Basic Information about the Solar System Handout
... about 300,000 km per second). We are beginning to find that many stars besides the Sun harbor their own "solar systems" with planets, which are being called extrasolar planets, or exoplanets. As of early February 2011, astronomers have detected a total of 510 planets orbiting other stars. This numbe ...
... about 300,000 km per second). We are beginning to find that many stars besides the Sun harbor their own "solar systems" with planets, which are being called extrasolar planets, or exoplanets. As of early February 2011, astronomers have detected a total of 510 planets orbiting other stars. This numbe ...
Stellar parallax-aberration is geocentric
... and not found in the Bible. In this model the earth is a universal sink for starlight and might be expected to heat up too much over cosmological time. This same objection was brought to bear against Le Sagean type gravity. The answer to both is: that the earth was created to last for 7,000 years an ...
... and not found in the Bible. In this model the earth is a universal sink for starlight and might be expected to heat up too much over cosmological time. This same objection was brought to bear against Le Sagean type gravity. The answer to both is: that the earth was created to last for 7,000 years an ...
13_Lecture_Outline
... passes in front of another star. • Features in Dust Disks: Gaps, waves, or ripples in disks of dusty gas around stars can indicate presence of planets. © 2010 Pearson Education, Inc. ...
... passes in front of another star. • Features in Dust Disks: Gaps, waves, or ripples in disks of dusty gas around stars can indicate presence of planets. © 2010 Pearson Education, Inc. ...
Astronomy Today 7th Edition Chaisson/McMillan
... Nebular contraction is followed by condensation around dust grains, known to exist in interstellar clouds such as the one shown here. Accretion then leads to larger and larger clumps; finally gravitational attraction takes over and planets form. © 2011 Pearson Education, Inc. ...
... Nebular contraction is followed by condensation around dust grains, known to exist in interstellar clouds such as the one shown here. Accretion then leads to larger and larger clumps; finally gravitational attraction takes over and planets form. © 2011 Pearson Education, Inc. ...
Chapter 6
... Nebular contraction is followed by condensation around dust grains, known to exist in interstellar clouds such as the one shown here. Accretion then leads to larger and larger clumps; finally gravitational attraction takes over and planets form. © 2011 Pearson Education, Inc. ...
... Nebular contraction is followed by condensation around dust grains, known to exist in interstellar clouds such as the one shown here. Accretion then leads to larger and larger clumps; finally gravitational attraction takes over and planets form. © 2011 Pearson Education, Inc. ...
Chapter 13 Power Point Lecture
... • Planets are close to their stars, relative to the distance from us to the star. – This is like being in San Francisco and trying to see a pinhead 15 meters from a grapefruit in Washington, D.C. ...
... • Planets are close to their stars, relative to the distance from us to the star. – This is like being in San Francisco and trying to see a pinhead 15 meters from a grapefruit in Washington, D.C. ...
canopus e.g procyon
... • Proxima Centauri – closest of the triplet of stars loosely known as alpha-Centauri Proxima Centauri is a faint red star that orbits Alpha-Centauri A and B with a period of about one million years. Proxima Centauri is 4.22 light years from the Earth (now) and about 0.24 light years from Alpha-Cent ...
... • Proxima Centauri – closest of the triplet of stars loosely known as alpha-Centauri Proxima Centauri is a faint red star that orbits Alpha-Centauri A and B with a period of about one million years. Proxima Centauri is 4.22 light years from the Earth (now) and about 0.24 light years from Alpha-Cent ...
taken from horizons 7th edition chapter 1 tutorial quiz
... c. Filaments are the largest structures known. d. Planets have never been discovered orbiting other stars. answer: c ...
... c. Filaments are the largest structures known. d. Planets have never been discovered orbiting other stars. answer: c ...
AN INTRODUCTION TO ASTRONOMY Dr. Uri Griv Department of Physics, Ben-Gurion University
... along with a brief explanation written by a professional astronomer. 2001 October 4 ...
... along with a brief explanation written by a professional astronomer. 2001 October 4 ...
Solar System Formation Reading
... objects, protoplanets. Quite quickly (in less than 100 million years - that's short compared to the 4.5 billion year age of the solar system) the collision and coalescence leads to a few large objects that orbit in roughly circular orbits, with a fair amount of junk in between. At some point all of ...
... objects, protoplanets. Quite quickly (in less than 100 million years - that's short compared to the 4.5 billion year age of the solar system) the collision and coalescence leads to a few large objects that orbit in roughly circular orbits, with a fair amount of junk in between. At some point all of ...
PHYS3380_102615_bw
... We have observed disks around other stars. These could be new planetary systems in formation. ...
... We have observed disks around other stars. These could be new planetary systems in formation. ...
Astronomy Exam Notes.docx
... d. the photoelectric effect can be create vacuum energy 19. the light from distant galaxies is redshifted because a. they are moving through space b. the wavelengths are stretched by the expansion of space c. their lookback times are less d. the stars in them are older at these lookback times 20. th ...
... d. the photoelectric effect can be create vacuum energy 19. the light from distant galaxies is redshifted because a. they are moving through space b. the wavelengths are stretched by the expansion of space c. their lookback times are less d. the stars in them are older at these lookback times 20. th ...
Debris Belts around Vega - Astronomical Society of the Pacific
... • Scientists have found other stars with similar inner and outer debris belts, with the outer belt about ten times farther from the stars than the inner belt. • One such star, HR8799, has been found to have four giant planets orbiting in the gap between belts. • Our own solar system also has four ...
... • Scientists have found other stars with similar inner and outer debris belts, with the outer belt about ten times farther from the stars than the inner belt. • One such star, HR8799, has been found to have four giant planets orbiting in the gap between belts. • Our own solar system also has four ...
Gravitational redshifts
... synthetic line profiles) are shorter than laboratory values due to convective blueshift. Curves before and after mid-transit (µ = 0.21, 0.59, 0.87) are not exact mirror images due to intrinsic stellar line asymmetries. This simulation from a CO5BOLD model predicts the behavior of an Fe I line ( 620 ...
... synthetic line profiles) are shorter than laboratory values due to convective blueshift. Curves before and after mid-transit (µ = 0.21, 0.59, 0.87) are not exact mirror images due to intrinsic stellar line asymmetries. This simulation from a CO5BOLD model predicts the behavior of an Fe I line ( 620 ...
Solutions to Homework #4, AST 203, Spring 2009
... value seems wrong, take three points off. Answers differing slightly from the solutions given here because of slightly different rounding (e.g., off in the second decimal point for results that should be given to two significant figures) get full credit. Two points off per question for not being exp ...
... value seems wrong, take three points off. Answers differing slightly from the solutions given here because of slightly different rounding (e.g., off in the second decimal point for results that should be given to two significant figures) get full credit. Two points off per question for not being exp ...
Sirius Astronomer - Orange County Astronomers
... in a comet, supporting the theory that the material in the polar lunar craters was put there by comet impacts. However there is some evidence for outgassing from the Moon, solar wind and other sources for the material. Water (mostly as ice) is not uniformly distributed within the shadowed cold traps ...
... in a comet, supporting the theory that the material in the polar lunar craters was put there by comet impacts. However there is some evidence for outgassing from the Moon, solar wind and other sources for the material. Water (mostly as ice) is not uniformly distributed within the shadowed cold traps ...
PDF only - at www.arxiv.org.
... when we inhibit the photolysis of O3, H2O2, and HO2 in the solar UV case, ...
... when we inhibit the photolysis of O3, H2O2, and HO2 in the solar UV case, ...
Solar System - HMXEarthScience
... 11. Which diagram best represents a portion of the heliocentric model of the solar system? [S = Sun, E = Earth, and M = Moon] A) ...
... 11. Which diagram best represents a portion of the heliocentric model of the solar system? [S = Sun, E = Earth, and M = Moon] A) ...
1Space (Leah)
... pretty important planet, but in fact we live on a piece of dirt. Our Solar System is really just the sun with a few pieces left over, and we live on one of those pieces ...
... pretty important planet, but in fact we live on a piece of dirt. Our Solar System is really just the sun with a few pieces left over, and we live on one of those pieces ...
FREE Sample Here
... • Distinguish among galaxies, stars, and planets, and locate Earth. 1. Describe the Sun’s status among stars in the Milky Way Galaxy. Describe the Sun’s location, size, and relationship to its planets. Our Sun is both unique to us and commonplace in our galaxy. It is only average in temperature, siz ...
... • Distinguish among galaxies, stars, and planets, and locate Earth. 1. Describe the Sun’s status among stars in the Milky Way Galaxy. Describe the Sun’s location, size, and relationship to its planets. Our Sun is both unique to us and commonplace in our galaxy. It is only average in temperature, siz ...
Linking Asteroids and Meteorites through Reflectance
... Protostar • The dense cloud fragment gets hotter as it contracts • The cloud becomes denser and radiation cannot escape • The thermal pressure and gas temperature start to rise and rise • The dense cloud fragment becomes a protostar ...
... Protostar • The dense cloud fragment gets hotter as it contracts • The cloud becomes denser and radiation cannot escape • The thermal pressure and gas temperature start to rise and rise • The dense cloud fragment becomes a protostar ...
ISIMA lectures on celestial mechanics. 3
... empirical theoretical tools for predicting whether a given planetary system is stable—or, more precisely, what is its lifetime before some catastrophic event such as a collision or ejection—without having to integrate the planetary orbits for the lifetime of the host star. There are two discouraging ...
... empirical theoretical tools for predicting whether a given planetary system is stable—or, more precisely, what is its lifetime before some catastrophic event such as a collision or ejection—without having to integrate the planetary orbits for the lifetime of the host star. There are two discouraging ...
![arXiv:0905.3008v1 [astro-ph.EP] 19 May 2009](http://s1.studyres.com/store/data/017089867_1-59d3a66da8f73e76d7a42b1bdf6b26f3-300x300.png)
arXiv:0905.3008v1 [astro-ph.EP] 19 May 2009
... In this paper, we considered the secular increase of astronomical unit recently reported by Krasinsky and Brumberg (2004), and suggested a possible explanation for this secular trend by means of the conservation law of total angular momentum. Assuming the existence of some tidal interactions that tr ...
... In this paper, we considered the secular increase of astronomical unit recently reported by Krasinsky and Brumberg (2004), and suggested a possible explanation for this secular trend by means of the conservation law of total angular momentum. Assuming the existence of some tidal interactions that tr ...
Planetary habitability
Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and sustain life. Life may develop directly on a planet or satellite or be transferred to it from another body, a theoretical process known as panspermia. As the existence of life beyond Earth is unknown, planetary habitability is largely an extrapolation of conditions on Earth and the characteristics of the Sun and Solar System which appear favourable to life's flourishing—in particular those factors that have sustained complex, multicellular organisms and not just simpler, unicellular creatures. Research and theory in this regard is a component of planetary science and the emerging discipline of astrobiology.An absolute requirement for life is an energy source, and the notion of planetary habitability implies that many other geophysical, geochemical, and astrophysical criteria must be met before an astronomical body can support life. In its astrobiology roadmap, NASA has defined the principal habitability criteria as ""extended regions of liquid water, conditions favourable for the assembly of complex organic molecules, and energy sources to sustain metabolism.""In determining the habitability potential of a body, studies focus on its bulk composition, orbital properties, atmosphere, and potential chemical interactions. Stellar characteristics of importance include mass and luminosity, stable variability, and high metallicity. Rocky, terrestrial-type planets and moons with the potential for Earth-like chemistry are a primary focus of astrobiological research, although more speculative habitability theories occasionally examine alternative biochemistries and other types of astronomical bodies.The idea that planets beyond Earth might host life is an ancient one, though historically it was framed by philosophy as much as physical science. The late 20th century saw two breakthroughs in the field. The observation and robotic spacecraft exploration of other planets and moons within the Solar System has provided critical information on defining habitability criteria and allowed for substantial geophysical comparisons between the Earth and other bodies. The discovery of extrasolar planets, beginning in the early 1990s and accelerating thereafter, has provided further information for the study of possible extraterrestrial life. These findings confirm that the Sun is not unique among stars in hosting planets and expands the habitability research horizon beyond the Solar System.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently. On 4 November 2013, astronomers reported, based on Kepler space mission data, that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs within the Milky Way. 11 billion of these estimated planets may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists.