ORBITAL MOTION
... Stage 5. A shock wave forms at the outer edge of the first core. The first core accretes from the envelope through this shock. The temperature continues to rise until the density reaches 1017 cm-3. Stage 6. The temperature reaches 2000 K. Hydrogen molecules dissociate at such a high temperature if h ...
... Stage 5. A shock wave forms at the outer edge of the first core. The first core accretes from the envelope through this shock. The temperature continues to rise until the density reaches 1017 cm-3. Stage 6. The temperature reaches 2000 K. Hydrogen molecules dissociate at such a high temperature if h ...
STARS
... Lets use the sun, our nearest star as an example. It is a self luminous, gaseous sphere. It has no solid surface. Its size is about 100 times the Earth and its mass is about 300,000 times that of the Earth. Its core temperature is 27 million degrees Fahrenheit and its visible surface is 10,000 degr ...
... Lets use the sun, our nearest star as an example. It is a self luminous, gaseous sphere. It has no solid surface. Its size is about 100 times the Earth and its mass is about 300,000 times that of the Earth. Its core temperature is 27 million degrees Fahrenheit and its visible surface is 10,000 degr ...
Stars: Properties and Classification
... (LSun=4 x 1026 Watts). Only about 10-9 of this actually hits the Earth. Yet, the power of sunlight that illuminates a patch of desert 100 km x 100 km is equal to the total power consumption of the US. 4 x 1026 Watts radiated over entire surface ...
... (LSun=4 x 1026 Watts). Only about 10-9 of this actually hits the Earth. Yet, the power of sunlight that illuminates a patch of desert 100 km x 100 km is equal to the total power consumption of the US. 4 x 1026 Watts radiated over entire surface ...
If you wish to a copy of this months Night Sky News
... Denebola the A3 type star at the end of Leo’s tail is about 39 light years away, and, in these times, shines with a magnitude of 2.14. However, up until about 400 years ago, Denebola was recorded as a first magnitude star. The reason for this is still something of a mystery. Were observations inacc ...
... Denebola the A3 type star at the end of Leo’s tail is about 39 light years away, and, in these times, shines with a magnitude of 2.14. However, up until about 400 years ago, Denebola was recorded as a first magnitude star. The reason for this is still something of a mystery. Were observations inacc ...
Astronomy PowerPoint - Effingham County Schools
... • Meteors or meteorites are bits of rock (like granite) and ice – from out in space that get pulled in by Earth’s gravity and fall through the atmosphere and sometimes land on earth’s surface. Many meteors are from comet pieces. • Meteors are sometimes called “shooting stars” but they are not stars. ...
... • Meteors or meteorites are bits of rock (like granite) and ice – from out in space that get pulled in by Earth’s gravity and fall through the atmosphere and sometimes land on earth’s surface. Many meteors are from comet pieces. • Meteors are sometimes called “shooting stars” but they are not stars. ...
Life Cycle of a Star
... If the star has little mass, it may end its life here, throwing off its outer layers, creating a planetary nebula out of its atmosphere, and a hot, dense "white dwarf" out of its core. White dwarfs are extremely small stars with huge densities. ...
... If the star has little mass, it may end its life here, throwing off its outer layers, creating a planetary nebula out of its atmosphere, and a hot, dense "white dwarf" out of its core. White dwarfs are extremely small stars with huge densities. ...
Celestial Objects
... the polar axis, causing the gradual apparent shift of the NCP and SCP. This causes the “pole” stars – any bright star that happens to be within a few degrees of the NCP and SCP – to be represented by different stars at various times. ...
... the polar axis, causing the gradual apparent shift of the NCP and SCP. This causes the “pole” stars – any bright star that happens to be within a few degrees of the NCP and SCP – to be represented by different stars at various times. ...
Lecture 19 - Stellar Lifecycles
... More massive stars are to the upper left, Main Sequence. less massive stars to the lower right. ...
... More massive stars are to the upper left, Main Sequence. less massive stars to the lower right. ...
STEM for TY Teachers
... interstellar medium with the heaviest elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars. ...
... interstellar medium with the heaviest elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars. ...
Solar System
... • These planets are named terrestrial because of their solid, rocky surfaces. • These planets are sometimes called the inner planets. ...
... • These planets are named terrestrial because of their solid, rocky surfaces. • These planets are sometimes called the inner planets. ...
Week 2
... • Earth’s axis points in the same direction (to Polaris) all year round, so its orientation relative to the Sun changes as Earth orbits the Sun Sun. • Summer occurs in your hemisphere when sunlight hits it more directly; winter occurs when the sunlight is less direct. • AXIS TILT is the key to the s ...
... • Earth’s axis points in the same direction (to Polaris) all year round, so its orientation relative to the Sun changes as Earth orbits the Sun Sun. • Summer occurs in your hemisphere when sunlight hits it more directly; winter occurs when the sunlight is less direct. • AXIS TILT is the key to the s ...
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... (b) According to this theory, should all planets be roughly the same age? (c) According to this theory should they all rotate in the same direction? (d) According to this theory should all the planets orbit in the same direction? On the same plane? 8) What is FUSION? At what temperature does fusion ...
... (b) According to this theory, should all planets be roughly the same age? (c) According to this theory should they all rotate in the same direction? (d) According to this theory should all the planets orbit in the same direction? On the same plane? 8) What is FUSION? At what temperature does fusion ...
Binary Star - Armagh Observatory
... interstellar medium with the heaviest elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars. ...
... interstellar medium with the heaviest elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars. ...
Branches of Earth Science Tools Used to Study Stars Constellations
... Galaxy is a huge collection of stars bound by gravity o Contain various star groups Billions of galaxies in the universe 3 types of galaxies o Spiral o Elliptical o Irregular ...
... Galaxy is a huge collection of stars bound by gravity o Contain various star groups Billions of galaxies in the universe 3 types of galaxies o Spiral o Elliptical o Irregular ...
Solar System Contents
... • Hellish conditions due to an extreme greenhouse effect • Even hotter than Mercury: 470°C, day and night © 2014 Pearson Education, Inc. ...
... • Hellish conditions due to an extreme greenhouse effect • Even hotter than Mercury: 470°C, day and night © 2014 Pearson Education, Inc. ...
Question Title
... a)Some planetoids will collide with such high energies that they do not break into pieces. Instead they meld to form one planetoid. b)Other planetoids will break into smaller pieces. In this case, the smaller pieces will likely be pulled in by the gravitational force of the largest remaining piece, ...
... a)Some planetoids will collide with such high energies that they do not break into pieces. Instead they meld to form one planetoid. b)Other planetoids will break into smaller pieces. In this case, the smaller pieces will likely be pulled in by the gravitational force of the largest remaining piece, ...
The ExOoS Mission - Extraterrestrial Octopus on Steroids
... all, the planet has to orbit its star in the habitable zone. The habitable zone is defined as the area in which water can occur in liquid stable form on planet surfaces. Therefore, this area must receive a stellar photon flux such as this flux provides enough energy for water molecules not to freeze ...
... all, the planet has to orbit its star in the habitable zone. The habitable zone is defined as the area in which water can occur in liquid stable form on planet surfaces. Therefore, this area must receive a stellar photon flux such as this flux provides enough energy for water molecules not to freeze ...
Physical Sciences Astronomy: The Formation of The Solar System
... a)Some planetoids will collide with such high energies that they do not break into pieces. Instead they meld to form one planetoid. b)Other planetoids will break into smaller pieces. In this case, the smaller pieces will likely be pulled in by the gravitational force of the largest remaining piece, ...
... a)Some planetoids will collide with such high energies that they do not break into pieces. Instead they meld to form one planetoid. b)Other planetoids will break into smaller pieces. In this case, the smaller pieces will likely be pulled in by the gravitational force of the largest remaining piece, ...
Pistol Star - University of Dayton
... Earth is only one planet orbiting one star among roughly a hundred billion stars in our Milky Way Galaxy. The Milky Way is only one galaxy of billions in the universe. Looking beyond the solar system into galactic and intergalactic space, we must stretch our minds to nearly unimaginable distances t ...
... Earth is only one planet orbiting one star among roughly a hundred billion stars in our Milky Way Galaxy. The Milky Way is only one galaxy of billions in the universe. Looking beyond the solar system into galactic and intergalactic space, we must stretch our minds to nearly unimaginable distances t ...
The Universe - Smithsonian Education
... money to establish an institution of knowledge in Washington, D.C. Smithson, who had never visited the United States, gave no clear indication of what this institution should be. John Quincy Adams, then out of the White House and elected to Congress, urged strongly that it should be an observatory, ...
... money to establish an institution of knowledge in Washington, D.C. Smithson, who had never visited the United States, gave no clear indication of what this institution should be. John Quincy Adams, then out of the White House and elected to Congress, urged strongly that it should be an observatory, ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... Have we proved the theory right? The theory of stellar evolution provides a very good explanation for the H-R diagrams of star clusters. We have tested the theory and it passed the test. But for a hypothesis to be a scientific theory it must be testable, and a test only makes sense if it is conc ...
... Have we proved the theory right? The theory of stellar evolution provides a very good explanation for the H-R diagrams of star clusters. We have tested the theory and it passed the test. But for a hypothesis to be a scientific theory it must be testable, and a test only makes sense if it is conc ...
Geo-centric astronomy from Pythagoras to Ptolemy File
... with labels “stars” or “planets.” WE have learned to distinguish between them, primarily by their curious movement. Keep watching say, Jupiter. Every night, it will be slightly eastward to the fixed stars than it was the previous night and over the course of weeks and months, it would be significant ...
... with labels “stars” or “planets.” WE have learned to distinguish between them, primarily by their curious movement. Keep watching say, Jupiter. Every night, it will be slightly eastward to the fixed stars than it was the previous night and over the course of weeks and months, it would be significant ...
Chapter 15 (Star Lives)
... D. are at different stages of their lives. 2. In making a model of a star, an astronomer does NOT have to know or assume: A. that the energy given off is produced in the interior. B. the mass of the star. C. the chemical composition of the star. D. the distance to that star. 3. For a star like our s ...
... D. are at different stages of their lives. 2. In making a model of a star, an astronomer does NOT have to know or assume: A. that the energy given off is produced in the interior. B. the mass of the star. C. the chemical composition of the star. D. the distance to that star. 3. For a star like our s ...
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.