Why was Pluto once considered a planet?
... bodies orbiting the Sun beyond the orbit of Neptune. (134340) Pluto is a large member of the trans-Neptunian region (or Kuiper Belt) and is officially classified as a dwarf planet. ...
... bodies orbiting the Sun beyond the orbit of Neptune. (134340) Pluto is a large member of the trans-Neptunian region (or Kuiper Belt) and is officially classified as a dwarf planet. ...
The Project Gutenberg eBook #31344: Mathematical Geography
... in the upper grades of the elementary school. The subject has not been presented from the point of view of a little child, but an attempt has been made to keep its scope within the attainments of a student in a normal school, academy, or high school. If a very short course in mathematical geography ...
... in the upper grades of the elementary school. The subject has not been presented from the point of view of a little child, but an attempt has been made to keep its scope within the attainments of a student in a normal school, academy, or high school. If a very short course in mathematical geography ...
21trans-neptunian7s
... system is made up of many small icy bodies About 1000 found in the last 15 years Are organized into many different classes based on orbits Theories on their origin and evolution ...
... system is made up of many small icy bodies About 1000 found in the last 15 years Are organized into many different classes based on orbits Theories on their origin and evolution ...
Discovery and spectroscopy of the young Jovian planet
... emerged. The near-infrared colors of these planets are mostly red, indicating cloudy atmospheres reminiscent of brown dwarfs of spectral type L. Methane absorption features are prominent in the near-infrared spectra of T dwarfs (Teff <1100K), as well as the giant planets of our solar system, but so ...
... emerged. The near-infrared colors of these planets are mostly red, indicating cloudy atmospheres reminiscent of brown dwarfs of spectral type L. Methane absorption features are prominent in the near-infrared spectra of T dwarfs (Teff <1100K), as well as the giant planets of our solar system, but so ...
1. Estimate the average mass density of a sodium atom assuming its
... angle θ with the vertical. A student derives the following relation between q and v: tan θ = v and checks that the relation has a correct limit: as v → 0, ???? check symbol θ → 0, as expected. (We are assuming that there is no strong wind and that the rain falls vertically for a stationary man). Do ...
... angle θ with the vertical. A student derives the following relation between q and v: tan θ = v and checks that the relation has a correct limit: as v → 0, ???? check symbol θ → 0, as expected. (We are assuming that there is no strong wind and that the rain falls vertically for a stationary man). Do ...
Geosystems, 7e (Christopherson) Chapter 2 Solar Energy to Earth
... 14) Which of the following accurately describes Earth's distance from the Sun? A) The Earth-Sun distance averages 150 million kilometers (93 million miles). B) It takes light an average of 8 minutes and 20 seconds to travel from the Sun to Earth. C) Earth is closer to the Sun in January (perihelion) ...
... 14) Which of the following accurately describes Earth's distance from the Sun? A) The Earth-Sun distance averages 150 million kilometers (93 million miles). B) It takes light an average of 8 minutes and 20 seconds to travel from the Sun to Earth. C) Earth is closer to the Sun in January (perihelion) ...
On the irrelevance of being a PLUTO! Size Scale of Stars and Planets
... • Kuiper belt is probably the last stable location of the solar system where the escape velocity (~ 7 km/s) is much higher than rotation velocity (~ 5 km/s). Beyond this, the Sun’s gravity is too weak. • The Kuiper belt has to be studied in detail for information on early solar system and its edge. ...
... • Kuiper belt is probably the last stable location of the solar system where the escape velocity (~ 7 km/s) is much higher than rotation velocity (~ 5 km/s). Beyond this, the Sun’s gravity is too weak. • The Kuiper belt has to be studied in detail for information on early solar system and its edge. ...
Chapter 11 Gravity ∑
... hemisphere. This is the time of fastest orbital speed. Summer would be the time for minimum orbital speed. ...
... hemisphere. This is the time of fastest orbital speed. Summer would be the time for minimum orbital speed. ...
Collaborations with East Asian VLBI stations
... Target sources : Galactic masers (H2O@22GHz, SiO@43GHz) New aspect: dual-beam for phase-referencing ...
... Target sources : Galactic masers (H2O@22GHz, SiO@43GHz) New aspect: dual-beam for phase-referencing ...
Lightning climatology of exoplanets and brown dwarfs guided by
... in planetary discs. They suggested that lightning activity in stellar nebulae may affect the 16 O and δ 17 O production, which could lead to the observed, but not yet fully explained, non-equilibrium appearance of δ 17 O and δ 18 O isotopes in primitive meteorites. This paper presents an analysis of ...
... in planetary discs. They suggested that lightning activity in stellar nebulae may affect the 16 O and δ 17 O production, which could lead to the observed, but not yet fully explained, non-equilibrium appearance of δ 17 O and δ 18 O isotopes in primitive meteorites. This paper presents an analysis of ...
Other topics
... Scattered disc objects have high e and perihelion between 33 and 40 AU Centaurs have perihelion within 30 AU – source of Jupiter family comets Classical KBOs have low e and semimajor axes between 37 and 48 AU – future target of New Horizons Copenhagen 2015 (Lecture 3) ...
... Scattered disc objects have high e and perihelion between 33 and 40 AU Centaurs have perihelion within 30 AU – source of Jupiter family comets Classical KBOs have low e and semimajor axes between 37 and 48 AU – future target of New Horizons Copenhagen 2015 (Lecture 3) ...
Lecture 1: Life: How common? What is it? How can we find it?
... and changes its immediate (maybe even global) environment • Certain substances taken in (through ...
... and changes its immediate (maybe even global) environment • Certain substances taken in (through ...
October 2013 - Skyscrapers, Inc.
... at stars and saw their heroes in the constellations. In modern times, we do much the same, but our heroes are epic men of flesh and blood. Others will follow, and surely find their way home. Man’s search will not be denied. But these men were the first, and they will remain the foremost in our heart ...
... at stars and saw their heroes in the constellations. In modern times, we do much the same, but our heroes are epic men of flesh and blood. Others will follow, and surely find their way home. Man’s search will not be denied. But these men were the first, and they will remain the foremost in our heart ...
Comets
... nuclei is now called the Oort cloud. At the distance of the Oort cloud (now estimated to extend 3 light years from the Sun) cometary nuclei are so far from the Sun they cannot be observed, and their ices are preserved indefinitely in the cold of outer space. However, periodically, they are perturbed ...
... nuclei is now called the Oort cloud. At the distance of the Oort cloud (now estimated to extend 3 light years from the Sun) cometary nuclei are so far from the Sun they cannot be observed, and their ices are preserved indefinitely in the cold of outer space. However, periodically, they are perturbed ...
Lab Manual - Radford University
... will decrease the number of visible objects in the field of view. ⑤ On the left hand side of the window, you will see a number of tabs including Find and View Options. Click on the View Options tab. Inside of that you will see a number of sub-categories. Select Constellations. Turn on Stick Figures ...
... will decrease the number of visible objects in the field of view. ⑤ On the left hand side of the window, you will see a number of tabs including Find and View Options. Click on the View Options tab. Inside of that you will see a number of sub-categories. Select Constellations. Turn on Stick Figures ...
Part IV: Stars
... Neutrinos are subatomic particles produced in nuclear reactions. They move at nearly the speed of light and almost never interact with matter. Detectors on Earth found only about one-third of the neutrinos predicted by models of nuclear fusion in the Sun. This disagreement between theory and data wa ...
... Neutrinos are subatomic particles produced in nuclear reactions. They move at nearly the speed of light and almost never interact with matter. Detectors on Earth found only about one-third of the neutrinos predicted by models of nuclear fusion in the Sun. This disagreement between theory and data wa ...
Document
... • has sufficient mass for its self-gravity to overcome rigid body forces (is an idealization of a solid body of finite size in which deformation is neglected. In other words, the distance between any two given points of a rigid body remains constant in time regardless of external forces exerted on i ...
... • has sufficient mass for its self-gravity to overcome rigid body forces (is an idealization of a solid body of finite size in which deformation is neglected. In other words, the distance between any two given points of a rigid body remains constant in time regardless of external forces exerted on i ...
dynamical history of the asteroid belt and implications for terrestrial
... system, forming the well-known Kirkwood gaps (Kirkwood, 1867). In addition to the well known low-order mean motion resonances with Jupiter that form the Kirkwood gaps, there are numerous weak resonances that cause long term orbital chaos and transport asteroids out of the main belt (Morbidelli and N ...
... system, forming the well-known Kirkwood gaps (Kirkwood, 1867). In addition to the well known low-order mean motion resonances with Jupiter that form the Kirkwood gaps, there are numerous weak resonances that cause long term orbital chaos and transport asteroids out of the main belt (Morbidelli and N ...
ASTR 110 Lab Manual Sections M02 M03 M04
... for Neptune on the plot, it’s really hard to put the data for the nearby planets on the graph in any way that really lets you see what is going on for them! This situation comes up a lot in astronomy, where there is often a very large range in observed physical quantities. To overcome it, scientists ...
... for Neptune on the plot, it’s really hard to put the data for the nearby planets on the graph in any way that really lets you see what is going on for them! This situation comes up a lot in astronomy, where there is often a very large range in observed physical quantities. To overcome it, scientists ...
The Moon Tilt Illusion - Penn Engineering
... documents the illusion in an experiment involving 14 subjects by having them indicate their expectation of how the moon’s illumination should be oriented with respect to the position of the (visible) sun. He reports that an average discrepancy of 12◦ is perceived by the subjects between the observab ...
... documents the illusion in an experiment involving 14 subjects by having them indicate their expectation of how the moon’s illumination should be oriented with respect to the position of the (visible) sun. He reports that an average discrepancy of 12◦ is perceived by the subjects between the observab ...
Motions of the Celestial Sphere
... of a star follow an hour circle "straight down" from the star to the celestial equator. The angle from the vernal equinox eastward to the foot of that hour circle is the star's right ascension. • There is one oddity in right ascension: the unit used to report the angle. Right ascensions are always r ...
... of a star follow an hour circle "straight down" from the star to the celestial equator. The angle from the vernal equinox eastward to the foot of that hour circle is the star's right ascension. • There is one oddity in right ascension: the unit used to report the angle. Right ascensions are always r ...
Tides, planetary companions, and habitability
... For a two-planet system, the secular interactions can be characterized by two eigenmodes, each with an amplitude determined by the initial conditions (initial eccentricities and pericentre longitudes) of the two planets (e.g. Van Laerhoven & Greenberg 2012). For each eigenmode, the eigenvector deter ...
... For a two-planet system, the secular interactions can be characterized by two eigenmodes, each with an amplitude determined by the initial conditions (initial eccentricities and pericentre longitudes) of the two planets (e.g. Van Laerhoven & Greenberg 2012). For each eigenmode, the eigenvector deter ...
Orrery
An orrery is a mechanical model of the solar system that illustrates or predicts the relative positions and motions of the planets and moons, usually according to the heliocentric model. It may also represent the relative sizes of these bodies; but since accurate scaling is often not practical due to the actual large ratio differences, a subdued approximation may be used instead. Though the Greeks had working planetaria, the first orrery that was a planetarium of the modern era was produced in 1704, and one was presented to Charles Boyle, 4th Earl of Orrery — whence came the name. They are typically driven by a clockwork mechanism with a globe representing the Sun at the centre, and with a planet at the end of each of the arms.