Me and My Shadow - Making the Sun-Earth - PS
... self-orienting. How it works: Assemble the horizontal sundial (lower dial). Place the combination sundial on a horizontal surface. Using the analemmatic sundial (upper dial), stick a vertical pin in today's date along the date scale (vertical line, center of dial). [Note that pin placement is more p ...
... self-orienting. How it works: Assemble the horizontal sundial (lower dial). Place the combination sundial on a horizontal surface. Using the analemmatic sundial (upper dial), stick a vertical pin in today's date along the date scale (vertical line, center of dial). [Note that pin placement is more p ...
Picturing Objects in the Making: Scheiner, Galileo and the Discovery
... explicit theological or philosophical veto against the possibility of satellites orbiting Jupiter, in the case of the lunar surface Galileo had to confront the authoritative Aristotelian assertion of the incorruptibility of the heavens that ruled out the possibility of topographical irregularities o ...
... explicit theological or philosophical veto against the possibility of satellites orbiting Jupiter, in the case of the lunar surface Galileo had to confront the authoritative Aristotelian assertion of the incorruptibility of the heavens that ruled out the possibility of topographical irregularities o ...
1997 Apparition of Comet Hale-Bopp - HIGP
... the young protostar, only high temperature refractory materials can condense, but farther from the star volatiles can also condense. Since the volatiles are the most abundant species in the original interstellar medium, they will overwhelm the refractory material farther out in the nebula. This prov ...
... the young protostar, only high temperature refractory materials can condense, but farther from the star volatiles can also condense. Since the volatiles are the most abundant species in the original interstellar medium, they will overwhelm the refractory material farther out in the nebula. This prov ...
Counting Sunspots - Lunar and Planetary Institute
... Parents, this may be advanced for your child, but in case inquiring minds want to know: Sunspots are dark, planet-sized regions that appear on the "surface" of the Sun. Sunspots are "dark" because they are colder than the areas around them. A large sunspot might have a temperature of about 3,700°Co ...
... Parents, this may be advanced for your child, but in case inquiring minds want to know: Sunspots are dark, planet-sized regions that appear on the "surface" of the Sun. Sunspots are "dark" because they are colder than the areas around them. A large sunspot might have a temperature of about 3,700°Co ...
Absolute Flux Calibration
... - They are quite compact (hence better for extended configurations and/or higher frequencies than planets) and still sufficiently bright (>500mJy@3mm) ...
... - They are quite compact (hence better for extended configurations and/or higher frequencies than planets) and still sufficiently bright (>500mJy@3mm) ...
THE DEMOGRAPHICS OF LONG-PERIOD COMETS ABSTRACT
... of our sample due to failed follow-up. This is probably a conservative upper limit: most of these lost objects were most likely either not real to begin with or fastmoving objects only visible for a short window of time. Secondly, some comets might have been inactive at these large heliocentric dist ...
... of our sample due to failed follow-up. This is probably a conservative upper limit: most of these lost objects were most likely either not real to begin with or fastmoving objects only visible for a short window of time. Secondly, some comets might have been inactive at these large heliocentric dist ...
as a PDF - Living Reviews in Solar Physics
... The study of the past of our Sun and its solar system has become an interdisciplinary effort between stellar astronomy, astrophysics of star and planet formation, astrochemistry, solar physics, geophysics, planetology, meteoritical science and several further disciplines. The interest in understandi ...
... The study of the past of our Sun and its solar system has become an interdisciplinary effort between stellar astronomy, astrophysics of star and planet formation, astrochemistry, solar physics, geophysics, planetology, meteoritical science and several further disciplines. The interest in understandi ...
Global Seismology of the Sun
... zones of stars. Such oscillations, usually referred to as solar-like oscillations, can for most purposes be described using the theory of linear, adiabatic, oscillations. The behaviour of the modes on the stellar surface is described in terms of spherical harmonics since these functions are a natura ...
... zones of stars. Such oscillations, usually referred to as solar-like oscillations, can for most purposes be described using the theory of linear, adiabatic, oscillations. The behaviour of the modes on the stellar surface is described in terms of spherical harmonics since these functions are a natura ...
The Project Gutenberg eBook #32000: An
... If one is to know the sky, and not simply know about it, a knowledge of the coördinate systems is indispensable, but they always present some difficulties when they are encountered at the beginning of the subject. It is believed that the present treatment prepares so thoroughly for their study and l ...
... If one is to know the sky, and not simply know about it, a knowledge of the coördinate systems is indispensable, but they always present some difficulties when they are encountered at the beginning of the subject. It is believed that the present treatment prepares so thoroughly for their study and l ...
Isaac NEWTON: Philosophiae Naturalis Principia Mathematica. 3 Ed
... length is situated on the side of the earth, which looks at the sun ; & in that greater part comets are usually illuminated more by the sun, as they are very much closer. Corol. 3. Hence also it is evident, that the heavens are free from resistance. For comets have followed oblique paths sometimes c ...
... length is situated on the side of the earth, which looks at the sun ; & in that greater part comets are usually illuminated more by the sun, as they are very much closer. Corol. 3. Hence also it is evident, that the heavens are free from resistance. For comets have followed oblique paths sometimes c ...
Solar Math - GLORIA Project
... http://spacemath.gsfc.nasa.gov Add your email address to our mailing list by contacting Dr. Sten Odenwald at [email protected] ...
... http://spacemath.gsfc.nasa.gov Add your email address to our mailing list by contacting Dr. Sten Odenwald at [email protected] ...
SOHO`s Frequently Asked Questions
... Good question. Even scientists can debate the answer to this one. Two leading answers are "yellowish-white" and "green." Our eyes perceive sunlight as being yellow or white -- but DO NOT LOOK AT the Sun to confirm this! It is also correct to say it is "green," too, because the Sun's peak wavelength ...
... Good question. Even scientists can debate the answer to this one. Two leading answers are "yellowish-white" and "green." Our eyes perceive sunlight as being yellow or white -- but DO NOT LOOK AT the Sun to confirm this! It is also correct to say it is "green," too, because the Sun's peak wavelength ...
PLUTO - Department of Earth and Planetary Sciences, Northwestern
... solar system (and 'aptly' named) Pluto is more complicated and ambiguous than any other object (with few exceptions) in our solar system. It's lopsided orbit and the fact that it has an atmosphere (at ~50K !!) are jut a start. Its five known moons along with Pluto make up a very complex system of ma ...
... solar system (and 'aptly' named) Pluto is more complicated and ambiguous than any other object (with few exceptions) in our solar system. It's lopsided orbit and the fact that it has an atmosphere (at ~50K !!) are jut a start. Its five known moons along with Pluto make up a very complex system of ma ...
Astronomy Test Review
... ____ 23. The two inner planets most alike in size, mass, and density are a. Mercury and Venus. c. Venus and Earth. b. Earth and Mars. d. Mars and Mercury. ____ 24. Kepler’s third law describes the relationship between the average distance of a planet from the sun and the planet’s a. orbital period. ...
... ____ 23. The two inner planets most alike in size, mass, and density are a. Mercury and Venus. c. Venus and Earth. b. Earth and Mars. d. Mars and Mercury. ____ 24. Kepler’s third law describes the relationship between the average distance of a planet from the sun and the planet’s a. orbital period. ...
The chemical composition of solar-type stars and its impact on the
... period of time. One of these ideas is the trace a planet will leave in the composition of its host star: since both planet and host are formed from the same material and the composition of a planet can be very different from that of its host star, a planet host might look different in terms of eleme ...
... period of time. One of these ideas is the trace a planet will leave in the composition of its host star: since both planet and host are formed from the same material and the composition of a planet can be very different from that of its host star, a planet host might look different in terms of eleme ...
asteroid wise - Lawrence Hall of Science
... called constellations. But to specify exactly where an object is in the sky, we use celestial coordinates. Celestial coordinates are to the sky, as geographical coordinates (latitude and longitude) are to the Earth. Review of Geographical Coordinates The Earth’s spin determines special locations on ...
... called constellations. But to specify exactly where an object is in the sky, we use celestial coordinates. Celestial coordinates are to the sky, as geographical coordinates (latitude and longitude) are to the Earth. Review of Geographical Coordinates The Earth’s spin determines special locations on ...
M sin i
... The Solar nebula was made of H y He, with a small fraction of heavy elements. About 4550 - 4400 million years ago these heavy elements condensed as dust in the inner disk, and as ice+dust in the outer disk. According to the Solar system formation theory, Jupiter must form beyond the ice line, at 5 A ...
... The Solar nebula was made of H y He, with a small fraction of heavy elements. About 4550 - 4400 million years ago these heavy elements condensed as dust in the inner disk, and as ice+dust in the outer disk. According to the Solar system formation theory, Jupiter must form beyond the ice line, at 5 A ...
Stars and Planets Credits and Acknowledgements
... Stars and Planets is a series of nine lessons designed to assist students in grades 6-8 in understanding scale in the solar system and beyond, in time as well as space. Many of the lessons use image data from the Hubble Space Telescope and NASA’s other Great Observatories as they take students on a ...
... Stars and Planets is a series of nine lessons designed to assist students in grades 6-8 in understanding scale in the solar system and beyond, in time as well as space. Many of the lessons use image data from the Hubble Space Telescope and NASA’s other Great Observatories as they take students on a ...
$doc.title
... thick structures around solar-type stars equals ∼3 to 10 Myr. The shorter of the two times applies to β Pic as an intermediate-mass star (Strom et al 1993). After that time, photoevaporation and other processes are believed to remove the bulk of gas and fine dust. ...
... thick structures around solar-type stars equals ∼3 to 10 Myr. The shorter of the two times applies to β Pic as an intermediate-mass star (Strom et al 1993). After that time, photoevaporation and other processes are believed to remove the bulk of gas and fine dust. ...
Planet X, Comets and Earth Changes
... provided the basis for the electric fields and plasma discharge phenomena that have become the core elements of his theoretical models of the true nature of the solar system in which we live. Upon being fired from the physics department for his radical beliefs, Mr. McCanney was rehired shortly there ...
... provided the basis for the electric fields and plasma discharge phenomena that have become the core elements of his theoretical models of the true nature of the solar system in which we live. Upon being fired from the physics department for his radical beliefs, Mr. McCanney was rehired shortly there ...
Preview Sample 1
... what planets are c. Bode’s Law cannot apply, since there are no planets at 2.8 AU from the Sun d. Bode’s Law never applied in the first place Ans: b 27. In the 1840’s, some astronomers noted slight discrepancies in the orbit of Uranus. One suggestion was that the gravity of an unknown planet beyond ...
... what planets are c. Bode’s Law cannot apply, since there are no planets at 2.8 AU from the Sun d. Bode’s Law never applied in the first place Ans: b 27. In the 1840’s, some astronomers noted slight discrepancies in the orbit of Uranus. One suggestion was that the gravity of an unknown planet beyond ...
teach with space
... Not all comet tails are as spectacular as those shown in Figure 1, or even visible from Earth. It is the size of the nucleus, its constituents, how close to the Sun it approaches, and how many times the comet has previously approached the Sun that determine how spectacular its tail will look. Once p ...
... Not all comet tails are as spectacular as those shown in Figure 1, or even visible from Earth. It is the size of the nucleus, its constituents, how close to the Sun it approaches, and how many times the comet has previously approached the Sun that determine how spectacular its tail will look. Once p ...
starry night companion
... learn how high above the horizon is 10°, how high is 30°, and so on. Starry Night can show you the altitude and azimuth of any object at any time (just double-click on the object to bring up its Info Window with this information) and can also mark the zenith and nadir points and/or the meridian line ...
... learn how high above the horizon is 10°, how high is 30°, and so on. Starry Night can show you the altitude and azimuth of any object at any time (just double-click on the object to bring up its Info Window with this information) and can also mark the zenith and nadir points and/or the meridian line ...
as a PDF file
... AU. Still further out, the Earth-approaching Amor asteroids move in orbits which do not at present cross that of Earth, but which have perihelion distances from the Sun of less than 1.3 AU. These three groups of objects are usually lumped together and called nearEarth asteroids (NEA’s). Roughly 200 ...
... AU. Still further out, the Earth-approaching Amor asteroids move in orbits which do not at present cross that of Earth, but which have perihelion distances from the Sun of less than 1.3 AU. These three groups of objects are usually lumped together and called nearEarth asteroids (NEA’s). Roughly 200 ...
teach with space
... Not all comet tails are as spectacular as those shown in Figure 1, or even visible from Earth. It is the size of the nucleus, its constituents, how close to the Sun it approaches, and how many times the comet has previously approached the Sun that determine how spectacular its tail will look. Once p ...
... Not all comet tails are as spectacular as those shown in Figure 1, or even visible from Earth. It is the size of the nucleus, its constituents, how close to the Sun it approaches, and how many times the comet has previously approached the Sun that determine how spectacular its tail will look. Once p ...
Solar System
The Solar System comprises the Sun and the planetary system that orbits it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the planets, with the remainder being significantly smaller objects, such as dwarf planets and small Solar System bodies such as comets and asteroids. Of those that orbit the Sun indirectly, two are larger than the smallest planet.The Solar System formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority of the system's mass is in the Sun, with most of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composed of rock and metal. The four outer planets are giant planets, being substantially more massive than the terrestrials. The two largest, Jupiter and Saturn, are gas giants, being composed mainly of hydrogen and helium; the two outermost planets, Uranus and Neptune, are ice giants, being composed largely of substances with relatively high melting points compared with hydrogen and helium, called ices, such as water, ammonia and methane. All planets have almost circular orbits that lie within a nearly flat disc called the ecliptic.The Solar System also contains smaller objects. The asteroid belt, which lies between Mars and Jupiter, mostly contains objects composed, like the terrestrial planets, of rock and metal. Beyond Neptune's orbit lie the Kuiper belt and scattered disc, populations of trans-Neptunian objects composed mostly of ices, and beyond them a newly discovered population of sednoids. Within these populations are several dozen to possibly tens of thousands of objects large enough to have been rounded by their own gravity. Such objects are categorized as dwarf planets. Identified dwarf planets include the asteroid Ceres and the trans-Neptunian objects Pluto and Eris. In addition to these two regions, various other small-body populations, including comets, centaurs and interplanetary dust, freely travel between regions. Six of the planets, at least three of the dwarf planets, and many of the smaller bodies are orbited by natural satellites, usually termed ""moons"" after the Moon. Each of the outer planets is encircled by planetary rings of dust and other small objects.The solar wind, a stream of charged particles flowing outwards from the Sun, creates a bubble-like region in the interstellar medium known as the heliosphere. The heliopause is the point at which pressure from the solar wind is equal to the opposing pressure of interstellar wind; it extends out to the edge of the scattered disc. The Oort cloud, which is believed to be the source for long-period comets, may also exist at a distance roughly a thousand times further than the heliosphere. The Solar System is located in the Orion Arm, 26,000 light-years from the center of the Milky Way.