Lecture 9
... • Each difference of five magnitudes represents a factor of 100 in brightness • A few objects have magnitudes less than 1 • Absolute magnitude describes stellar luminosities – Its what the stars apparent magnitude would be if it were 10 parsecs away ...
... • Each difference of five magnitudes represents a factor of 100 in brightness • A few objects have magnitudes less than 1 • Absolute magnitude describes stellar luminosities – Its what the stars apparent magnitude would be if it were 10 parsecs away ...
Conditions for Life
... Water may be the most important component necessary for life to exist on Earth. Water doesn’t burn the skin like some acidic liquids. It is drinkable and allows life sustaining molecules to be carried through the body. Some moons in the solar system may contain frozen water. Europa, one of Jupiter’s ...
... Water may be the most important component necessary for life to exist on Earth. Water doesn’t burn the skin like some acidic liquids. It is drinkable and allows life sustaining molecules to be carried through the body. Some moons in the solar system may contain frozen water. Europa, one of Jupiter’s ...
chart_set_2 - Physics and Astronomy
... Kepler's First Law The orbits of the planets are elliptical (not circular) with the Sun at one focus of the ellipse. ...
... Kepler's First Law The orbits of the planets are elliptical (not circular) with the Sun at one focus of the ellipse. ...
Lecture 4 - Orbits of the planets
... – from cosmic background radiation 1.41010 light years (1965) ...
... – from cosmic background radiation 1.41010 light years (1965) ...
Explorations of the Universe
... Number of Stars in the Galaxy (400 billion) x Fraction of Stars with Planets (1/4?) x Number of suitable planets per star (2?) x Fraction of planets where life appears (1/2??) x Fraction of planets with intelligence (???) x Fraction of planets with technology (???) x Fraction of planet’s life with t ...
... Number of Stars in the Galaxy (400 billion) x Fraction of Stars with Planets (1/4?) x Number of suitable planets per star (2?) x Fraction of planets where life appears (1/2??) x Fraction of planets with intelligence (???) x Fraction of planets with technology (???) x Fraction of planet’s life with t ...
Retrograde Motion pre
... will come, and as bright in the night sky as it will appear, until the time of the next opposition approaches. When a planet is in opposition it is visible throughout the night because it rises at sunset. From Kepler’s Third Law we know that a superior planet moves more slowly around its orbit than ...
... will come, and as bright in the night sky as it will appear, until the time of the next opposition approaches. When a planet is in opposition it is visible throughout the night because it rises at sunset. From Kepler’s Third Law we know that a superior planet moves more slowly around its orbit than ...
Lecture 2 - University of Chicago, Astronomy
... in the telescope, but stars did not; observed all four phases of the Venus (gibbous phases could not be explained by the Ptolemaic model); discovered four largest satellites of Jupiter; they are still called Galilean moons; this was another blow to the dying Ptolemaic system. Galileo resolved the Mi ...
... in the telescope, but stars did not; observed all four phases of the Venus (gibbous phases could not be explained by the Ptolemaic model); discovered four largest satellites of Jupiter; they are still called Galilean moons; this was another blow to the dying Ptolemaic system. Galileo resolved the Mi ...
The Sun PPT
... A star is a huge sphere of very hot, glowing gas. Stars produce their own light and energy by a process called nuclear fusion. Fusion happens when lighter elements are forced to become heavier elements. When this happens, a tremendous amount of energy is created causing the star to heat up and shine ...
... A star is a huge sphere of very hot, glowing gas. Stars produce their own light and energy by a process called nuclear fusion. Fusion happens when lighter elements are forced to become heavier elements. When this happens, a tremendous amount of energy is created causing the star to heat up and shine ...
Volume 20 Number 10 September 2012
... In 2010, observers reported the most massive stars ever seen, - it exceeded what many astronomers thought was a maximum about 150 times the mass of the Sun. The heavyweight champs resided 160,000 light-years from Earth in Radcliffe 136, a dense star cluster within the Large Magellanic Cloud, the bri ...
... In 2010, observers reported the most massive stars ever seen, - it exceeded what many astronomers thought was a maximum about 150 times the mass of the Sun. The heavyweight champs resided 160,000 light-years from Earth in Radcliffe 136, a dense star cluster within the Large Magellanic Cloud, the bri ...
Lecture 43
... The Kuiper Belt, which lies between 30 to 50 AU from the Sun, is a great ring of debris, similar to the asteroid belt but of much lower density material – presumably dominated by hydrocarbons and ices of H2O, CH4, and NH3 with lesser amounts of silicates. This region is thought to be the place of or ...
... The Kuiper Belt, which lies between 30 to 50 AU from the Sun, is a great ring of debris, similar to the asteroid belt but of much lower density material – presumably dominated by hydrocarbons and ices of H2O, CH4, and NH3 with lesser amounts of silicates. This region is thought to be the place of or ...
Which of the following statements is TRUE
... D. If both stars were at the same distance from us, the Sun would appear 81 times fainter than star X E. ...
... D. If both stars were at the same distance from us, the Sun would appear 81 times fainter than star X E. ...
Yes, we are all star dust. Even Gary!
... With increasing temperatures in the core of the star, heavier elements form: ...
... With increasing temperatures in the core of the star, heavier elements form: ...
Astronomy 10: Introduction to General Astronomy Instructor: Tony
... The Kuiper belt is a group of thousands of objects, orbiting slightly exterior to Neptune. They are thought to be left over from our Solar System’s formation. Pluto is a member of the Kuiper belt (although Pluto was discovered earlier because of it’s large size and high albedo, which makes it easier ...
... The Kuiper belt is a group of thousands of objects, orbiting slightly exterior to Neptune. They are thought to be left over from our Solar System’s formation. Pluto is a member of the Kuiper belt (although Pluto was discovered earlier because of it’s large size and high albedo, which makes it easier ...
Quantum Well Electron Gain Structures and Infrared
... • If planet is close in, orbit will be unstable and chaotic • Moving in/out of HZ is probably hard on life development • If planet is far away (orbiting BOTH stars), orbit is stable, but typically outside the HZ (!) ...
... • If planet is close in, orbit will be unstable and chaotic • Moving in/out of HZ is probably hard on life development • If planet is far away (orbiting BOTH stars), orbit is stable, but typically outside the HZ (!) ...
astronomy review sheet2
... 15. About how many revolutions does the moon make in one month? 16. Why don’t we have an eclipse every time the moon orbits Earth? Lesson #4: Orbits 17. What shape are the orbits of most celestial objects? 18. As an object gets closer to what it is orbiting (in our case the Sun), what happens to the ...
... 15. About how many revolutions does the moon make in one month? 16. Why don’t we have an eclipse every time the moon orbits Earth? Lesson #4: Orbits 17. What shape are the orbits of most celestial objects? 18. As an object gets closer to what it is orbiting (in our case the Sun), what happens to the ...
Stars and Galaxies
... inner section; some have barred spirals with stars and gas in a central bar Elliptical galaxies—large, three-dimensional ellipses; most common shape Irregular galaxies—smaller, less common galaxies with various different shapes ...
... inner section; some have barred spirals with stars and gas in a central bar Elliptical galaxies—large, three-dimensional ellipses; most common shape Irregular galaxies—smaller, less common galaxies with various different shapes ...
Unit 2 - WordPress.com
... A star is a bright ball of very hot gases. The Sun is the nearest star to Earth. The next nearest star to Earth is Proxima Centaure. It is 4.2 light years away. This means it takes 4.2 light years for the light from this start to reach Earth. It would take 75,000 years to visit this star in a spaces ...
... A star is a bright ball of very hot gases. The Sun is the nearest star to Earth. The next nearest star to Earth is Proxima Centaure. It is 4.2 light years away. This means it takes 4.2 light years for the light from this start to reach Earth. It would take 75,000 years to visit this star in a spaces ...
Hertzsprung-Russell Diagram Astronomy Project Purpose: To
... comparing it to other objects in the solar system. Example: The radius of Betelgeuse is 380,000,000 km, which could fit the entire orbit of the inner planets inside it. Something to put it into perspective. 4.) Determine how many times more or less massive your star is compared to the Sun. You may i ...
... comparing it to other objects in the solar system. Example: The radius of Betelgeuse is 380,000,000 km, which could fit the entire orbit of the inner planets inside it. Something to put it into perspective. 4.) Determine how many times more or less massive your star is compared to the Sun. You may i ...
Slayt 1
... etc are formed during the SN explosion. • Now the interstellar medium is richer with heavy elements. • …but how did these elements in the ...
... etc are formed during the SN explosion. • Now the interstellar medium is richer with heavy elements. • …but how did these elements in the ...
Life cycle of the Stars - Christos N. Hadjichristidis
... The Beginning of the End: Red Giants After Hydrogen is exhausted in core ... Energy released from nuclear fusion counter-acts inward force of gravity. ...
... The Beginning of the End: Red Giants After Hydrogen is exhausted in core ... Energy released from nuclear fusion counter-acts inward force of gravity. ...
PH109 Exploring the Universe
... (d), what happens to the gravitation force between them a) stays the same, b) increases by a factor of four c) decreases by a factor of four, d) increases by a factor of two 27. A police officer tells me that I my blue shift velocity exceeded posted limits. What does he mean? a) you were speeding aw ...
... (d), what happens to the gravitation force between them a) stays the same, b) increases by a factor of four c) decreases by a factor of four, d) increases by a factor of two 27. A police officer tells me that I my blue shift velocity exceeded posted limits. What does he mean? a) you were speeding aw ...
Planet Profile for Uranus
... -It has as many as 39 or more moons, however only sixteen of them have been named and agreed upon. -It has a faint ring. -Jupiter’s power of gravity is so strong it grabs on to objects that come too close. -Atmospheric composition is 90% Hydrogen and 10% Helium. - The Red Spot is a hurricane. It is ...
... -It has as many as 39 or more moons, however only sixteen of them have been named and agreed upon. -It has a faint ring. -Jupiter’s power of gravity is so strong it grabs on to objects that come too close. -Atmospheric composition is 90% Hydrogen and 10% Helium. - The Red Spot is a hurricane. It is ...
Star Formation 1/18/2015
... OB Stars are the most influential Characteristics? _______! Type of light? _______ So? _______ light ionizes Hydrogen Produces large cloud of hot glowing gas - _____________ ...
... OB Stars are the most influential Characteristics? _______! Type of light? _______ So? _______ light ionizes Hydrogen Produces large cloud of hot glowing gas - _____________ ...
Document
... Explaining the Characteristics of the Solar System 1. The orbits of the planets lie in the same plane because the rotating solar nebula collapsed into a disk, and the planets formed in that disk. Objects are co-eval (4.) 2. The division into small inner and giant outer planets rests upon the amoun ...
... Explaining the Characteristics of the Solar System 1. The orbits of the planets lie in the same plane because the rotating solar nebula collapsed into a disk, and the planets formed in that disk. Objects are co-eval (4.) 2. The division into small inner and giant outer planets rests upon the amoun ...
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.