Star and Galaxies Chapter 13
... • Core contracts, temperatures increase, outer core expands and cools and forms a late stage life cycle called a giant When temperatures reach 100 million degrees K, helium begins to fuse to form Carbon in giant’s core ...
... • Core contracts, temperatures increase, outer core expands and cools and forms a late stage life cycle called a giant When temperatures reach 100 million degrees K, helium begins to fuse to form Carbon in giant’s core ...
Wednesday, November 7, 2007
... Have been discovered mainly in star forming regions. Also sometimes found in binary star systems. ...
... Have been discovered mainly in star forming regions. Also sometimes found in binary star systems. ...
1 - Quia
... 24. A cloud of gas and dust from which stars are "born" is a A. nebula B. nova C. spectrum D. radiation 25. Gas and dust in interstellar nebulae can form - (2 points) A. stars B. comets C. meteors D. asteroids 26. Our distance from the sun is about 93 million miles, or 1 -. A. parsec B. astronomical ...
... 24. A cloud of gas and dust from which stars are "born" is a A. nebula B. nova C. spectrum D. radiation 25. Gas and dust in interstellar nebulae can form - (2 points) A. stars B. comets C. meteors D. asteroids 26. Our distance from the sun is about 93 million miles, or 1 -. A. parsec B. astronomical ...
CBA # 2 Earth and Space and Sound Energy
... ● The inner planets and outer planets are separated between an asteroid belt that is between Mars and Jupiter. (Inner planets are the first four planets and the outer planets are the last four planets.) 4. Earth is unique in that it has life on it. Reasons why Earth has life: ● Thin blanket of air c ...
... ● The inner planets and outer planets are separated between an asteroid belt that is between Mars and Jupiter. (Inner planets are the first four planets and the outer planets are the last four planets.) 4. Earth is unique in that it has life on it. Reasons why Earth has life: ● Thin blanket of air c ...
Astronomy and Cosmology - spring 2003 - final exam
... B) the orbit of the Moon is not a perfect circle. C) the plane of the Moon's orbit is at an angle to the plane of the Earth's orbit. D) the path of the Sun is inclined at an angle of 5° to the ecliptic plane. 25. Assuming clear skies everywhere, a total solar eclipse is visible A) to people anywhere ...
... B) the orbit of the Moon is not a perfect circle. C) the plane of the Moon's orbit is at an angle to the plane of the Earth's orbit. D) the path of the Sun is inclined at an angle of 5° to the ecliptic plane. 25. Assuming clear skies everywhere, a total solar eclipse is visible A) to people anywhere ...
PowerPoint
... What is the habitable zone? Define life? What is extraterrestrial life? What is the Drake equation? What is SETI? Should we not try to contact aliens? Biomolecules in space? Extremophiles? Most likely type of ET? What is the Milkyway? – Components of the Milkyway? What do they mean? Types of stars? ...
... What is the habitable zone? Define life? What is extraterrestrial life? What is the Drake equation? What is SETI? Should we not try to contact aliens? Biomolecules in space? Extremophiles? Most likely type of ET? What is the Milkyway? – Components of the Milkyway? What do they mean? Types of stars? ...
Kepler`s laws - FSU High Energy Physics
... increase of temperature and pressure in its center; when temperature and pressure high enough, “nuclear fusion” process starts; “radiation pressure” due to nuclear fusion stops gravitational collapse; ...
... increase of temperature and pressure in its center; when temperature and pressure high enough, “nuclear fusion” process starts; “radiation pressure” due to nuclear fusion stops gravitational collapse; ...
Space Science - Madison County Schools
... Earth orbits, or follows a path, around the Sun making one complete revolution every 365.24 days due to the Sun’s gravitational pull. As Earth revolves around the Sun, it rotates, or spins on it’s rotational axis, or an imaginary line on which the Earth rotates. Because Earth’s surface is curved, di ...
... Earth orbits, or follows a path, around the Sun making one complete revolution every 365.24 days due to the Sun’s gravitational pull. As Earth revolves around the Sun, it rotates, or spins on it’s rotational axis, or an imaginary line on which the Earth rotates. Because Earth’s surface is curved, di ...
THE LIFE CYCLE OF STARS
... Young stars emit jets of intense radiation that heat the surrounding matter to the point at which it glows brightly. These narrowly-focused jets can be trillions of miles long and can travel at 500,000 miles per hour. These jets may be focused by the star's magnetic field. The protostar is now a sta ...
... Young stars emit jets of intense radiation that heat the surrounding matter to the point at which it glows brightly. These narrowly-focused jets can be trillions of miles long and can travel at 500,000 miles per hour. These jets may be focused by the star's magnetic field. The protostar is now a sta ...
Unit 3, Prelab Unit 3
... way is to use the semi-major axis and the eccentricity, ε. For planetary motion, the semimajor axis is the time average distance of a planet from the Sun. The eccentricity is a number between 0 and 1 that describes the flatness of the ellipse. A circle has an eccentricity of 0. As the eccentricity in ...
... way is to use the semi-major axis and the eccentricity, ε. For planetary motion, the semimajor axis is the time average distance of a planet from the Sun. The eccentricity is a number between 0 and 1 that describes the flatness of the ellipse. A circle has an eccentricity of 0. As the eccentricity in ...
Astronomy Chapter 11 – Meteors, Comets and Asteroids A. Main
... been dated to be around 4.5 billion years old. ⇒ In some meteorites the chondrules are embedded in a black, carbon-rich, coal-like substance. These meteorites contain organic compounds including amino acids, which are the building blocks of proteins and genetic material. 2. Asteroids Asteroids are s ...
... been dated to be around 4.5 billion years old. ⇒ In some meteorites the chondrules are embedded in a black, carbon-rich, coal-like substance. These meteorites contain organic compounds including amino acids, which are the building blocks of proteins and genetic material. 2. Asteroids Asteroids are s ...
Ch. 2
... The Greeks knew that the lack of observable parallax could mean one of two things: 1. Stars are so far away that stellar parallax is too small to notice with the naked eye 2. Earth does not orbit Sun; it is the center of the universe With rare exceptions such as Aristarchus, the Greeks rejected the ...
... The Greeks knew that the lack of observable parallax could mean one of two things: 1. Stars are so far away that stellar parallax is too small to notice with the naked eye 2. Earth does not orbit Sun; it is the center of the universe With rare exceptions such as Aristarchus, the Greeks rejected the ...
Habitable Zones around Evolved Stars
... Factors determining the location of the habitable zone in evolved stars • L changes dramatically as a star evolves beyond the main sequence • ap is altered by changing M* or in extreme cases by tidal or gas drag • The albedoratio depends on planetary atmosphere, surface properties, => and the stell ...
... Factors determining the location of the habitable zone in evolved stars • L changes dramatically as a star evolves beyond the main sequence • ap is altered by changing M* or in extreme cases by tidal or gas drag • The albedoratio depends on planetary atmosphere, surface properties, => and the stell ...
Stellar Evolution - Harnett County High Schools Wiki
... Mass and composition of stars determine nearly all of the other properties of stars More massive a star is, the greater the gravity is, and the hotter and denser the star is inside Temperature inside stars determines rate of nuclear reactions, which in turn affects the energy output, or luminosi ...
... Mass and composition of stars determine nearly all of the other properties of stars More massive a star is, the greater the gravity is, and the hotter and denser the star is inside Temperature inside stars determines rate of nuclear reactions, which in turn affects the energy output, or luminosi ...
Learning About Stars
... Stars do change, but they change VERY slowly. We will probably not notice changes to the stars in our lifetime. ...
... Stars do change, but they change VERY slowly. We will probably not notice changes to the stars in our lifetime. ...
January 2006
... OBAFGKM), the arab number (5) is like a second digit to the spectral type, so K0 is very close to G, K9 is very close to M. ...
... OBAFGKM), the arab number (5) is like a second digit to the spectral type, so K0 is very close to G, K9 is very close to M. ...
STAAR Science Tutorial 35 TEK 8.8B: The Sun
... TEK 8.8B: Recognize that the Sun is a medium-sized star near the edge of a disc-shaped galaxy of stars and that the Sun is many thousands of times closer to Earth than any other star. Our Sun is a star, much like all of the other stars that are visible in the night sky. What makes our Sun different ...
... TEK 8.8B: Recognize that the Sun is a medium-sized star near the edge of a disc-shaped galaxy of stars and that the Sun is many thousands of times closer to Earth than any other star. Our Sun is a star, much like all of the other stars that are visible in the night sky. What makes our Sun different ...
here - Just A Theory
... Obviously high speeds are desirable because you want to get somewhere as fast as possible, however, that does not mean high speeds are necessary. It has been suggested that galactic colonisation by robotic probes could take 5-50 million years, not long on a galactic timescale.[13] These so called Br ...
... Obviously high speeds are desirable because you want to get somewhere as fast as possible, however, that does not mean high speeds are necessary. It has been suggested that galactic colonisation by robotic probes could take 5-50 million years, not long on a galactic timescale.[13] These so called Br ...
17Nov_2014
... • a. The star has many times more mass than the Sun. • b. The helium-rich core expanded, pushing the outer layers of the star outward. • c. Red giants are rapid rotators, and the centrifugal forces pushes the surface of the star outwards. • d. The hydrogen-burning shell is heating the envelope and m ...
... • a. The star has many times more mass than the Sun. • b. The helium-rich core expanded, pushing the outer layers of the star outward. • c. Red giants are rapid rotators, and the centrifugal forces pushes the surface of the star outwards. • d. The hydrogen-burning shell is heating the envelope and m ...
CH 12
... Thus C does not contain m. The ratio 3 does not depend R on the planet mass m. Instead it depends on the sun mass M and is the same for all the planets of the solar system. ...
... Thus C does not contain m. The ratio 3 does not depend R on the planet mass m. Instead it depends on the sun mass M and is the same for all the planets of the solar system. ...
The Ceres Connection - MIT Lincoln Laboratory
... The length of the trail depends on the apparent motion of the object and the exposure time. This photographic method was quite successful in discovering new objects, many of which were difficult to observe visually, and the rate of discovery rose. By the 1930s, few serious astronomers were observing ...
... The length of the trail depends on the apparent motion of the object and the exposure time. This photographic method was quite successful in discovering new objects, many of which were difficult to observe visually, and the rate of discovery rose. By the 1930s, few serious astronomers were observing ...
Harmony of the Worlds
... • People who engage in circular reasoning almost never scrap or modify their initial hypothesis • The whole point of circular reasoning is to ...
... • People who engage in circular reasoning almost never scrap or modify their initial hypothesis • The whole point of circular reasoning is to ...
Star Types - University of Massachusetts Amherst
... Suppose two stars are at equal distance and have the same radius, but one has a temperature that is twice as great as the other. The apparent brightness of the hotter star is ____ as the other. ...
... Suppose two stars are at equal distance and have the same radius, but one has a temperature that is twice as great as the other. The apparent brightness of the hotter star is ____ as the other. ...
Sirius Astronomer - Orange County Astronomers
... a bright star that appears to be the least massive exoplanet directly observed. Although nearly 1000 exoplanets have been discovered, only about a dozen have been directly imaged. The mass was estimated from its brightness, and appears to be 4-5 times that of Jupiter. The object was imaged in infrar ...
... a bright star that appears to be the least massive exoplanet directly observed. Although nearly 1000 exoplanets have been discovered, only about a dozen have been directly imaged. The mass was estimated from its brightness, and appears to be 4-5 times that of Jupiter. The object was imaged in infrar ...
PPT
... How massive are stars? • The overall range of stellar masses runs from 0.08 times the mass of the Sun to about 150 times the mass of the Sun. • Masses are only known for stars that form binary systems, but about half of all stars are in fact in binary systems! – 0.08 MSun is approximately 80 MJupit ...
... How massive are stars? • The overall range of stellar masses runs from 0.08 times the mass of the Sun to about 150 times the mass of the Sun. • Masses are only known for stars that form binary systems, but about half of all stars are in fact in binary systems! – 0.08 MSun is approximately 80 MJupit ...
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.