Stellar Evolution - University of California, Santa Cruz
... • It is clear that larger dense molecular clouds fragment as they collapse. Exactly how this occurs is not well understood. • Stars form in clusters ...
... • It is clear that larger dense molecular clouds fragment as they collapse. Exactly how this occurs is not well understood. • Stars form in clusters ...
13 The Family of Stars
... Brightest stars: 1st magnitude (mV = 1) Faintest stars (unaided eye): 6th magnitude (mV = 6) In the 19th century, it was found that: 1 mV stars appear ~100 times brighter than 6 mV stars and the scale is logarithmic It was then defined that 1 mV difference gives a factor of 2.512 in apparent ...
... Brightest stars: 1st magnitude (mV = 1) Faintest stars (unaided eye): 6th magnitude (mV = 6) In the 19th century, it was found that: 1 mV stars appear ~100 times brighter than 6 mV stars and the scale is logarithmic It was then defined that 1 mV difference gives a factor of 2.512 in apparent ...
How to watch the Perseid meteor shower
... in or are close to the UK you will be in for a treat during the Perseid meteor shower in 2013 as the International Space Station is visible over UK skies. This orbital laboratory is the size of a football pitch, travels at 1,7500 mph and is around 200 miles up! It orbits the Earth every 90 minutes a ...
... in or are close to the UK you will be in for a treat during the Perseid meteor shower in 2013 as the International Space Station is visible over UK skies. This orbital laboratory is the size of a football pitch, travels at 1,7500 mph and is around 200 miles up! It orbits the Earth every 90 minutes a ...
Measuring Stellar Distances
... http://homework.uoregon.edu/pub/tycho.html - When you first open the simulator you can see a very small movement of the star but the movement of that star is still confined to one detector element. Actual movement can not be detected until the star moves from one detector element (e.g. a pixel) to t ...
... http://homework.uoregon.edu/pub/tycho.html - When you first open the simulator you can see a very small movement of the star but the movement of that star is still confined to one detector element. Actual movement can not be detected until the star moves from one detector element (e.g. a pixel) to t ...
Lab 6
... Astronomers, including Edwin Hubble, began to use the Hertzsprung-Russell diagram as a powerful tool to determine stellar properties. Initially, the method of standard candles for individual stars was applied to whole clusters within the Milky Way; this method relies on the inverse-square law you sa ...
... Astronomers, including Edwin Hubble, began to use the Hertzsprung-Russell diagram as a powerful tool to determine stellar properties. Initially, the method of standard candles for individual stars was applied to whole clusters within the Milky Way; this method relies on the inverse-square law you sa ...
Space Explorations - Holy Cross Collegiate
... • Astronomers refract the light from distant stars to determine what the star is made of. Stars have dark bands in distinct sequences and thicknesses on their spectra. • Each element that is present in the star creates its own black-line ‘fingerprint’. • The spectra of the stars are then compared to ...
... • Astronomers refract the light from distant stars to determine what the star is made of. Stars have dark bands in distinct sequences and thicknesses on their spectra. • Each element that is present in the star creates its own black-line ‘fingerprint’. • The spectra of the stars are then compared to ...
Slide 1
... The Chandrasekhar Limit More than half of all star systems are binaries or multiple stars. In many cases, the stars are so close that mass transfer can occur. If mass from a red giant flows onto a white dwarf, explosive brightness changes of 10000× occur (novae), to 150,000 L. So much matter can f ...
... The Chandrasekhar Limit More than half of all star systems are binaries or multiple stars. In many cases, the stars are so close that mass transfer can occur. If mass from a red giant flows onto a white dwarf, explosive brightness changes of 10000× occur (novae), to 150,000 L. So much matter can f ...
about Stars
... • Astronomers quantify the “color” of a star by using the difference in brightness between the brightness in the B and V spectral regions • The B-V color is related to the slope of the ...
... • Astronomers quantify the “color” of a star by using the difference in brightness between the brightness in the B and V spectral regions • The B-V color is related to the slope of the ...
Astronomy Assignment #1
... with a diameter of 1.23 solar diameters. Alpha Centauri B is (60/85) = 0.706 times smaller than Alpha Centauri A. based on the ratio of their angular sizes (and the fact that they are at the same distance). So Alpha Centauri B is slightly smaller than the Sun with a diameter of 0.867 solar diameters ...
... with a diameter of 1.23 solar diameters. Alpha Centauri B is (60/85) = 0.706 times smaller than Alpha Centauri A. based on the ratio of their angular sizes (and the fact that they are at the same distance). So Alpha Centauri B is slightly smaller than the Sun with a diameter of 0.867 solar diameters ...
1b91: answers to problem sheet no 1
... The maximum in the flux distribution of a white dwarf star and a red giant star occurs at 30 nm and 1500 nm, respectively. If their corresponding radii are 106 m and 1011 m, determine their stellar temperatures and the ratio of their luminosities. Using Wien’s law, λmax = (3 x 106)/T, then the tempe ...
... The maximum in the flux distribution of a white dwarf star and a red giant star occurs at 30 nm and 1500 nm, respectively. If their corresponding radii are 106 m and 1011 m, determine their stellar temperatures and the ratio of their luminosities. Using Wien’s law, λmax = (3 x 106)/T, then the tempe ...
THE GALACTIC GAZETTE The Astronomical Society of Southern New England Next Meeting
... sites by offering travel and other grants, co-sponsoring conferences, and drawing attention to the world-class resources for computational astronomy within the University of California system. More information appears at http://hipacc.ucsc.edu . ...
... sites by offering travel and other grants, co-sponsoring conferences, and drawing attention to the world-class resources for computational astronomy within the University of California system. More information appears at http://hipacc.ucsc.edu . ...
Document
... • We can see X-rays from black holes because? a. X-rays are more energetic than visible light and so can escape from the event horizon. b. X-rays can pass through ordinary matter showing us things we can’t normally see. c. Light given off by objects as they enter the event horizon are gravitationall ...
... • We can see X-rays from black holes because? a. X-rays are more energetic than visible light and so can escape from the event horizon. b. X-rays can pass through ordinary matter showing us things we can’t normally see. c. Light given off by objects as they enter the event horizon are gravitationall ...
Ch. 15 Notes
... – Easily identifiable by the three stars of his belt during the fall and winter – Betelgeuse, the hunter’s right shoulder, is a red supergiant star. If it was in our sun’s place it would extend to the orbit of Jupiter. It will explode in a supernova explosion sometime in the next 1000 years. When th ...
... – Easily identifiable by the three stars of his belt during the fall and winter – Betelgeuse, the hunter’s right shoulder, is a red supergiant star. If it was in our sun’s place it would extend to the orbit of Jupiter. It will explode in a supernova explosion sometime in the next 1000 years. When th ...
Nobel Prize in Physics for Accelerating Universe
... water similar to the water we find on Earth. • “Similar” means that the fraction of heavy water is same as in our oceans. • Heavy water is D2O instead of H2O, where D is deuterium which has a nucleus with one proton and one neutron. • The comet comes from the Kupier belt (30-50 AU) while most comets ...
... water similar to the water we find on Earth. • “Similar” means that the fraction of heavy water is same as in our oceans. • Heavy water is D2O instead of H2O, where D is deuterium which has a nucleus with one proton and one neutron. • The comet comes from the Kupier belt (30-50 AU) while most comets ...
New York City Disciple Code - EarthSpaceScience-Keller
... Either luminosity or never empty. And the spectral class are spectral class is included for most star missing completely Waiter has the ability to know when we want tostages check Most stages include athem Most are missing a description of the description of their core in and when core we want to be ...
... Either luminosity or never empty. And the spectral class are spectral class is included for most star missing completely Waiter has the ability to know when we want tostages check Most stages include athem Most are missing a description of the description of their core in and when core we want to be ...
Concise pioneers of astronomy
... astronomer. He lived between 1738-1822. He built high magnification telescopes that let him observe the heavens with greater detail. Herschel discovered the planet Uranus and advanced our understanding of nebulae, the hazy clouds that surround dying stars. He also founded stellar astronomy, the stud ...
... astronomer. He lived between 1738-1822. He built high magnification telescopes that let him observe the heavens with greater detail. Herschel discovered the planet Uranus and advanced our understanding of nebulae, the hazy clouds that surround dying stars. He also founded stellar astronomy, the stud ...
Morning Announcements
... Low/Average Mass- Nebula-Protostar-Main Sequence Star (color must be accurate)- GiantPlanetary Nebula- White Dwarf Massive Star- Nebula-Protostar- Main Sequence Star (color must be accurate) - Super GiantSupernova-Neutron Star Very Massive Star-Nebula-Protostar-Main Sequence Star (color must be accu ...
... Low/Average Mass- Nebula-Protostar-Main Sequence Star (color must be accurate)- GiantPlanetary Nebula- White Dwarf Massive Star- Nebula-Protostar- Main Sequence Star (color must be accurate) - Super GiantSupernova-Neutron Star Very Massive Star-Nebula-Protostar-Main Sequence Star (color must be accu ...
Colour-magnitude diagram of an open cluster
... lifetimes than low-mass stars. The Sun will run out of fuel after about 1010 years; a star that is 10× more massive than the Sun will only live for about 10 million years! The point where the main sequence ends (the main sequence turn-off ) is thus a good indicator of the age of a star cluster. In ...
... lifetimes than low-mass stars. The Sun will run out of fuel after about 1010 years; a star that is 10× more massive than the Sun will only live for about 10 million years! The point where the main sequence ends (the main sequence turn-off ) is thus a good indicator of the age of a star cluster. In ...
The star
... Journal, my five in the Monthly Notices of the Royal Astronomical Society. I would remind them that my order has long been famous for its scientific works. We may be few now, but ever since the eighteenth century we have made contributions to astronomy and geophysics out of all proportion to our num ...
... Journal, my five in the Monthly Notices of the Royal Astronomical Society. I would remind them that my order has long been famous for its scientific works. We may be few now, but ever since the eighteenth century we have made contributions to astronomy and geophysics out of all proportion to our num ...
Brock physics - Brock University
... 22. A star that is cool and very luminous must have (a) a very great distance. (b) a very large radius. (c) a very small mass. (d) a very small radius. 23. Stars with masses in excess of 50 solar masses are very common. (a) True. (b) False. 24. The spectroscopic binaries are detected (a) as separate ...
... 22. A star that is cool and very luminous must have (a) a very great distance. (b) a very large radius. (c) a very small mass. (d) a very small radius. 23. Stars with masses in excess of 50 solar masses are very common. (a) True. (b) False. 24. The spectroscopic binaries are detected (a) as separate ...
The Night Sky
... smaller magnitude while fainter stars have a larger magnitude. The brightest star, Sirius has a magnitude –1.4 The faintest stars visible to the unaided eye have a magnitude of about 6. ...
... smaller magnitude while fainter stars have a larger magnitude. The brightest star, Sirius has a magnitude –1.4 The faintest stars visible to the unaided eye have a magnitude of about 6. ...
Formation of Stars
... UV and optical radiation. At the end of stage 2, the fragments are ~100 times the size of the solar system. Stage 3: The cloud fragment develops a hot core - from 100 K to 104 K. The gas density increases much faster in the core than at the surface. A photosphere develops. Size is about the size o ...
... UV and optical radiation. At the end of stage 2, the fragments are ~100 times the size of the solar system. Stage 3: The cloud fragment develops a hot core - from 100 K to 104 K. The gas density increases much faster in the core than at the surface. A photosphere develops. Size is about the size o ...
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.