Lecture 1: Observations of planetary systems
... Here A is the albedo (typically A = 0.1–0.5). If we assume that A = 0.3 we find that Jupiter reflects fJup = 1 × 10−9 of the Sun’s luminosity, while Earth reflects f⊕ = 2 × 10−10 . We therefore expect planets to be 22–25 magnitudes fainter than their host stars at optical wavelengths. This presents ...
... Here A is the albedo (typically A = 0.1–0.5). If we assume that A = 0.3 we find that Jupiter reflects fJup = 1 × 10−9 of the Sun’s luminosity, while Earth reflects f⊕ = 2 × 10−10 . We therefore expect planets to be 22–25 magnitudes fainter than their host stars at optical wavelengths. This presents ...
Summary Of the Structure of the Milky Way
... galactic center and the largest dimension of the Milky Way – the Halo. • In addition, more complex analysis of globular clusters has yielded the orbital speed of the Sun as it orbits the galactic center and the age of the Milky Way. • Finally, when knowledge of the orbital speed of Sun is combined w ...
... galactic center and the largest dimension of the Milky Way – the Halo. • In addition, more complex analysis of globular clusters has yielded the orbital speed of the Sun as it orbits the galactic center and the age of the Milky Way. • Finally, when knowledge of the orbital speed of Sun is combined w ...
to view the common myths about sunscreen and sunbathing
... FACT: The damaging UV rays from the sun are reflected from sand, sea, snow, water and other surfaces and so sun damage can occur whilst you are sitting in the shade. Regardless of whether you are in the shade or fully exposed to the sun’s rays, you must take sun protection seriously and use an SPF 3 ...
... FACT: The damaging UV rays from the sun are reflected from sand, sea, snow, water and other surfaces and so sun damage can occur whilst you are sitting in the shade. Regardless of whether you are in the shade or fully exposed to the sun’s rays, you must take sun protection seriously and use an SPF 3 ...
J: Chapter 4: Stars and Galaxies
... to determine their distances from Earth. Figure 4 shows how a close star’s position appears to change. Knowing the angle that the star’s position changes and the size of Earth’s orbit, astronomers can calculate the distance of the star from Earth. Because space is so vast, a special unit of measure ...
... to determine their distances from Earth. Figure 4 shows how a close star’s position appears to change. Knowing the angle that the star’s position changes and the size of Earth’s orbit, astronomers can calculate the distance of the star from Earth. Because space is so vast, a special unit of measure ...
PPT
... Temperature in Celsius or Fahrenheit are conveniences Temperature in Kelvin directly measures how much heat a material has Temperature in Kelvin is always positive Nothing actually has a temperature of absolute zero ...
... Temperature in Celsius or Fahrenheit are conveniences Temperature in Kelvin directly measures how much heat a material has Temperature in Kelvin is always positive Nothing actually has a temperature of absolute zero ...
PDF format
... e) This might be true if the visit occurred in the winter when different constellations are visible than in the summer. © 2014 Pearson Education, Inc. ...
... e) This might be true if the visit occurred in the winter when different constellations are visible than in the summer. © 2014 Pearson Education, Inc. ...
pkt 14 Astrophysics
... O - 30,000 - 60,000 K, ionized H, weak H lines, spectral lines are spread out. O types are rare and gigantic. B -10,000 - 30,000K, H lines are stronger, lines are less spread out (Rigel, Spica are type B stars) A - 7,500 - 10,000K, strong H lines, Mg, Ca lines appear (H and K) (Sirius, Deneb and Veg ...
... O - 30,000 - 60,000 K, ionized H, weak H lines, spectral lines are spread out. O types are rare and gigantic. B -10,000 - 30,000K, H lines are stronger, lines are less spread out (Rigel, Spica are type B stars) A - 7,500 - 10,000K, strong H lines, Mg, Ca lines appear (H and K) (Sirius, Deneb and Veg ...
TISHTRIYA - Earth`s second Sun
... tint. Sirius B is a ’White Dwarf’ star, invisible to the naked eye, intensely dense about 4 times the diameter of our Earth. This suggests that at some previous time, having used up all its hydrogen reserve, it expanded as a ‘Red Giant’ during its dying moments and then suddenly collapsed into the s ...
... tint. Sirius B is a ’White Dwarf’ star, invisible to the naked eye, intensely dense about 4 times the diameter of our Earth. This suggests that at some previous time, having used up all its hydrogen reserve, it expanded as a ‘Red Giant’ during its dying moments and then suddenly collapsed into the s ...
A Binary Mass-Orbit Nomenclature for Planetary Bodies
... But there is a snag. The criterion for a dynamically dominant planet depends on two factors: in addition to its mass, its distance from the Sun is also important. The more distant a planetary body is, the greater its mass needs to be for it to dominate its surroundings to the same extent and over th ...
... But there is a snag. The criterion for a dynamically dominant planet depends on two factors: in addition to its mass, its distance from the Sun is also important. The more distant a planetary body is, the greater its mass needs to be for it to dominate its surroundings to the same extent and over th ...
Stephen Ashworth
... But there is a snag. The criterion for a dynamically dominant planet depends on two factors: in addition to its mass, its distance from the Sun is also important. The more distant a planetary body is, the greater its mass needs to be for it to dominate its surroundings to the same extent and over th ...
... But there is a snag. The criterion for a dynamically dominant planet depends on two factors: in addition to its mass, its distance from the Sun is also important. The more distant a planetary body is, the greater its mass needs to be for it to dominate its surroundings to the same extent and over th ...
Planets Orbiting the Sun and Other Stars - Beck-Shop
... and 50,000 AU (or some say as great as 200,000 AU) from the Sun and there is indirect evidence for a central doughnut shaped cloud between 2,000 and 20,000 AU called the Hill’s cloud. It must be admitted that there is yet no direct evidence for either the Oort cloud or the Hill’s cloud although indi ...
... and 50,000 AU (or some say as great as 200,000 AU) from the Sun and there is indirect evidence for a central doughnut shaped cloud between 2,000 and 20,000 AU called the Hill’s cloud. It must be admitted that there is yet no direct evidence for either the Oort cloud or the Hill’s cloud although indi ...
New Almagest - University of Notre Dame
... observable phenomena. These phenomena were, in fact, not observed. Thus the Earth must not rotate. These are the physical and “physicomathematical” demonstrations Riccioli mentions in his main conclusion about which “hypothesis” can be asserted as being true. A second anti-Copernican argument—one th ...
... observable phenomena. These phenomena were, in fact, not observed. Thus the Earth must not rotate. These are the physical and “physicomathematical” demonstrations Riccioli mentions in his main conclusion about which “hypothesis” can be asserted as being true. A second anti-Copernican argument—one th ...
Overview Orientation of the Night Sky Figure 1:
... 2. Hold out your fist at an arms distance and carefully rotate your body, keeping your arm stiff, to exactly how many fist-widths fit into the 90 degree angle. a. Example: Say it takes 8 of my fists to cover the 90 degree angle. Then we have: 90/8 = 11 (degrees/fist) 3. Repeat the measurement to see ...
... 2. Hold out your fist at an arms distance and carefully rotate your body, keeping your arm stiff, to exactly how many fist-widths fit into the 90 degree angle. a. Example: Say it takes 8 of my fists to cover the 90 degree angle. Then we have: 90/8 = 11 (degrees/fist) 3. Repeat the measurement to see ...
Celestial Coordinates Celestial Sphere: The celestial sphere is an
... gravitational pull of the Sun and the Moon on the Earth's equatorial bulge. Therefore, as it moves through the precessional circle, it moves in little waves with amplitude of 19 arc seconds and a period of 19 years. Proper Motion: This is the rate at which directions in the sky change, in arc second ...
... gravitational pull of the Sun and the Moon on the Earth's equatorial bulge. Therefore, as it moves through the precessional circle, it moves in little waves with amplitude of 19 arc seconds and a period of 19 years. Proper Motion: This is the rate at which directions in the sky change, in arc second ...
Chapter 6 Stars
... are the remains of high-mass stars. They are even smaller and denser than white dwarfs. A neutron star may contain as much as three times the mass of the sun but be only about 25 kilometers in diameter, the size of a city! In 1967, Jocelyn Bell, a British astronomy student, detected an object in spa ...
... are the remains of high-mass stars. They are even smaller and denser than white dwarfs. A neutron star may contain as much as three times the mass of the sun but be only about 25 kilometers in diameter, the size of a city! In 1967, Jocelyn Bell, a British astronomy student, detected an object in spa ...
Space astrometry 2: Scientific results from Hipparcos
... • monitoring Sun-like stars within 60 pc probes activity versus age (Wright 2004, 2006) (3) Various other studies of Sun’s orbit, spiral arm + Galactic plane passages (vertical oscillation period ~ 82 Myr), cratering records, geological crustal features, and relation between cosmic ray production an ...
... • monitoring Sun-like stars within 60 pc probes activity versus age (Wright 2004, 2006) (3) Various other studies of Sun’s orbit, spiral arm + Galactic plane passages (vertical oscillation period ~ 82 Myr), cratering records, geological crustal features, and relation between cosmic ray production an ...
H-alpha and our Sun
... The first class unites the short-lasting prominences. This class is divided into three types: type Ia – loop prominences and coronal rain, type Ib - surge and type Ic – spray prominences. The prominences from the different types have different physical characteristics. For example the surge prominen ...
... The first class unites the short-lasting prominences. This class is divided into three types: type Ia – loop prominences and coronal rain, type Ib - surge and type Ic – spray prominences. The prominences from the different types have different physical characteristics. For example the surge prominen ...
The Sun and Stars
... How our solar A planetary system (like the solar system) forms out of the same system was nebula that creates the star. The protostar that became the sun also formed contained small amounts of other elements such as carbon, nickel, iron, aluminum, and silicon. As the protostar swirled inward on itse ...
... How our solar A planetary system (like the solar system) forms out of the same system was nebula that creates the star. The protostar that became the sun also formed contained small amounts of other elements such as carbon, nickel, iron, aluminum, and silicon. As the protostar swirled inward on itse ...
University of Arizona Department of Astronomy
... Which planet is the 3rd rock from the Sun? Which star is the brightest start in the sky? How many miles in an AU? What is the density of Saturn? ...
... Which planet is the 3rd rock from the Sun? Which star is the brightest start in the sky? How many miles in an AU? What is the density of Saturn? ...
Document
... stars and would result in numbers that are cumbersome to use. • B is incorrect because light-years are used to measure distances in the universe and would be too large to use as a measure of the size of stars. • C is correct because the radius of the sun, one solar radius, is used to measure the siz ...
... stars and would result in numbers that are cumbersome to use. • B is incorrect because light-years are used to measure distances in the universe and would be too large to use as a measure of the size of stars. • C is correct because the radius of the sun, one solar radius, is used to measure the siz ...
Hipparcos distance estimates of the Ophiuchus and the Lupus cloud
... dark molecular clouds and their dense cores. One of the main motivations for these investigations is the study of the process of star and planet formation in its entirety, and a deeper understanding of the effects of the local environment. A key aspect of the scientific analysis of a dark molecular c ...
... dark molecular clouds and their dense cores. One of the main motivations for these investigations is the study of the process of star and planet formation in its entirety, and a deeper understanding of the effects of the local environment. A key aspect of the scientific analysis of a dark molecular c ...
Journey to the Stars Educator`s Guide
... the Big Bang), all that existed in the universe was dark matter and the elements hydrogen, helium, and trace amounts of lithium. Dark matter’s gravity gathered the gas to form the first stars. Over the next few billion years, stars were born more rapidly than at any other period in the history of the ...
... the Big Bang), all that existed in the universe was dark matter and the elements hydrogen, helium, and trace amounts of lithium. Dark matter’s gravity gathered the gas to form the first stars. Over the next few billion years, stars were born more rapidly than at any other period in the history of the ...
Lab 2 - TCNJ
... path through the sky, with the days growing longer and longer, until it reaches it highest point in the sky on the summer solstice. On the Summer Solstice, which occurs on June 21, the Sun is at its highest path through the sky and the day is the longest. Because the day is so long the Sun does not ...
... path through the sky, with the days growing longer and longer, until it reaches it highest point in the sky on the summer solstice. On the Summer Solstice, which occurs on June 21, the Sun is at its highest path through the sky and the day is the longest. Because the day is so long the Sun does not ...