High-precision abundances of elements in solar twin stars: Trends
... Context. High-precision determinations of abundances of elements in the atmospheres of the Sun and solar twin stars indicate that the Sun has an unusual low ratio between refractory and volatile elements. This has led to the suggestion that the relation between abundance ratios, [X/Fe], and elementa ...
... Context. High-precision determinations of abundances of elements in the atmospheres of the Sun and solar twin stars indicate that the Sun has an unusual low ratio between refractory and volatile elements. This has led to the suggestion that the relation between abundance ratios, [X/Fe], and elementa ...
The Norman Lockyer plate archive collection
... > would be relevant for discussion in the seminar? No, nothing that cannot be divined from studying the observing note-books (which I believe you also have?). It would be useful, for instance, to get a ball-park figure for how many plates there are in that collection, and to show (if you can) a slid ...
... > would be relevant for discussion in the seminar? No, nothing that cannot be divined from studying the observing note-books (which I believe you also have?). It would be useful, for instance, to get a ball-park figure for how many plates there are in that collection, and to show (if you can) a slid ...
gerard peter kuiper - National Academy of Sciences
... the 6,190-angstrom band of methane in Titan, the first detection of an atmosphere on a satellite. In 1944 he wrote, "It is of special interest that this atmosphere contains gases that are rich in hydrogen atoms; such gases had previously been associated with bodies having a large surface gravity." C ...
... the 6,190-angstrom band of methane in Titan, the first detection of an atmosphere on a satellite. In 1944 he wrote, "It is of special interest that this atmosphere contains gases that are rich in hydrogen atoms; such gases had previously been associated with bodies having a large surface gravity." C ...
comets
... This seminar discusses the basic principles of comets. We rst discuss their origin, classication and types of orbits. Short-period comets usually originate from trans-Neptunian region called Kuiper belt, and long-period comets originate from spherical region ∼ 105 AU away from the Sun called Oort ...
... This seminar discusses the basic principles of comets. We rst discuss their origin, classication and types of orbits. Short-period comets usually originate from trans-Neptunian region called Kuiper belt, and long-period comets originate from spherical region ∼ 105 AU away from the Sun called Oort ...
solar twins and solar analogues in galactic surveys
... Solar system. Finally in the late 16th century, Giordano Bruno said that the Sun is a star, like many others, being the first person in the modern age to come to that conclusion, for which he was burnt for heresy. It took another century for inventions like the telescope to help people understand th ...
... Solar system. Finally in the late 16th century, Giordano Bruno said that the Sun is a star, like many others, being the first person in the modern age to come to that conclusion, for which he was burnt for heresy. It took another century for inventions like the telescope to help people understand th ...
WAS THE SUN BORN IN A MASSIVE CLUSTER?
... that ∼(1/2) − (2/3) of stars are born in clusters larger than this.1 On the other hand, several authors have attempted to obtain upper limits on the birth cluster size by considering the effects of close encounters with other stars on the young solar system. Close encounters would perturb the solar ...
... that ∼(1/2) − (2/3) of stars are born in clusters larger than this.1 On the other hand, several authors have attempted to obtain upper limits on the birth cluster size by considering the effects of close encounters with other stars on the young solar system. Close encounters would perturb the solar ...
Grade 9 Space Review 50KB Nov 18 2009 10:52:00 AM
... 11. ANS: Not necessarily. Jupiter and Saturn, the two largest planets, have the shortest days. PTS: 1 REF: UC STA: UBC3 12. ANS: The density of Saturn is less than the density of water. If you can find enough water, Saturn will float on it! PTS: 1 REF: AS STA: UBC3 13. ANS: Earth's atmosphere is abo ...
... 11. ANS: Not necessarily. Jupiter and Saturn, the two largest planets, have the shortest days. PTS: 1 REF: UC STA: UBC3 12. ANS: The density of Saturn is less than the density of water. If you can find enough water, Saturn will float on it! PTS: 1 REF: AS STA: UBC3 13. ANS: Earth's atmosphere is abo ...
6th Grade Science
... around the sun creating phases of the Moon. The North and South Poles mark Earth’s axis. Earth rotates on its axis. This rotation gives the Earth daytime and nighttime. Earth completes one rotation every 24 hours. Another major movement of planets and moons is revolution-the circling of an object in ...
... around the sun creating phases of the Moon. The North and South Poles mark Earth’s axis. Earth rotates on its axis. This rotation gives the Earth daytime and nighttime. Earth completes one rotation every 24 hours. Another major movement of planets and moons is revolution-the circling of an object in ...
Unit 1 test review and answer key 16
... b) Any two (2) characteristics such as the following: - relatively small - have solid cores and rocky crusts - slow spinning - small orbits 114. ANS: a) A dwarf planet is a celestial object orbiting the Sun that is generally smaller than a planet but massive enough for its own gravity to give it a r ...
... b) Any two (2) characteristics such as the following: - relatively small - have solid cores and rocky crusts - slow spinning - small orbits 114. ANS: a) A dwarf planet is a celestial object orbiting the Sun that is generally smaller than a planet but massive enough for its own gravity to give it a r ...
DOWNLOAD THIS RESOURCE (6.3 MB Powerpoint Presentation)
... A COMET TALE: The Ort Cloud Our star (the sun) generates a solar wind containing charged particles and other gasses. • Solar wind interacts with interstellar gas and dust creating a “bow shock” • The bow shock region of space is considered the “city limit” of our solar system and the beginning of i ...
... A COMET TALE: The Ort Cloud Our star (the sun) generates a solar wind containing charged particles and other gasses. • Solar wind interacts with interstellar gas and dust creating a “bow shock” • The bow shock region of space is considered the “city limit” of our solar system and the beginning of i ...
The first focused hard X-ray images of the sun with
... NuSTAR average effective area (600 cm2 for both telescopes combined) is over ten times the RHESSI average effective area (45.6 cm2 for 8 RHESSI detector modules). Even more importantly, the background for the NuSTAR detectors ...
... NuSTAR average effective area (600 cm2 for both telescopes combined) is over ten times the RHESSI average effective area (45.6 cm2 for 8 RHESSI detector modules). Even more importantly, the background for the NuSTAR detectors ...
How we think the planets were born
... Asteroids are minor planets, especially those of the inner Solar System. The main Asteroid Belt lies between the orbits of Mars and Jupiter. ...
... Asteroids are minor planets, especially those of the inner Solar System. The main Asteroid Belt lies between the orbits of Mars and Jupiter. ...
A Thermodynamic History of the Solar Constitution — II
... Wilson would reaffirm his conviction while advancing an alternative for sunspots: “Dr. Stoney called attention to an action of this kind that might be due to clouds of transparent material, like clouds of water on the Earth, but in view of the high solar temperature it seems improbable that any body ...
... Wilson would reaffirm his conviction while advancing an alternative for sunspots: “Dr. Stoney called attention to an action of this kind that might be due to clouds of transparent material, like clouds of water on the Earth, but in view of the high solar temperature it seems improbable that any body ...
course objectives - Metropolitan Community College
... COURSE DESCRIPTION: This course is an introductory course in astronomy that covers the tools of astronomy, the night sky, the solar system, stars and star systems, galaxies, and cosmology. This is a lecture-only course. The lab course that complements this course is SCIE 1310. ...
... COURSE DESCRIPTION: This course is an introductory course in astronomy that covers the tools of astronomy, the night sky, the solar system, stars and star systems, galaxies, and cosmology. This is a lecture-only course. The lab course that complements this course is SCIE 1310. ...
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 ...
Formation of the Solar System
... © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
... © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
A Perspective from Extinct Radionuclides on a Young
... Sm (t1/2 = 103 Myr), were inherited from the long-term chemical evolution of the Galaxy (Clayton 1988, Nittler & Dauphas 2006). Others, such as 26 Al (t1/2 = 0.717 Myr), were produced in one or several nearby stars and were mixed with solar system material shortly before formation of planetary bodie ...
... Sm (t1/2 = 103 Myr), were inherited from the long-term chemical evolution of the Galaxy (Clayton 1988, Nittler & Dauphas 2006). Others, such as 26 Al (t1/2 = 0.717 Myr), were produced in one or several nearby stars and were mixed with solar system material shortly before formation of planetary bodie ...
Core instability models of giant planet accretion – II. Forming
... for the changes in the dynamic of the planetesimals, and also considering the collisions between embryos as a very important source of growth, as was shown by Brunini & Benvenuto (2008). In the core instability model the first step in the planetary formation is the coagulation of dust particles. Whe ...
... for the changes in the dynamic of the planetesimals, and also considering the collisions between embryos as a very important source of growth, as was shown by Brunini & Benvenuto (2008). In the core instability model the first step in the planetary formation is the coagulation of dust particles. Whe ...
Planet Formation in the Outer Solar System
... 1997), bringing the initial surface density in the Kuiper belt within range of the S ∝ A⫺3/2 line. If these estimates are correct, the total mass of the minimum-mass solar nebula is ∼0.01 M, for an outer radius of ∼100 AU, close to the median mass for circumstellar disks surrounding young stars in n ...
... 1997), bringing the initial surface density in the Kuiper belt within range of the S ∝ A⫺3/2 line. If these estimates are correct, the total mass of the minimum-mass solar nebula is ∼0.01 M, for an outer radius of ∼100 AU, close to the median mass for circumstellar disks surrounding young stars in n ...
8-4.9 - S2TEM Centers SC
... 2. Ask them to share what they know about it. 3. Make sure they are aware that a galaxy is a very large collection of stars, dust, and gas held together by the force of gravity. They should also be aware that not all galaxies look the same. 4. Provide students with copies of the activity sheet and t ...
... 2. Ask them to share what they know about it. 3. Make sure they are aware that a galaxy is a very large collection of stars, dust, and gas held together by the force of gravity. They should also be aware that not all galaxies look the same. 4. Provide students with copies of the activity sheet and t ...
astro7a_sun_shortv3
... How many years will the Sun continue shining? Is the Sun’s light output constant, or variable? What doesn’t the Sun contract, due to its gravity? How did the Sun form ? What are sunspots? And those loops on the surface? What is the “sunspot cycle”? What is the Sun made of? Does the Sun have layers i ...
... How many years will the Sun continue shining? Is the Sun’s light output constant, or variable? What doesn’t the Sun contract, due to its gravity? How did the Sun form ? What are sunspots? And those loops on the surface? What is the “sunspot cycle”? What is the Sun made of? Does the Sun have layers i ...
Full text - FNWI (Science) Education Service Centre
... When the planets in the solar system had fully formed, it is believed that many small solid bodies remained in the planetary regions. Most of these so called ‘planetisimals’ in the region of the giant planets were likely to contain volatiles such as (water)ice. In the early years of the solar system ...
... When the planets in the solar system had fully formed, it is believed that many small solid bodies remained in the planetary regions. Most of these so called ‘planetisimals’ in the region of the giant planets were likely to contain volatiles such as (water)ice. In the early years of the solar system ...
Short-period comets
... • Nowadays, the Kuiper belt is believed to be the main source for short-period comets. It is a region of the Solar System between 30 AU to ~55 AU from the Sun. The Kuiper belt is similar to the main-belt asteroid that consists of small bodies. • The most widely-accepted hypothesis of its formation ...
... • Nowadays, the Kuiper belt is believed to be the main source for short-period comets. It is a region of the Solar System between 30 AU to ~55 AU from the Sun. The Kuiper belt is similar to the main-belt asteroid that consists of small bodies. • The most widely-accepted hypothesis of its formation ...
Earth is between the Sun and the Moon.
... Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley ...
... Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley ...
W. M. White Geochemistry Chapter 10: Cosmochemistry
... we learn about the evolution of the Earth by examining old rocks, we can learn about the evolution of the cosmos by looking at old stars. The old stars of Population II are considerably poorer in heavy elements than are young stars. In particular, Population II stars have a Fe/H ratio typically a fa ...
... we learn about the evolution of the Earth by examining old rocks, we can learn about the evolution of the cosmos by looking at old stars. The old stars of Population II are considerably poorer in heavy elements than are young stars. In particular, Population II stars have a Fe/H ratio typically a fa ...
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.