actually looks like its intended name, and appears to be dive-bombing M52! It’s alternative name is the Arrow, but I think the former is better. Images reveal red and blue wing tips and a red tail. Cassiopeia: Kemble’s Kite Fr. Kemble was a prolific binocular observer, so it is no ...
... The Aeroplane actually looks like its intended name, and appears to be dive-bombing M52! It’s alternative name is the Arrow, but I think the former is better. Images reveal red and blue wing tips and a red tail. Cassiopeia: Kemble’s Kite Fr. Kemble was a prolific binocular observer, so it is no ...
Stars and Their Characteristics
... Answer: d = 1 / p d = 1/ (0.1) = 10 parsecs = 3.2 light years ...
... Answer: d = 1 / p d = 1/ (0.1) = 10 parsecs = 3.2 light years ...
Stars (Ch. 13)
... • But as we already know we can learn a lot from light! • Light can tell us about a star’s: ...
... • But as we already know we can learn a lot from light! • Light can tell us about a star’s: ...
Luminosity - U of L Class Index
... • What is the significance of the main sequence? Normal stars that fuse H to He in their cores fall on the main sequence of an H-R diagram A star’s mass determines its position along the main sequence (high-mass: luminous and blue; low-mass: faint and red) ...
... • What is the significance of the main sequence? Normal stars that fuse H to He in their cores fall on the main sequence of an H-R diagram A star’s mass determines its position along the main sequence (high-mass: luminous and blue; low-mass: faint and red) ...
Masses are much harder than distance, luminosity, or temperature
... • Range of different mass stars! ...
... • Range of different mass stars! ...
S T A R S
... Alpha Centauri is the closest binary to our sun and Proxima Centauri orbits this binary. Omega Centauri (NGC 5139) is globular cluster. The two pointers Apha & Beta Centauri point to Crux. (NGC is the abbreviation for New General Catalogue which is a listing of star clusters, nebulae and galaxies.) ...
... Alpha Centauri is the closest binary to our sun and Proxima Centauri orbits this binary. Omega Centauri (NGC 5139) is globular cluster. The two pointers Apha & Beta Centauri point to Crux. (NGC is the abbreviation for New General Catalogue which is a listing of star clusters, nebulae and galaxies.) ...
Ch13_Lecture - Chemistry at Winthrop University
... • Most stars lie on the main sequence – Of these, the hottest stars are blue and more luminous, while the coolest stars are red and dim – Star’s position on sequence determines its mass, being more near the top of the sequence ...
... • Most stars lie on the main sequence – Of these, the hottest stars are blue and more luminous, while the coolest stars are red and dim – Star’s position on sequence determines its mass, being more near the top of the sequence ...
1/20/09 301 Physics Chapter 12 The Family of Stars Triangulation
... – 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 – Therefore, as one moves right on the ...
... – 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 – Therefore, as one moves right on the ...
Stars, Galaxies, and the Universe Section 1 Distances to Stars
... • Most stars have several types of actual motion. • Stars move across the sky (seen only for close stars). • Some stars may revolve around another star. • Stars either move away from or toward our solar system. ...
... • Most stars have several types of actual motion. • Stars move across the sky (seen only for close stars). • Some stars may revolve around another star. • Stars either move away from or toward our solar system. ...
1 Stars
... • Stars are classified by color and temperature. The most common system uses the letters O (blue), B (bluewhite), A (white), F (yellow-white), G (yellow), K (orange), and M (red), from hottest to coolest. • Stars form from clouds of gas and dust called nebulas. Nebulas collapse until nuclear fusion ...
... • Stars are classified by color and temperature. The most common system uses the letters O (blue), B (bluewhite), A (white), F (yellow-white), G (yellow), K (orange), and M (red), from hottest to coolest. • Stars form from clouds of gas and dust called nebulas. Nebulas collapse until nuclear fusion ...
What we can measure
... the area. We can see that many if not most of the stars do fall on the predicted line. We’ll call this predicted line the “Main Sequence”. There are significant number of stars that fall below the Main Sequence. Since they have lower luminosities than their temperature would normally suggest, we inf ...
... the area. We can see that many if not most of the stars do fall on the predicted line. We’ll call this predicted line the “Main Sequence”. There are significant number of stars that fall below the Main Sequence. Since they have lower luminosities than their temperature would normally suggest, we inf ...
Celestial Distances
... In contrast, most stars are constant in their luminosity (at least within a percent or two) ...
... In contrast, most stars are constant in their luminosity (at least within a percent or two) ...
Color-Magnitude Diagram Lab Manual
... display drifts slightly to the right. This is because the Earths rotation shifts the position of stars in the night sky. To compensate for this, turn on the tracking motor by clicking the Tracking button. The tracking motor is built into telescopes to compensate for the Earths rotation, so that an o ...
... display drifts slightly to the right. This is because the Earths rotation shifts the position of stars in the night sky. To compensate for this, turn on the tracking motor by clicking the Tracking button. The tracking motor is built into telescopes to compensate for the Earths rotation, so that an o ...
The Abundances of the Fe Group Elements in Three Early B Stars in
... but in NGC 8181-D1 we find C/N∼0.20 dex. The elevated abundance of nitrogen relative to carbon suggests that CNO-processed material from the star’s core (first dredge-up) may have mixed with the original pristine photospheric material. Or perhaps the star has undergone mass transfer from a close com ...
... but in NGC 8181-D1 we find C/N∼0.20 dex. The elevated abundance of nitrogen relative to carbon suggests that CNO-processed material from the star’s core (first dredge-up) may have mixed with the original pristine photospheric material. Or perhaps the star has undergone mass transfer from a close com ...
July 2014 BRAS Newsletter - The Baton Rouge Astronomical Society
... First, they narrowed their search in the Kepler data to 42,557 stars of spectral classes G (yellow) and K (orange), with surface temperatures of 4,100 K to 6,100 K bracketing the Sun’s 5,770 K, and masses ranging from 0.6 to 1.1 times the Sun’s. Then, with the aid of custom-built software called TER ...
... First, they narrowed their search in the Kepler data to 42,557 stars of spectral classes G (yellow) and K (orange), with surface temperatures of 4,100 K to 6,100 K bracketing the Sun’s 5,770 K, and masses ranging from 0.6 to 1.1 times the Sun’s. Then, with the aid of custom-built software called TER ...
The Sky
... • The ancient astronomers divided the stars into six classes. – The brightest were called first-magnitude stars and those that were fainter, second-magnitude. The scale continued downward to sixth-magnitude stars, the faintest visible to the human eye. – Thus, the larger the magnitude number, the fa ...
... • The ancient astronomers divided the stars into six classes. – The brightest were called first-magnitude stars and those that were fainter, second-magnitude. The scale continued downward to sixth-magnitude stars, the faintest visible to the human eye. – Thus, the larger the magnitude number, the fa ...
Warm-Up Monday, July 23, 2012
... • A. The stars of Orion are closer together in space. • B. The stars in Orion orbit the Sun, just like the planets. • C. The brightest stars in Orion are the ones that are closest to us. • D. You can’t tell if the brightest stars in Orion are really brighter than the others, or if they are just clos ...
... • A. The stars of Orion are closer together in space. • B. The stars in Orion orbit the Sun, just like the planets. • C. The brightest stars in Orion are the ones that are closest to us. • D. You can’t tell if the brightest stars in Orion are really brighter than the others, or if they are just clos ...
Plotting Supernova Light Curves
... For stars with masses of more than 15 times the mass of the Sun, their lives end in a violent explosion called a supernova. Nuclear fusion stops in the core of the star, which then collapses and bounces back outwards, ejecting most of its matter into space. During this explosion, the star increases ...
... For stars with masses of more than 15 times the mass of the Sun, their lives end in a violent explosion called a supernova. Nuclear fusion stops in the core of the star, which then collapses and bounces back outwards, ejecting most of its matter into space. During this explosion, the star increases ...
Constellations activities (PDF 185KB)
... throughout the year. The constellation of Orion can be seen during summer evenings and the constellation of Scorpius is in the sky during winter evenings. Orion is found low in the eastern sky from December, sits overhead throughout February, and sinks low in the western sky come April. Scorpius ...
... throughout the year. The constellation of Orion can be seen during summer evenings and the constellation of Scorpius is in the sky during winter evenings. Orion is found low in the eastern sky from December, sits overhead throughout February, and sinks low in the western sky come April. Scorpius ...
Canis Minor
Canis Minor /ˌkeɪnɨs ˈmaɪnər/ is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for ""lesser dog"", in contrast to Canis Major, the ""greater dog""; both figures are commonly represented as following the constellation of Orion the hunter.Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the seventh-brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-magnitude red dwarf and the Solar System's next closest stellar neighbour in the constellation after Procyon. The fourth-magnitude HD 66141, which has evolved into an orange giant towards the end of its life cycle, was discovered to have a planet in 2012. There are two faint deep sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December.