Proxima
... Centaurus is known as a “myth” constellation. It’s the 9th largest constellation in the sky Proxima is the 3rd star in Centaurus Contains 2 of the brightest stars (Alpha Centauri and Beta Centauri) It contains 11 stars ...
... Centaurus is known as a “myth” constellation. It’s the 9th largest constellation in the sky Proxima is the 3rd star in Centaurus Contains 2 of the brightest stars (Alpha Centauri and Beta Centauri) It contains 11 stars ...
Test 2, Nov. 17, 2015 - Physics@Brock
... (a) star S has hotter surface than star U. (b) star S has colder surface than star U. (c) both stars have the same surface temperature. (d) [No comparison of their surface temperatures can be made.] 16. A photon can be absorbed by an atom only if the photon energy is equal to the energy difference o ...
... (a) star S has hotter surface than star U. (b) star S has colder surface than star U. (c) both stars have the same surface temperature. (d) [No comparison of their surface temperatures can be made.] 16. A photon can be absorbed by an atom only if the photon energy is equal to the energy difference o ...
Stars Chapter 21
... light from a distant star into its characteristic color • SPECTRUM: the band of colors that forms as light passes through a prism • Used to see if galaxies are moving away or toward the earth ...
... light from a distant star into its characteristic color • SPECTRUM: the band of colors that forms as light passes through a prism • Used to see if galaxies are moving away or toward the earth ...
THE BIRTH AND DEATH OF A LOW/MEDIUM MASS STAR
... • THE STAGE WHEN A STAR IS IN IT’S “BEST” LIFE CYCLE • OUR SUN IS A MAIN SEQUENCE STAR • MAIN SEQUENCE STARS HAVE MOSTLY HYDROGEN. • THE HYDROGEN EXPLODES, GIVING OFF LIGHT AND HEAT • AS IT EXPLODES, THE HYDROGEN TURNS TO HELIUM. • HELIUM IS LIGHTER THAN HYDROGEN. • OUR SUN IS 4.6 BILLION YEARS OLD. ...
... • THE STAGE WHEN A STAR IS IN IT’S “BEST” LIFE CYCLE • OUR SUN IS A MAIN SEQUENCE STAR • MAIN SEQUENCE STARS HAVE MOSTLY HYDROGEN. • THE HYDROGEN EXPLODES, GIVING OFF LIGHT AND HEAT • AS IT EXPLODES, THE HYDROGEN TURNS TO HELIUM. • HELIUM IS LIGHTER THAN HYDROGEN. • OUR SUN IS 4.6 BILLION YEARS OLD. ...
Earth Science Unit Test Review
... Key Questions: 1. Describe composition of Sun. What type of star is it? How long does it take light from Sun to reach us? 2. Identify the features of the Sun on a diagram. Why do sunspots a ...
... Key Questions: 1. Describe composition of Sun. What type of star is it? How long does it take light from Sun to reach us? 2. Identify the features of the Sun on a diagram. Why do sunspots a ...
Stars - HMXEarthScience
... Sequence” star during which size, the star grows in size as it uses up its fuel 5. Eventually when the hydrogen fuel becomes exhausted, the star expands greatly becoming a giant or a supergiant ...
... Sequence” star during which size, the star grows in size as it uses up its fuel 5. Eventually when the hydrogen fuel becomes exhausted, the star expands greatly becoming a giant or a supergiant ...
Test - Hampton Science 8A 8B 8C 8D 8E Stars are classified on the
... Stars are classified on the Hertzsprung - Russell diagram according to their absolute magnitude and their surface temperatures at a given time in a star’s life cycle. What classification would a star have if it was very hot and very bright? ...
... Stars are classified on the Hertzsprung - Russell diagram according to their absolute magnitude and their surface temperatures at a given time in a star’s life cycle. What classification would a star have if it was very hot and very bright? ...
Astronomy 110 Announcements: 11.1 Properties of Stars
... hydrogen into helium in their cores like the Sun ...
... hydrogen into helium in their cores like the Sun ...
powerpoint version
... Black Holes If the mass of the core is more than about 3 solar masses the neutron degeneracy is overwhelmed and the core goes on collapsing. When the core diameter reaches the Schwarzschild radius (9 km for a 3 solar mass remnant) nothing, not even light, can escape. ...
... Black Holes If the mass of the core is more than about 3 solar masses the neutron degeneracy is overwhelmed and the core goes on collapsing. When the core diameter reaches the Schwarzschild radius (9 km for a 3 solar mass remnant) nothing, not even light, can escape. ...
Star Classification
... Most stars, including the sun, are "main sequence stars," fueled by nuclear fusion converting hydrogen into helium. For these stars, the hotter they are, the brighter. These stars are in the most stable part of their existence; this stage generally lasts for about 5 billion years. As stars begin to ...
... Most stars, including the sun, are "main sequence stars," fueled by nuclear fusion converting hydrogen into helium. For these stars, the hotter they are, the brighter. These stars are in the most stable part of their existence; this stage generally lasts for about 5 billion years. As stars begin to ...
Astrophysics - Florence
... Large grouping of stars, gas, and dust in space that are held together by gravity. ...
... Large grouping of stars, gas, and dust in space that are held together by gravity. ...
Lecture 14 - Center for Astrophysics and Space Astronomy CASA
... orbiting, but we can see them both Astrometric Binary proper motion wiggles to show orbit Spectrum Binary spectra of two stars of different type Spectroscopic Binary Doppler shift shows orbital motion Eclipsing Binary light varies Half of all stars are in binaries…. Binary stars are formed at birth. ...
... orbiting, but we can see them both Astrometric Binary proper motion wiggles to show orbit Spectrum Binary spectra of two stars of different type Spectroscopic Binary Doppler shift shows orbital motion Eclipsing Binary light varies Half of all stars are in binaries…. Binary stars are formed at birth. ...
Instrumentation for Cosmology
... Just strings of stars? No, because they would be tightly wound up. Suppose the age of the galaxy is 10 billion years. Its inner regions rotate once in 200 million years… Therefore, we’d expect about 50 turns. The galaxy would look like a clock spring. ...
... Just strings of stars? No, because they would be tightly wound up. Suppose the age of the galaxy is 10 billion years. Its inner regions rotate once in 200 million years… Therefore, we’d expect about 50 turns. The galaxy would look like a clock spring. ...
spectral-type
... If we want learn about the number of absorbers for a given element (say, calcium, iron, gold, etc) then we need to know the temperature of the star. If we know the temperature we can account for its effect and… The line strength will only depend on the Number of Absorbers. ...
... If we want learn about the number of absorbers for a given element (say, calcium, iron, gold, etc) then we need to know the temperature of the star. If we know the temperature we can account for its effect and… The line strength will only depend on the Number of Absorbers. ...
Eclipsing Binaries
... If the binary stars are eclipsing, then it is guaranteed that we are in the orbital plane. This means that the maximum radial velocity on the velocity plot gives us the orbital velocity. Now we have “a” and we have “P”. We can get rid of one of the “M”s because we know how they are related. ...
... If the binary stars are eclipsing, then it is guaranteed that we are in the orbital plane. This means that the maximum radial velocity on the velocity plot gives us the orbital velocity. Now we have “a” and we have “P”. We can get rid of one of the “M”s because we know how they are related. ...
Introduction to Accretion Phenomena in Astrophysics
... binary discovered by: 1617 - Benedetto Castelli (Galilei’s pupil and Toricelli’s teacher). (~380AU distance, they take ~1000 years to revolve around each other!) ...
... binary discovered by: 1617 - Benedetto Castelli (Galilei’s pupil and Toricelli’s teacher). (~380AU distance, they take ~1000 years to revolve around each other!) ...
The Galactic Super Star Cluster Westerlund 1
... Whereas we would expect ~10 -3 of the kinetic energy of winds and supernovae to be dissipated in X-rays,or ~10 36 erg s-1, the luminosity of the diffuse X-ray emission is only 6x10 34 erg s-1 (0.58.0 keV). This represents a factor of 10 deficit in diffuse X-ray emission. Moreover, the diffuse flux i ...
... Whereas we would expect ~10 -3 of the kinetic energy of winds and supernovae to be dissipated in X-rays,or ~10 36 erg s-1, the luminosity of the diffuse X-ray emission is only 6x10 34 erg s-1 (0.58.0 keV). This represents a factor of 10 deficit in diffuse X-ray emission. Moreover, the diffuse flux i ...
Microsoft Power Point version
... But the Universe is 1.37 x 1010 yr old! Every M dwarf that was ever created is still on the main sequence!! ...
... But the Universe is 1.37 x 1010 yr old! Every M dwarf that was ever created is still on the main sequence!! ...
Answers to Final Exam – Study Guide
... 72. The type of high tide that occurs when the earth, the moon and the sun are at a right angle to each other is called a neap tide 73. A 3962 N rock falls off of a cliff. If it falls for 6.8 seconds, the rock will weigh 3962 N 74. Newton’s ____1st____ La w of Motion states that an object at rest wi ...
... 72. The type of high tide that occurs when the earth, the moon and the sun are at a right angle to each other is called a neap tide 73. A 3962 N rock falls off of a cliff. If it falls for 6.8 seconds, the rock will weigh 3962 N 74. Newton’s ____1st____ La w of Motion states that an object at rest wi ...
Properties of Stars in general
... What does this tell us? • Most stars are seen to lie on the Main Sequence. – This is because stars spend the major part of their life in the region of the main sequence – During this period they are burning Hydrogen into Helium in their cores. – Their position in the main sequence is dependant on t ...
... What does this tell us? • Most stars are seen to lie on the Main Sequence. – This is because stars spend the major part of their life in the region of the main sequence – During this period they are burning Hydrogen into Helium in their cores. – Their position in the main sequence is dependant on t ...
Sky News – March 2015 The Realm of the Galaxies
... The North Galactic Pole, the point in the sky directly over the centre of our galaxy, is in the constellation Coma Bernices. With our night sky pointing away from the hustle and bustle of the plane of the Milky Way, we can see deep into the sky without objects being obscured or dimmed by looking thr ...
... The North Galactic Pole, the point in the sky directly over the centre of our galaxy, is in the constellation Coma Bernices. With our night sky pointing away from the hustle and bustle of the plane of the Milky Way, we can see deep into the sky without objects being obscured or dimmed by looking thr ...
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.