2014 State Test
... Questions A18-A21 use the image below. A18. What object is shown in the optical-light image at right? A. 47 Tucanae C. T Pyxidis B. NGC 3132 D. Vela SNR A19. Of the two stars in the center, the dimmer one is the source of the light that powers the nebula. At a surface temperature of 100,000K, what k ...
... Questions A18-A21 use the image below. A18. What object is shown in the optical-light image at right? A. 47 Tucanae C. T Pyxidis B. NGC 3132 D. Vela SNR A19. Of the two stars in the center, the dimmer one is the source of the light that powers the nebula. At a surface temperature of 100,000K, what k ...
Some interesting geometric facts about eclipsing binaries (see if you
... Some interesting geometric facts about eclipsing binaries (see if you can prove these): The probability of a binary being properly oriented in space for us to observe it as an eclipsing system becomes progressively smaller as the distance between the two stars increases. It turns out that no visual ...
... Some interesting geometric facts about eclipsing binaries (see if you can prove these): The probability of a binary being properly oriented in space for us to observe it as an eclipsing system becomes progressively smaller as the distance between the two stars increases. It turns out that no visual ...
Earth and Stars
... exact value of the stadium (which was not the same at Athens, Alexandria or Rome) is fairly hazy, this puts the terrestrial circumference at 40.000 km. The result is remarkable, although several errors were introduced in the calculations: •The distance between Alexandria and Aswan is 729 km, not 800 ...
... exact value of the stadium (which was not the same at Athens, Alexandria or Rome) is fairly hazy, this puts the terrestrial circumference at 40.000 km. The result is remarkable, although several errors were introduced in the calculations: •The distance between Alexandria and Aswan is 729 km, not 800 ...
What is a star?
... • The sun is a star and is composed mostly of hydrogen and helium. It also contains oxygen, carbon, neon, and iron. • At the center of the sun lies the core, where gases are compressed and heated and temperatures reach 15 million degrees Celsius. • The sun’s core is where matter is converted into ...
... • The sun is a star and is composed mostly of hydrogen and helium. It also contains oxygen, carbon, neon, and iron. • At the center of the sun lies the core, where gases are compressed and heated and temperatures reach 15 million degrees Celsius. • The sun’s core is where matter is converted into ...
The quick brown fox jumps over the lazy dog
... impending event. Initially unconcern - why should I worry about some fireworks near Neptune. Slowly, two suns in the sky forces it to be noticed. Then heat, earthquakes, tidal waves, impossible weather - panic. Story ends on a sobering note that will resonate in some Ray Bradbury stories later: 'The ...
... impending event. Initially unconcern - why should I worry about some fireworks near Neptune. Slowly, two suns in the sky forces it to be noticed. Then heat, earthquakes, tidal waves, impossible weather - panic. Story ends on a sobering note that will resonate in some Ray Bradbury stories later: 'The ...
The Sun and the Stars
... Apparent magnitude : The apparent magnitude (symbol m) is a measure of the stars brightness as seen by an observer on Earth. Scale originally devised by Hipparchus and later Ptolemy. Historically , stars were divided into 6 categories according to their brightness : brightest 1st magnitude, faintest ...
... Apparent magnitude : The apparent magnitude (symbol m) is a measure of the stars brightness as seen by an observer on Earth. Scale originally devised by Hipparchus and later Ptolemy. Historically , stars were divided into 6 categories according to their brightness : brightest 1st magnitude, faintest ...
High Mass Stars
... – From H-R diagram its luminosity is 100000 times greater than the Sun’s. – It therefore burns fuel (uses it’s mass) 100000 times faster than the Sun. – It has 25 times the mass of the Sun so its lifetime will be 25/100000 = 0.00025 times than the Sun’s lifetime = 2.5 million years. ...
... – From H-R diagram its luminosity is 100000 times greater than the Sun’s. – It therefore burns fuel (uses it’s mass) 100000 times faster than the Sun. – It has 25 times the mass of the Sun so its lifetime will be 25/100000 = 0.00025 times than the Sun’s lifetime = 2.5 million years. ...
laboratory 1: digital imaging with ds9
... 3. Measure the peak pixel intensities (values) of the same stars (at least 10 and preferably 30-50 stars) on each pair of images. Note that the gray values of pixels in the “black sky” are not zero – to get a good measure of the brightness of that star, you must subtract the gray value of the sky me ...
... 3. Measure the peak pixel intensities (values) of the same stars (at least 10 and preferably 30-50 stars) on each pair of images. Note that the gray values of pixels in the “black sky” are not zero – to get a good measure of the brightness of that star, you must subtract the gray value of the sky me ...
Lecture 3
... Apparent magnitude : The apparent magnitude (symbol m) is a measure of the stars brightness as seen by an observer on Earth. Scale originally devised by Hipparchus and later Ptolemy. Historically , stars were divided into 6 categories according to their brightness : brightest 1st magnitude, faintest ...
... Apparent magnitude : The apparent magnitude (symbol m) is a measure of the stars brightness as seen by an observer on Earth. Scale originally devised by Hipparchus and later Ptolemy. Historically , stars were divided into 6 categories according to their brightness : brightest 1st magnitude, faintest ...
Slide 1
... The upcoming enhanced UK radio facility e-MERLIN will provide greatly increased sensitivity ( about 3 micro-Jy ) and high spatial resolution (milli-arcsec) observations at 5 GHz (C-band) and 1.6 GHz (L-band) with bandwidths of 2GHz and 0.4 GHz respectively. We are planning a major survey of the trem ...
... The upcoming enhanced UK radio facility e-MERLIN will provide greatly increased sensitivity ( about 3 micro-Jy ) and high spatial resolution (milli-arcsec) observations at 5 GHz (C-band) and 1.6 GHz (L-band) with bandwidths of 2GHz and 0.4 GHz respectively. We are planning a major survey of the trem ...
Nature of Stars 2
... Observatory on the Draper Catalog, mapping and defining all the stars in the sky to photographic magnitude of about 9. Her Henry Draper Catalogue listed nearly 230,000 stars was valued as the work of a single observer. At this time the women astronomers doing this groundbreaking work at Harvard Obse ...
... Observatory on the Draper Catalog, mapping and defining all the stars in the sky to photographic magnitude of about 9. Her Henry Draper Catalogue listed nearly 230,000 stars was valued as the work of a single observer. At this time the women astronomers doing this groundbreaking work at Harvard Obse ...
Star Patterns - Lincoln-Sudbury Regional High School
... dates commonly quoted for “star signs”. In the next Activity, we will investigate why this is so. Another question may have occurred to you: For example, when the Sun is “in” Aquarius, Aquarius can’t be seen because it is up at the same time as the Sun - that is, during the day. So why would ancient ...
... dates commonly quoted for “star signs”. In the next Activity, we will investigate why this is so. Another question may have occurred to you: For example, when the Sun is “in” Aquarius, Aquarius can’t be seen because it is up at the same time as the Sun - that is, during the day. So why would ancient ...
PHYSICS – Astrophysics Section I
... ultraviolet radiation is absorbed by the ozone layer, with some reaching the surface. Almost all visible light reaches the surface of the Earth, although some wavelengths are scattered more easily than others. Infra-red and microwaves are partially absorbed by the atmosphere, and most radio waves ar ...
... ultraviolet radiation is absorbed by the ozone layer, with some reaching the surface. Almost all visible light reaches the surface of the Earth, although some wavelengths are scattered more easily than others. Infra-red and microwaves are partially absorbed by the atmosphere, and most radio waves ar ...
ASTR1010_HW06
... We find large amounts of volatiles only in the outer regions of our Solar System because only beyond the “frost line” at 3.5 AU does it get cold enough for volatiles to ...
... We find large amounts of volatiles only in the outer regions of our Solar System because only beyond the “frost line” at 3.5 AU does it get cold enough for volatiles to ...
Fulltext PDF - Indian Academy of Sciences
... to perish. In other words, it was believed by the ancients that the sun and the stars, the moon and other planets have always been there, and will persist as such till the last gasp of the world. For long centuries it was a tenet that matters celestial were incorruptible, preserving form and stabili ...
... to perish. In other words, it was believed by the ancients that the sun and the stars, the moon and other planets have always been there, and will persist as such till the last gasp of the world. For long centuries it was a tenet that matters celestial were incorruptible, preserving form and stabili ...
Falling Stars
... was and ask others if they saw it, too. Often, no one else sees the speedy flight of light flash by, and you are left trying to describe what you saw and felt. You stare at the dark space, hoping another will streak across the sky. ...
... was and ask others if they saw it, too. Often, no one else sees the speedy flight of light flash by, and you are left trying to describe what you saw and felt. You stare at the dark space, hoping another will streak across the sky. ...
Astronomy Final C - Tarleton State University
... 50. ? are very powerful luminous and very distant galaxies with large redshifts. A. DRAGNs B.Seyfert Galaxies C.Quasars D.Blazars E.all of these are luminous, very distant galaxies with large redshifts 51. Most of the stars in the Milky Way are probably A.Brown Dwarfs B.Red Dwarfs C.White Dwarfs D.N ...
... 50. ? are very powerful luminous and very distant galaxies with large redshifts. A. DRAGNs B.Seyfert Galaxies C.Quasars D.Blazars E.all of these are luminous, very distant galaxies with large redshifts 51. Most of the stars in the Milky Way are probably A.Brown Dwarfs B.Red Dwarfs C.White Dwarfs D.N ...
Time From the Perspective of a Particle Physicist
... • Usually leaves neutron star For high mass stars • fusion continues beyond C,O to Iron • if Mass(core) > 1.4 M(Sun) core collapses in SUPERNOVA (II) • leaves either Neutron Star or Black Hole • Most SN are this type PHYS 162 ...
... • Usually leaves neutron star For high mass stars • fusion continues beyond C,O to Iron • if Mass(core) > 1.4 M(Sun) core collapses in SUPERNOVA (II) • leaves either Neutron Star or Black Hole • Most SN are this type PHYS 162 ...
Sun - Cobb Learning
... The Sun and Its Motions (2) Due to Earth’s revolution around the sun, the sun appears to move through the zodiacal constellations. ...
... The Sun and Its Motions (2) Due to Earth’s revolution around the sun, the sun appears to move through the zodiacal constellations. ...
1 Do Massive Stars Trigger New Waves of Star Formation
... that lead to their formation are still very much unknown. Astronomers also now believe that stars were the first large objects to form in the early universe. Understanding the origins of stars, and thereby the origins of galaxies and also planets, is one of the major contemporary research areas in a ...
... that lead to their formation are still very much unknown. Astronomers also now believe that stars were the first large objects to form in the early universe. Understanding the origins of stars, and thereby the origins of galaxies and also planets, is one of the major contemporary research areas in a ...
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.