pluto: a human comedy
... place from which they were observed. These facts could be organised into a workable model, if one imagined a round Earth which rotated with a period of one day, about an axis which pointed in a direction very close to the position of the Polaris. This model is, of course, consistent with the notion ...
... place from which they were observed. These facts could be organised into a workable model, if one imagined a round Earth which rotated with a period of one day, about an axis which pointed in a direction very close to the position of the Polaris. This model is, of course, consistent with the notion ...
Document
... the Sun's mass consists of hydrogen; the rest is mostly helium, with much smaller quantities of heavier elements, including oxygen, carbon, neon and iron. ...
... the Sun's mass consists of hydrogen; the rest is mostly helium, with much smaller quantities of heavier elements, including oxygen, carbon, neon and iron. ...
Document
... the Sun's mass consists of hydrogen; the rest is mostly helium, with much smaller quantities of heavier elements, including oxygen, carbon, neon and iron. ...
... the Sun's mass consists of hydrogen; the rest is mostly helium, with much smaller quantities of heavier elements, including oxygen, carbon, neon and iron. ...
- Scholieren.com
... - The Sun is the most prominent feature in our solar system, it is the largest object and contains approximately 98% of the total solar system mass - The Earth could fit 1,3 times into the Earth - The temperature of the Sun’s outer layer is 6,000 degrees The equation E=mc2 The formula expresses the ...
... - The Sun is the most prominent feature in our solar system, it is the largest object and contains approximately 98% of the total solar system mass - The Earth could fit 1,3 times into the Earth - The temperature of the Sun’s outer layer is 6,000 degrees The equation E=mc2 The formula expresses the ...
Protostar formation
... of km down to few thousands of km. The temperature increases from -270 oC to million of degrees. At this temperature, the nuclear fuel (hydrogen) is “light up”. Light is emitted, and the star starts its life: on one hand, gravitational force pushes inward, while on the other hand internal pressure d ...
... of km down to few thousands of km. The temperature increases from -270 oC to million of degrees. At this temperature, the nuclear fuel (hydrogen) is “light up”. Light is emitted, and the star starts its life: on one hand, gravitational force pushes inward, while on the other hand internal pressure d ...
OORT CLOUD EXPLORER - DYNAMIC OCCULTATION
... The Oort cloud is that region of the solar system that extends radial from the zone where gravitational forces from galactic tides and stellar fly-bys of the forming solar system start to dominate the motions of solar system objects (around 2,000 AU from the Sun) to the zone where passing stars and ...
... The Oort cloud is that region of the solar system that extends radial from the zone where gravitational forces from galactic tides and stellar fly-bys of the forming solar system start to dominate the motions of solar system objects (around 2,000 AU from the Sun) to the zone where passing stars and ...
Star Track 2 - The Search for a Supermassive Black... Early radio astronomers detected an immensely
... 7. Why do astronomers think this makes SgrA* a black hole, and not some other kind of object? This is about half the mass of the sun per cubic AU – actually much less than the Sun's density. So in principle SgrA* "could" be some other object. However, this density is just a minimum, and we know of m ...
... 7. Why do astronomers think this makes SgrA* a black hole, and not some other kind of object? This is about half the mass of the sun per cubic AU – actually much less than the Sun's density. So in principle SgrA* "could" be some other object. However, this density is just a minimum, and we know of m ...
Test and answer key
... 19. When Mars is at opposition, it A rises at about midnight. B is high in the sky at sunset. C *is high in the sky at midnight. D is high in the sky at noon. 20. Kepler's second law states that a line joining a planet to the Sun A sweeps through equal angles in equal times. B points in the same dir ...
... 19. When Mars is at opposition, it A rises at about midnight. B is high in the sky at sunset. C *is high in the sky at midnight. D is high in the sky at noon. 20. Kepler's second law states that a line joining a planet to the Sun A sweeps through equal angles in equal times. B points in the same dir ...
The solar system
... We have to be fast and step over the centuries. • In ancient Greece, different ideas are at odds with each other: in disagreement with ARISTARQUES OF SAMOS, ARISTOTLE thought the Earth was motionless. His idea of force is not very clear; besides, he confuses speed and variation of speed, i.e. accele ...
... We have to be fast and step over the centuries. • In ancient Greece, different ideas are at odds with each other: in disagreement with ARISTARQUES OF SAMOS, ARISTOTLE thought the Earth was motionless. His idea of force is not very clear; besides, he confuses speed and variation of speed, i.e. accele ...
View/Open - SUNY DSpace
... came to be is debatable. One of the strongest theories on it is called The Solar Nebula Theory; which states our solar system was probably formed out of a spinning ball of gas (Stander). When this ball became bright enough, it exploded and blew dust and gases into space, leaving gravity to work for ...
... came to be is debatable. One of the strongest theories on it is called The Solar Nebula Theory; which states our solar system was probably formed out of a spinning ball of gas (Stander). When this ball became bright enough, it exploded and blew dust and gases into space, leaving gravity to work for ...
Name
... explosion form what is now called the _____________________ ________________. 30. In 1987 a supernova called ____________________________ was discovered. 31. When the largest of stars explode (supernova) the dense core that is left becomes not a pulsar, but a _____________ ______________. 32. The fi ...
... explosion form what is now called the _____________________ ________________. 30. In 1987 a supernova called ____________________________ was discovered. 31. When the largest of stars explode (supernova) the dense core that is left becomes not a pulsar, but a _____________ ______________. 32. The fi ...
Astronomy 101 Course Review and Summary
... Liquid outer layer: hydrogen, helium Liquid or slushy mantle: water, ammonia Solid core: rock, metal ...
... Liquid outer layer: hydrogen, helium Liquid or slushy mantle: water, ammonia Solid core: rock, metal ...
A brightening Sun will boil the seas and bake the continents a billion
... Mercury’s orbit and swallowing the innermost planet. If any people were to visit Earth on a spaceship from the more temperate outer solar system, they would see the Sun as a bloated red sphere spanning some 50° of the sky. If our planet still rotated once every 24 hours, it would take the Sun more t ...
... Mercury’s orbit and swallowing the innermost planet. If any people were to visit Earth on a spaceship from the more temperate outer solar system, they would see the Sun as a bloated red sphere spanning some 50° of the sky. If our planet still rotated once every 24 hours, it would take the Sun more t ...
Chapter 4 Practice Questions
... Question 3 a) mass times surface gravity b) mass divided by volume c) size divided by weight d) mass times surface area e) weight divided by size ...
... Question 3 a) mass times surface gravity b) mass divided by volume c) size divided by weight d) mass times surface area e) weight divided by size ...
Chapter 10
... quickly changes views from the first photo to the second. 4. Pluto was discovered 6° from where Lowell had predicted it. 5. Pluto, however, is too small to cause the irregularities that had been seen in Uranus’s orbit. Later it was shown that these irregularities were not caused by another planet bu ...
... quickly changes views from the first photo to the second. 4. Pluto was discovered 6° from where Lowell had predicted it. 5. Pluto, however, is too small to cause the irregularities that had been seen in Uranus’s orbit. Later it was shown that these irregularities were not caused by another planet bu ...
The Solar System Interplanetary Matter and the Birth of the Planets
... nebular cloud at these higher temperatures was metallic and rocky in nature. ...
... nebular cloud at these higher temperatures was metallic and rocky in nature. ...
The Earth in space: An essay on the origin of the Solar system
... for almost circular orbits of the planets, it was postulated that at that time the Sun was surrounded by a uniformly rotating gaseous envelope, which helped to turn the originally elongated planetary orbits into regular circles by viscous drag. The gaseous envelope gradually dissipated into interste ...
... for almost circular orbits of the planets, it was postulated that at that time the Sun was surrounded by a uniformly rotating gaseous envelope, which helped to turn the originally elongated planetary orbits into regular circles by viscous drag. The gaseous envelope gradually dissipated into interste ...
Return both exam and scantron sheet when you
... 65. Uranus spins counterclockwise as observed from far above the Earth’s North Pole. (a) True. (b) False. 66. The diameter of the Sun is about ...
... 65. Uranus spins counterclockwise as observed from far above the Earth’s North Pole. (a) True. (b) False. 66. The diameter of the Sun is about ...
Eratosthenes - Allendale School
... that his insistence on his geocentric model of the known universe dominated western thought for almost 1500 years. In fact, the geocentric model he proposed is often referred to as the Ptolemaic System. One of the reasons that Ptolemy’s model was so compelling is that people could make accurate pred ...
... that his insistence on his geocentric model of the known universe dominated western thought for almost 1500 years. In fact, the geocentric model he proposed is often referred to as the Ptolemaic System. One of the reasons that Ptolemy’s model was so compelling is that people could make accurate pred ...
Astronomy 82 - Problem Set #1
... Earth: its escape velocity is much lower (~11 km/s) and its temperature is a bit higher, so there is a slow, but substantial, “leak” of helium from Earth's atmosphere. The helium we see is being constantly replenished by the radioactive alpha-decay of heavier elements! 4) How far from the Sun’s cent ...
... Earth: its escape velocity is much lower (~11 km/s) and its temperature is a bit higher, so there is a slow, but substantial, “leak” of helium from Earth's atmosphere. The helium we see is being constantly replenished by the radioactive alpha-decay of heavier elements! 4) How far from the Sun’s cent ...
All About Astronomy The Planets
... and others. The sun is the center of our solar system; the planets, their moons, a belt of asteroids, comets, and other rocks and gas orbit the sun. The eight planets that orbit the sun are (in order from the sun): Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Another large body is ...
... and others. The sun is the center of our solar system; the planets, their moons, a belt of asteroids, comets, and other rocks and gas orbit the sun. The eight planets that orbit the sun are (in order from the sun): Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Another large body is ...
Collisions with Comets and Asteroids
... out of its original orbit into an increasingly eccentric one. The asteroid may either leave the solar system or move in toward the terrestrial, rocky planets. Eventually, such vagrants collide with Mars, the earthmoon system, Venus, Mercury or even the sun. A major fragment enters the inner solar sy ...
... out of its original orbit into an increasingly eccentric one. The asteroid may either leave the solar system or move in toward the terrestrial, rocky planets. Eventually, such vagrants collide with Mars, the earthmoon system, Venus, Mercury or even the sun. A major fragment enters the inner solar sy ...
Theme 7.2 -- The Complete Solar System
... So, we've discovered planetary systems around many stars but we should be aware of very strong ‘selection effects’ -- that is to say certain biases that are going to influence the kinds of planets we can detect and constrain our ability to draw general conclusions. For example, planets that are big ...
... So, we've discovered planetary systems around many stars but we should be aware of very strong ‘selection effects’ -- that is to say certain biases that are going to influence the kinds of planets we can detect and constrain our ability to draw general conclusions. For example, planets that are big ...
The Photosphere
... April 27, 2000, with the McMath–Pierce Solar Telescope at the KiF Peak NaConal Observatory, Arizona. The area covered is 100x100 arc-‐secs. The strong influence of magneCc fields shapes the structure. A ...
... April 27, 2000, with the McMath–Pierce Solar Telescope at the KiF Peak NaConal Observatory, Arizona. The area covered is 100x100 arc-‐secs. The strong influence of magneCc fields shapes the structure. A ...
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.