Celestial Motions
... parallax could mean one of two things: 1. Stars are so far away that stellar parallax is too small to notice with the naked eye 2. Earth does not orbit Sun; it is the center of the universe With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not ...
... parallax could mean one of two things: 1. Stars are so far away that stellar parallax is too small to notice with the naked eye 2. Earth does not orbit Sun; it is the center of the universe With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not ...
Chapter 13 - USD Home Pages
... a white dwarf might be at several hundred million K, but this extremely high temperature contributes only a small amount of the pressure, compared to EDP. As a result, as a white dwarf cools down, the decrease in total pressure (EDP plus thermodynamic) is slight, so the white dwarf does not shrink a ...
... a white dwarf might be at several hundred million K, but this extremely high temperature contributes only a small amount of the pressure, compared to EDP. As a result, as a white dwarf cools down, the decrease in total pressure (EDP plus thermodynamic) is slight, so the white dwarf does not shrink a ...
Brown_Dwarfs
... Jupiter masses, its life with start out very differently. This brown dwarf will begin deuterium burning. Deuterium is a stable isotope of hydrogen, consisting of one proton and one neutron. It exists naturally, occurring around 6 deuterium atoms for every 10,000 normal hydrogen atoms. The required c ...
... Jupiter masses, its life with start out very differently. This brown dwarf will begin deuterium burning. Deuterium is a stable isotope of hydrogen, consisting of one proton and one neutron. It exists naturally, occurring around 6 deuterium atoms for every 10,000 normal hydrogen atoms. The required c ...
Chapter 25: The Solar System Introduction to the Solar System
... People have not always known about all the objects in our solar system. The ancient Greeks were aware of five of the planets. They did not know what these objects were; they just noticed that they moved differently than the stars did. They seemed to wander around in the sky, changing their position ...
... People have not always known about all the objects in our solar system. The ancient Greeks were aware of five of the planets. They did not know what these objects were; they just noticed that they moved differently than the stars did. They seemed to wander around in the sky, changing their position ...
`Super Earths` Will Have Plate Tectonics, Scientists Predict
... that make up Earth's solid outer shell, are responsible for earthquakes, volcanoes, and other major geological events. In essence, they have dominated Earth's geological history. Earth is the only known planet that has plate tectonics, and this “Our work strongly suggests that super-Earths, activity ...
... that make up Earth's solid outer shell, are responsible for earthquakes, volcanoes, and other major geological events. In essence, they have dominated Earth's geological history. Earth is the only known planet that has plate tectonics, and this “Our work strongly suggests that super-Earths, activity ...
A Brief guide to the night Skies for those who know nothing
... tenth planet outside the orbit of Pluto, but as yet this has not been proved to exist. ...
... tenth planet outside the orbit of Pluto, but as yet this has not been proved to exist. ...
1 - Astronomy
... explained why the planets never move far from the ecliptic, but treated Mercury and Venus as special cases in order to explain their small elongations. 3. Ptolemy’s model meets the first two criteria for a scientific model fairly well but it is much less successful with the third. 4. The Ptolemaic m ...
... explained why the planets never move far from the ecliptic, but treated Mercury and Venus as special cases in order to explain their small elongations. 3. Ptolemy’s model meets the first two criteria for a scientific model fairly well but it is much less successful with the third. 4. The Ptolemaic m ...
this PDF file - Department of Physics and Astronomy
... Department of Physics and Astronomy, University of Leicester. Leicester, LE1 7RH. October 22, 2014. Abstract This article investigates the tidal accelerations exerted by planets on orbiting moons. The tidal acceleration was calculated, in terms of the acceleration due to gravity at the planet’s surf ...
... Department of Physics and Astronomy, University of Leicester. Leicester, LE1 7RH. October 22, 2014. Abstract This article investigates the tidal accelerations exerted by planets on orbiting moons. The tidal acceleration was calculated, in terms of the acceleration due to gravity at the planet’s surf ...
28. Planet Earth - Brigham Young University
... (the same gas that makes up four-fifths of our own atmosphere) comprises nearly all of it, with a little methane and some other hydrocarbons. At 19.2 AU from the sun is Uranus, a planet so far away that it looks like a faint, structureless, greenish disk even in a good telescope, although Voyager 2 ...
... (the same gas that makes up four-fifths of our own atmosphere) comprises nearly all of it, with a little methane and some other hydrocarbons. At 19.2 AU from the sun is Uranus, a planet so far away that it looks like a faint, structureless, greenish disk even in a good telescope, although Voyager 2 ...
Jupiter - waka6b
... How Big is Jupiter ? • Jupiter has an equatorial diameter of 141,700 km compared to Earth's 12,800 km. This means that Jupiter is 11 times the diameter of the Earth, and 1,300 times its volume. This is about like comparing a basketball to a ping pong ball. • Compared to the Sun, Jupiter is about 0. ...
... How Big is Jupiter ? • Jupiter has an equatorial diameter of 141,700 km compared to Earth's 12,800 km. This means that Jupiter is 11 times the diameter of the Earth, and 1,300 times its volume. This is about like comparing a basketball to a ping pong ball. • Compared to the Sun, Jupiter is about 0. ...
the outer planets
... 3. “Picture Smart”: Ask students how they would draw a picture to show what each word means. Draw a picture on chart paper, based on their responses, for each word. Ask them what important details should be labeled in each picture. Label the important details of each picture. Mini-Lesson: Suffixes – ...
... 3. “Picture Smart”: Ask students how they would draw a picture to show what each word means. Draw a picture on chart paper, based on their responses, for each word. Ask them what important details should be labeled in each picture. Label the important details of each picture. Mini-Lesson: Suffixes – ...
First Week slides - UNLV Physics - University of Nevada, Las Vegas
... Five Planets (Mercury, Venus, Mars, Jupiter, Saturn) Comets and asteroids and other small bodies ...
... Five Planets (Mercury, Venus, Mars, Jupiter, Saturn) Comets and asteroids and other small bodies ...
2. The comparison of the forbidden zones for Moons orbits.
... The forbidden zone is located in the vicinity of 0.067 AU (the forbidden distance from small-body to the Planet). Besides, meaning 0.067 AU corresponds to the case of meaning of dimensionless parameter equals to 10ˉ² , but ratio R ₂,₃/R ₁,₂ ~ 0.067. We should additionally note that the radius ...
... The forbidden zone is located in the vicinity of 0.067 AU (the forbidden distance from small-body to the Planet). Besides, meaning 0.067 AU corresponds to the case of meaning of dimensionless parameter equals to 10ˉ² , but ratio R ₂,₃/R ₁,₂ ~ 0.067. We should additionally note that the radius ...
The Outer Planets and Their Moons
... planetary mass (1300 Earth masses). The four Jovian planets together contain 99.5% of the masses of the combined planets; the terrestrial planets look like so much Solar System debris in comparison. Compared to the terrestrial planets the gas giants have extremely low densities, ranging from 700 to ...
... planetary mass (1300 Earth masses). The four Jovian planets together contain 99.5% of the masses of the combined planets; the terrestrial planets look like so much Solar System debris in comparison. Compared to the terrestrial planets the gas giants have extremely low densities, ranging from 700 to ...
Week 2 - Our Solar System
... Other celestial bodies. In addition to the planets and their satellites, there are other types of objects that revolve around the sun. These other celestial bodies include dwarf planets, meteoroids, comets, and asteroids. In 1930 Pluto was discovered and photographed. Scientists originally thought i ...
... Other celestial bodies. In addition to the planets and their satellites, there are other types of objects that revolve around the sun. These other celestial bodies include dwarf planets, meteoroids, comets, and asteroids. In 1930 Pluto was discovered and photographed. Scientists originally thought i ...
Prep/Review Questions - Faculty Web Sites at the University
... Mark the location on the Earth where people are now experiencing sunset. For these observers, which object, the Moon or Mars, will rise first above the eastern horizon? Draw in on the diagram an arrowhead to show the direction in which the Earth is moving around the Sun. Mark the approximate positio ...
... Mark the location on the Earth where people are now experiencing sunset. For these observers, which object, the Moon or Mars, will rise first above the eastern horizon? Draw in on the diagram an arrowhead to show the direction in which the Earth is moving around the Sun. Mark the approximate positio ...
Slide 1
... • Typical time scale for a stellar event is 1 to 2 months. • If the ’lens’ star has a planet, its gravity may also contribute to lensing the light from the ’source’. • This produces a secondary peak in the light curve. • Typical exoplanetary deviation lasts only hours to days. ...
... • Typical time scale for a stellar event is 1 to 2 months. • If the ’lens’ star has a planet, its gravity may also contribute to lensing the light from the ’source’. • This produces a secondary peak in the light curve. • Typical exoplanetary deviation lasts only hours to days. ...
pdf file
... because, although the amount of cometary material is fairly well constrained (probably better than a factor of 2), the amount of asteroidal material is not well known (and could be outside the range reported above), because we do not have good estimates of the mass distribution in the asteroid belt ...
... because, although the amount of cometary material is fairly well constrained (probably better than a factor of 2), the amount of asteroidal material is not well known (and could be outside the range reported above), because we do not have good estimates of the mass distribution in the asteroid belt ...
Presentation
... distance from the Sun to the square of its orbital period is the same for each planet. ...
... distance from the Sun to the square of its orbital period is the same for each planet. ...
LETTERS
... because, although the amount of cometary material is fairly well constrained (probably better than a factor of 2), the amount of asteroidal material is not well known (and could be outside the range reported above), because we do not have good estimates of the mass distribution in the asteroid belt ...
... because, although the amount of cometary material is fairly well constrained (probably better than a factor of 2), the amount of asteroidal material is not well known (and could be outside the range reported above), because we do not have good estimates of the mass distribution in the asteroid belt ...
life
... L = Mean lifetime of intelligent life = 100 – 109 years •We have the ability to destroy civilization •We are also damaging our environment •We are using up non-renewable resources •Civilizations may “mature” – some evidence •Sustainable civilizations is technically possible ...
... L = Mean lifetime of intelligent life = 100 – 109 years •We have the ability to destroy civilization •We are also damaging our environment •We are using up non-renewable resources •Civilizations may “mature” – some evidence •Sustainable civilizations is technically possible ...
Ice Giant Neptune Frontlines Potentially Hazardous Asteroid
... fourth largest planet by diameter, and is 17 times the mass of the Earth. Neptune has 14 known moons with the final one discovered just last year. Its largest moon Triton is 1,680 miles (2,700 km) across. In comparison, the diameter of our Moon is 2159 miles (3,474 km). ...
... fourth largest planet by diameter, and is 17 times the mass of the Earth. Neptune has 14 known moons with the final one discovered just last year. Its largest moon Triton is 1,680 miles (2,700 km) across. In comparison, the diameter of our Moon is 2159 miles (3,474 km). ...
Definition of planet
The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies. Greek astronomers employed the term asteres planetai (ἀστέρες πλανῆται), ""wandering stars"", for star-like objects which apparently moved over the sky. Over the millennia, the term has included a variety of different objects, from the Sun and the Moon to satellites and asteroids.By the end of the 19th century the word planet, though it had yet to be defined, had become a working term applied only to a small set of objects in the Solar System. After 1992, however, astronomers began to discover many additional objects beyond the orbit of Neptune, as well as hundreds of objects orbiting other stars. These discoveries not only increased the number of potential planets, but also expanded their variety and peculiarity. Some were nearly large enough to be stars, while others were smaller than Earth's moon. These discoveries challenged long-perceived notions of what a planet could be.The issue of a clear definition for planet came to a head in 2005 with the discovery of the trans-Neptunian object Eris, a body more massive than the smallest then-accepted planet, Pluto. In its 2006 response, the International Astronomical Union (IAU), recognised by astronomers as the world body responsible for resolving issues of nomenclature, released its decision on the matter. This definition, which applies only to the Solar System, states that a planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has ""cleared its neighbourhood"" of smaller objects around its orbit. Under this new definition, Pluto and the other trans-Neptunian objects do not qualify as planets. The IAU's decision has not resolved all controversies, and while many scientists have accepted the definition, some in the astronomical community have rejected it outright.