The Planets
... and finally, tiny Pluto (a dwarf planet). Jupiter is so big that all the other planets could fit inside it. The Inner Planets vs. the Outer Planets The inner planets (those planets that orbit close to the sun) are quite different from the outer planets (those planets that orbit far from the sun). ...
... and finally, tiny Pluto (a dwarf planet). Jupiter is so big that all the other planets could fit inside it. The Inner Planets vs. the Outer Planets The inner planets (those planets that orbit close to the sun) are quite different from the outer planets (those planets that orbit far from the sun). ...
Search for Life in the Universe
... – Resolution: not an issue, observe only the star – Amplitude: problem, e.g., at a distance of 10 ly, the amplitude of the solar motion due to Jupiter is 0.003 – Angular motion 1/distance harder for distant stars – Angular motion orbital radius easier for outlying planets, but orbital peri ...
... – Resolution: not an issue, observe only the star – Amplitude: problem, e.g., at a distance of 10 ly, the amplitude of the solar motion due to Jupiter is 0.003 – Angular motion 1/distance harder for distant stars – Angular motion orbital radius easier for outlying planets, but orbital peri ...
Astro 10: Introductory Astronomy
... “Slow” Core Accretion goes faster when gravity gets strong enough, but… • Once the core grows past ~0.5-1 mile across, gravity becomes significant and accelerates the process. • Growth rate goes as radius to the 4th power (for constant density). • So, those cores which get to the self-gravity point ...
... “Slow” Core Accretion goes faster when gravity gets strong enough, but… • Once the core grows past ~0.5-1 mile across, gravity becomes significant and accelerates the process. • Growth rate goes as radius to the 4th power (for constant density). • So, those cores which get to the self-gravity point ...
Lecture 1: Observations of planetary systems
... We reside in our own planetary system, and much of what we know about planets and their origin comes from observations of the Solar System. The Solar System comprises the Sun, eight planets, and a large number of smaller bodies (including “dwarf planets”, asteroids, comets, etc.). The eight planets ...
... We reside in our own planetary system, and much of what we know about planets and their origin comes from observations of the Solar System. The Solar System comprises the Sun, eight planets, and a large number of smaller bodies (including “dwarf planets”, asteroids, comets, etc.). The eight planets ...
Astrophysics 2012_2013 Grade 10 – Our Solar System
... Johann Gottfried Galle (assisted by Heinrich Louis d'Arrest), working from Le Verrier's calculations. It was a sensational moment of 19th century science and dramatic confirmation of Newtonian gravitational theory. In François Arago's apt phrase, Le Verrier had discovered a planet "with the point of ...
... Johann Gottfried Galle (assisted by Heinrich Louis d'Arrest), working from Le Verrier's calculations. It was a sensational moment of 19th century science and dramatic confirmation of Newtonian gravitational theory. In François Arago's apt phrase, Le Verrier had discovered a planet "with the point of ...
Possibilities for life elsewhere in the Solar System In our fifth
... a mission to Europa to drill through the ice and extract samples of the water to search for life. These are fairly pie in the sky at the moment; I invite you, for example, to think about how best to drill through a several mile thick layer of ice (there are ways, but it is not clear how one would th ...
... a mission to Europa to drill through the ice and extract samples of the water to search for life. These are fairly pie in the sky at the moment; I invite you, for example, to think about how best to drill through a several mile thick layer of ice (there are ways, but it is not clear how one would th ...
Astronomy Library wk 4 .cwk (WP)
... However, because the orbits are actually elliptical, the Also, provides natural explanations for many aspects of the planetary motions which are puzzling in model still used some small epicycles. Ptolemy’s system: Why does the sun’s period (1 year) show up in all of the other planet’s motions in Pto ...
... However, because the orbits are actually elliptical, the Also, provides natural explanations for many aspects of the planetary motions which are puzzling in model still used some small epicycles. Ptolemy’s system: Why does the sun’s period (1 year) show up in all of the other planet’s motions in Pto ...
Astronomy Club of Asheville July 2016 Sky Events
... Against the background of the constellation Leo, Jupiter is best viewed early in the evening this month, before it sets in the west. Mars, although rapidly fading, remains in great viewing position this month – high in the sky for most of the night in the constellation Libra. The planet Saturn ...
... Against the background of the constellation Leo, Jupiter is best viewed early in the evening this month, before it sets in the west. Mars, although rapidly fading, remains in great viewing position this month – high in the sky for most of the night in the constellation Libra. The planet Saturn ...
The mystery of cosmic oceans and dunes Earth
... Planetary formation simulations Planets are understood to form alongside stars. As matter condenses under gravity to form the star, the surrounding circulating matter begins to flatten into a protoplanetary disk, a little like a spun clump of dough flattening to form a pizza base. Matter in this dis ...
... Planetary formation simulations Planets are understood to form alongside stars. As matter condenses under gravity to form the star, the surrounding circulating matter begins to flatten into a protoplanetary disk, a little like a spun clump of dough flattening to form a pizza base. Matter in this dis ...
Testing
... Earth-like planets that cross in front of their stars (Kepler to launch in 2008) – Astrometric missions will be capable of measuring the “wobble” of a star caused by an orbiting Earth-like planet – Missions for direct detection of an Earth-like planet will need to use special techniques (like ...
... Earth-like planets that cross in front of their stars (Kepler to launch in 2008) – Astrometric missions will be capable of measuring the “wobble” of a star caused by an orbiting Earth-like planet – Missions for direct detection of an Earth-like planet will need to use special techniques (like ...
The Transformation of Gas Giant Planets into Rocky Planets
... In this regard, I should mention the theory of Oliver Manuel who argues that the Sun has an iron core. Without going into the details of his theory, the general idea is that the Sun and the Solar System formed from an already existing stellar object that went supernova. The Sun formed around the so ...
... In this regard, I should mention the theory of Oliver Manuel who argues that the Sun has an iron core. Without going into the details of his theory, the general idea is that the Sun and the Solar System formed from an already existing stellar object that went supernova. The Sun formed around the so ...
Chapter 2 Astronomy Notes
... moons, the plutinos, and all other objects close to its orbit. In 2003, the IAU had also released an official statement that differentiated planets from stars and other massive objects. This is the part of the statement that pertains to planets: Objects with true masses below the limiting mass for t ...
... moons, the plutinos, and all other objects close to its orbit. In 2003, the IAU had also released an official statement that differentiated planets from stars and other massive objects. This is the part of the statement that pertains to planets: Objects with true masses below the limiting mass for t ...
Exam 1 Review
... scientists know the properties of the Earth’s interior? Do you know what types of geologic formations are located above the three different plate boundaries? Can you describe the basic structure of the Earth’s atmosphere? Do you understand how the ozone layer prevents UV photons from getting to the ...
... scientists know the properties of the Earth’s interior? Do you know what types of geologic formations are located above the three different plate boundaries? Can you describe the basic structure of the Earth’s atmosphere? Do you understand how the ozone layer prevents UV photons from getting to the ...
Protostars and planets
... known were those in the Solar System: the most massive of them is only MJupiter ≈ 10−3 M⊙ , and there are many of them follow approximately circular orbits about the Sun (indeed “planet” comes from Greek “wanderer” because planets appear to move through the fixed stars). Classifications based on mas ...
... known were those in the Solar System: the most massive of them is only MJupiter ≈ 10−3 M⊙ , and there are many of them follow approximately circular orbits about the Sun (indeed “planet” comes from Greek “wanderer” because planets appear to move through the fixed stars). Classifications based on mas ...
Extrasolar planets Topics to be covered Planets and brown dwarfs
... resembles that of the Sun: who’s to say that Jupiter is not simply a “failed star” rather than a planet? • The discovery of low-mass binary stars would be interesting, but (perhaps) not as exciting as discovering new “true” planets. • Is there a natural boundary between planets and stars? ...
... resembles that of the Sun: who’s to say that Jupiter is not simply a “failed star” rather than a planet? • The discovery of low-mass binary stars would be interesting, but (perhaps) not as exciting as discovering new “true” planets. • Is there a natural boundary between planets and stars? ...
Quiz4 - UNLV Physics
... A) It is the same size and mass. B) It is about 10 times larger both in size and mass. C) It is about 10 times larger in size and the same mass. D) It is about the same size but is 10 times more massive. E) Jupiter doesn't have a core!it is made entirely from hydrogen and helium. Answer: D ...
... A) It is the same size and mass. B) It is about 10 times larger both in size and mass. C) It is about 10 times larger in size and the same mass. D) It is about the same size but is 10 times more massive. E) Jupiter doesn't have a core!it is made entirely from hydrogen and helium. Answer: D ...
Our Solar System
... Now Charon will continue to be considered Pluto's satellite, and the three other worlds will be dubbed "dwarf planets" rather than full-fledged planets. The planets are drawn to scale, but without correct relative distances. Mrs. Degl ...
... Now Charon will continue to be considered Pluto's satellite, and the three other worlds will be dubbed "dwarf planets" rather than full-fledged planets. The planets are drawn to scale, but without correct relative distances. Mrs. Degl ...
Earth Science Library wk 2 (WP)
... into it maintaining that Copernicus did not mean to suggest that the Earth actually moved, but rather that the model was a convenient mathematical tool for determining planetary positions. ...
... into it maintaining that Copernicus did not mean to suggest that the Earth actually moved, but rather that the model was a convenient mathematical tool for determining planetary positions. ...
report
... 11. The next day in class, have a group discussion of what they discovered. Review the homework and have one cutout of the sun ( which would be 76.7 inches in diameter relative to the cutouts that they used in their activity). 12. Wrap up the assignment with a discussion of the ...
... 11. The next day in class, have a group discussion of what they discovered. Review the homework and have one cutout of the sun ( which would be 76.7 inches in diameter relative to the cutouts that they used in their activity). 12. Wrap up the assignment with a discussion of the ...
1. How can we detect extra-solar planets?
... Main sequence stars obey an approximate mass– luminosity relation ...
... Main sequence stars obey an approximate mass– luminosity relation ...
Document
... By assembling and using the solar system flip book, students realize that the four planets closest to the Sun (Mercury, Venus, Earth and Mars) revolve around the Sun in the same direction, albeit at different speeds. Students use this visual information, along with a table showing the orbital period ...
... By assembling and using the solar system flip book, students realize that the four planets closest to the Sun (Mercury, Venus, Earth and Mars) revolve around the Sun in the same direction, albeit at different speeds. Students use this visual information, along with a table showing the orbital period ...
Your Birthday on Another Planet
... By assembling and using the solar system flip book, students realize that the four planets closest to the Sun (Mercury, Venus, Earth and Mars) revolve around the Sun in the same direction, albeit at different speeds. Students use this visual information, along with a table showing the orbital period ...
... By assembling and using the solar system flip book, students realize that the four planets closest to the Sun (Mercury, Venus, Earth and Mars) revolve around the Sun in the same direction, albeit at different speeds. Students use this visual information, along with a table showing the orbital period ...
`A ship flying in space:` Earth seen through the eyes of an astronaut
... Planets about the same distance from their parent stars as Earth take roughly a year to complete an orbit. Scientists want to see at least three transits to be able to rule out other explanations for fluctuations in a star’s light, such as small companion stars. Results also are verified by ground a ...
... Planets about the same distance from their parent stars as Earth take roughly a year to complete an orbit. Scientists want to see at least three transits to be able to rule out other explanations for fluctuations in a star’s light, such as small companion stars. Results also are verified by ground a ...
AST 301 Fall 2007 AST 301: Review for Exam 3 This exam covers
... Chapter 15: This chapter is continuous with Chapter 6 because it is concerned with developing a theoretical model that can explain most of the features of our solar system that we read about in Chapter 6. I suggest you try testing your understanding of the material by telling a friend (imaginary or ...
... Chapter 15: This chapter is continuous with Chapter 6 because it is concerned with developing a theoretical model that can explain most of the features of our solar system that we read about in Chapter 6. I suggest you try testing your understanding of the material by telling a friend (imaginary or ...
Are there Earth-like planets around other stars?
... for changes in the position of spectral lines from the star and is most sensitive to very big planets in very small orbits. Most of the many other techniques that are now used to search for extrasolar planets are also mainly sensitive to planets that are very different from the planets in our Solar ...
... for changes in the position of spectral lines from the star and is most sensitive to very big planets in very small orbits. Most of the many other techniques that are now used to search for extrasolar planets are also mainly sensitive to planets that are very different from the planets in our Solar ...
Planet
A planet (from Ancient Greek ἀστήρ πλανήτης (astēr planētēs), or πλάνης ἀστήρ (plánēs astēr), meaning ""wandering star"") is an astronomical object orbiting a star, brown dwarf, or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate objects. In 2006, the International Astronomical Union (IAU) officially adopted a resolution defining planets within the Solar System. This definition is controversial because it excludes many objects of planetary mass based on where or what they orbit. Although eight of the planetary bodies discovered before 1950 remain ""planets"" under the modern definition, some celestial bodies, such as Ceres, Pallas, Juno, Vesta (each an object in the solar asteroid belt), and Pluto (the first trans-Neptunian object discovered), that were once considered planets by the scientific community are no longer viewed as such.The planets were thought by Ptolemy to orbit Earth in deferent and epicycle motions. Although the idea that the planets orbited the Sun had been suggested many times, it was not until the 17th century that this view was supported by evidence from the first telescopic astronomical observations, performed by Galileo Galilei. By careful analysis of the observation data, Johannes Kepler found the planets' orbits were not circular but elliptical. As observational tools improved, astronomers saw that, like Earth, the planets rotated around tilted axes, and some shared such features as ice caps and seasons. Since the dawn of the Space Age, close observation by space probes has found that Earth and the other planets share characteristics such as volcanism, hurricanes, tectonics, and even hydrology.Planets are generally divided into two main types: large low-density giant planets, and smaller rocky terrestrials. Under IAU definitions, there are eight planets in the Solar System. In order of increasing distance from the Sun, they are the four terrestrials, Mercury, Venus, Earth, and Mars, then the four giant planets, Jupiter, Saturn, Uranus, and Neptune. Six of the planets are orbited by one or more natural satellites.More than a thousand planets around other stars (""extrasolar planets"" or ""exoplanets"") have been discovered in the Milky Way: as of 1 October 2015, 1968 known extrasolar planets in 1248 planetary systems (including 490 multiple planetary systems), ranging in size from just above the size of the Moon to gas giants about twice as large as Jupiter. On December 20, 2011, the Kepler Space Telescope team reported the discovery of the first Earth-sized extrasolar planets, Kepler-20e and Kepler-20f, orbiting a Sun-like star, Kepler-20. A 2012 study, analyzing gravitational microlensing data, estimates an average of at least 1.6 bound planets for every star in the Milky Way.Around one in five Sun-like stars is thought to have an Earth-sized planet in its habitable zone.