The_Birth_of_a_Star
... • If the star is very large, it burns through the hydrogen quickly; helium fuses to make carbon, and as the helium is exhausted the collapse of the core generates enough energy to fuse the carbon forming iron. • Eventually the star collapses, as the electrons are trapped inside the core, forming ne ...
... • If the star is very large, it burns through the hydrogen quickly; helium fuses to make carbon, and as the helium is exhausted the collapse of the core generates enough energy to fuse the carbon forming iron. • Eventually the star collapses, as the electrons are trapped inside the core, forming ne ...
WK8revised
... “With equal passion I have sought knowledge. I have wished to understand the hearts of [people]. I have wished to know why the stars shine.” -Bertrand Russell ...
... “With equal passion I have sought knowledge. I have wished to understand the hearts of [people]. I have wished to know why the stars shine.” -Bertrand Russell ...
Solar System Marius A
... total mass of the Solar System. About three quartersof the Suns's mass consists of hydrogen;the rest is mostly helium ,with much smaller quantities of heavier elements, including oxygen , carbon , neon and iron. ...
... total mass of the Solar System. About three quartersof the Suns's mass consists of hydrogen;the rest is mostly helium ,with much smaller quantities of heavier elements, including oxygen , carbon , neon and iron. ...
What do the stars tell us?
... If the expansion is accelerating, then it was slower, and the Universe is older comfortably older than the oldest star. ...
... If the expansion is accelerating, then it was slower, and the Universe is older comfortably older than the oldest star. ...
Lab 21.1 Classifying Stars
... Groups of two (maximum), but each person does the lab. Note the position of the Sun: temperature = 5,000C Plot the 36 closest stars on the graph paper and mark each star’s location with a small “x”. Plot the 20 brightest stars on the graph paper and mark each star’s location with a small “o”. Using ...
... Groups of two (maximum), but each person does the lab. Note the position of the Sun: temperature = 5,000C Plot the 36 closest stars on the graph paper and mark each star’s location with a small “x”. Plot the 20 brightest stars on the graph paper and mark each star’s location with a small “o”. Using ...
PPT - El Camino College
... – Collisions can destroy small planetesimals. – What’s left at the end? – What’s the temperature like near the Sun? • Gases won’t stay on the planets ...
... – Collisions can destroy small planetesimals. – What’s left at the end? – What’s the temperature like near the Sun? • Gases won’t stay on the planets ...
Life Cycle of Stars
... •When atomic nuclei form a nucleus •Hydrogen fuses into helium •All stars (low and high mass) go through this •How long a star lives depends on its mass •Small stars use their fuel slow = longer lives ...
... •When atomic nuclei form a nucleus •Hydrogen fuses into helium •All stars (low and high mass) go through this •How long a star lives depends on its mass •Small stars use their fuel slow = longer lives ...
The History of Astronomy
... • He even got the relative distances from the sun correct (see chart on page 49). • Moon orbits Earth To avoid religious persecution he published his work “de revolutionibus orbium coelestium” posthumusly. ...
... • He even got the relative distances from the sun correct (see chart on page 49). • Moon orbits Earth To avoid religious persecution he published his work “de revolutionibus orbium coelestium” posthumusly. ...
A stars
... Around Sirius (Spectral type A1: 26 times more luminous than the Sun), an Earth-sized planet would have to orbit at about the distance of Jupiter from the star. Around Epsilon Indi (Spectral type K5: about one-tenth the Sun's luminosity), an Earth-sized planet would have to orbit at about the distan ...
... Around Sirius (Spectral type A1: 26 times more luminous than the Sun), an Earth-sized planet would have to orbit at about the distance of Jupiter from the star. Around Epsilon Indi (Spectral type K5: about one-tenth the Sun's luminosity), an Earth-sized planet would have to orbit at about the distan ...
White Dwarf
... • The end of the sun will be a small, hot star that will last until the remaining material burns up. ...
... • The end of the sun will be a small, hot star that will last until the remaining material burns up. ...
1 The Synodic and Orbit Periods of the Planets
... Objective: to see the development of a paradigm shift in our understanding of the motions of the planets in the solar system Equipment: Voyager planetarium software, Excel Background: For at least three thousand years people have watched the planets move against the background formed by the constell ...
... Objective: to see the development of a paradigm shift in our understanding of the motions of the planets in the solar system Equipment: Voyager planetarium software, Excel Background: For at least three thousand years people have watched the planets move against the background formed by the constell ...
The Synodic and Orbit Periods of the Planets
... Objective: to see the development of a paradigm shift in our understanding of the motions of the planets in the solar system Equipment: Voyager planetarium software, Excel Background: For at least three thousand years people have watched the planets move against the background formed by the constell ...
... Objective: to see the development of a paradigm shift in our understanding of the motions of the planets in the solar system Equipment: Voyager planetarium software, Excel Background: For at least three thousand years people have watched the planets move against the background formed by the constell ...
Quiz Maker - Geneva 304
... 82. What are the atmospheres of Venus and Mars mainly composed of? 83. Mercury, _____, asteroids, and almost all of the moons of the outer planets have very thin or no atmospheres because of their small size and low gravity, which allows almost all of the gases above the surface to escape. 84. How d ...
... 82. What are the atmospheres of Venus and Mars mainly composed of? 83. Mercury, _____, asteroids, and almost all of the moons of the outer planets have very thin or no atmospheres because of their small size and low gravity, which allows almost all of the gases above the surface to escape. 84. How d ...
Solar System`s Age - Empyrean Quest Publishers
... substance is a solid or a gas. – Above the condensation temperature, gas state – Below the condensation temperature, solid sate • Hydrogen and Helium: always in gas state, because concentration temperatures close to absolute zero • Substance such as water (H2O), methane (CH4) and ammonia (NH3) have ...
... substance is a solid or a gas. – Above the condensation temperature, gas state – Below the condensation temperature, solid sate • Hydrogen and Helium: always in gas state, because concentration temperatures close to absolute zero • Substance such as water (H2O), methane (CH4) and ammonia (NH3) have ...
Protostars and planets
... The astronomical community has yet to settle upon a crisp definition of planet. The distinction between planets and stars seemed too obvious to require precise formulation when the only planets known were those in the Solar System: the most massive of them is only MJupiter ≈ 10−3 M⊙ , and there are ...
... The astronomical community has yet to settle upon a crisp definition of planet. The distinction between planets and stars seemed too obvious to require precise formulation when the only planets known were those in the Solar System: the most massive of them is only MJupiter ≈ 10−3 M⊙ , and there are ...
WK8
... “With equal passion I have sought knowledge. I have wished to understand the hearts of [people]. I have wished to know why the stars shine.” -Bertrand Russell ...
... “With equal passion I have sought knowledge. I have wished to understand the hearts of [people]. I have wished to know why the stars shine.” -Bertrand Russell ...
Name
... A comet is a ball of ice, rock, and frozen gases that orbits the sun. A comet may pass close by the sun or go as far as the edges of the solar system. Each time a comet approaches the sun it changes. As some of the ice melts a cloud of dust from the comet is released, that forms a tail always pointi ...
... A comet is a ball of ice, rock, and frozen gases that orbits the sun. A comet may pass close by the sun or go as far as the edges of the solar system. Each time a comet approaches the sun it changes. As some of the ice melts a cloud of dust from the comet is released, that forms a tail always pointi ...
The Universe, Solar System, and Planets I
... origin found in Antarctica in 1984, announced that fossilized microorganisms from Mars might be present in it. Valleys and Canyons on Mars suggest that the planet once had large amounts of surface water. In winter, nighttime temperatures on Mars can drop as low as -191°F. ...
... origin found in Antarctica in 1984, announced that fossilized microorganisms from Mars might be present in it. Valleys and Canyons on Mars suggest that the planet once had large amounts of surface water. In winter, nighttime temperatures on Mars can drop as low as -191°F. ...
The surface temperature of a planet
... Note that these are average surface temperatures: latitude, geography, seasons, local albedo, local cloud cover etc. cause variations in the earth’s surface temperature of ±30 –40 K (compare Northern Canada with Arabia). Another minor factor is heat released from inside a planet. The larger terrestr ...
... Note that these are average surface temperatures: latitude, geography, seasons, local albedo, local cloud cover etc. cause variations in the earth’s surface temperature of ±30 –40 K (compare Northern Canada with Arabia). Another minor factor is heat released from inside a planet. The larger terrestr ...
Test 2 review session
... X rays and gamma rays will not reflect off mirrors as other wavelengths do; need new techniques. X rays will reflect at a very shallow angle, and can therefore be focused. ...
... X rays and gamma rays will not reflect off mirrors as other wavelengths do; need new techniques. X rays will reflect at a very shallow angle, and can therefore be focused. ...
Review 1 - AST 1002 - FSU Physics Department
... How long would a star of 9 solar masses and 2700 solar luminosities remain on the main sequence? ...
... How long would a star of 9 solar masses and 2700 solar luminosities remain on the main sequence? ...
Stars - BrainBytes
... Majority of stars (about 90%) fall in this category Runs from upper left (high luminosity, high surface temperature ) to lower right (low luminosity, low surface temperature) Life span: 1 million – 1 billion yrs Actively fuse hydrogen and helium Example: our Sun ...
... Majority of stars (about 90%) fall in this category Runs from upper left (high luminosity, high surface temperature ) to lower right (low luminosity, low surface temperature) Life span: 1 million – 1 billion yrs Actively fuse hydrogen and helium Example: our Sun ...
Mountain Skies - Pisgah Astronomical Research Institute
... June 6 and Mercury follows suit this coming Wednesday. Since Mercury moves much faster, it will catch up with Venus and the two will be less than a degree apart on July 16. The dedicated observer may see them as early as next week It won’t take a dedicated observe to spot the other three planets. Ju ...
... June 6 and Mercury follows suit this coming Wednesday. Since Mercury moves much faster, it will catch up with Venus and the two will be less than a degree apart on July 16. The dedicated observer may see them as early as next week It won’t take a dedicated observe to spot the other three planets. Ju ...
1. Evolution of the Solar System— Nebular hypothesis, p 10 a
... b. Gravitational collapse contracted it into rotating disc c. Heat of conversion of gravitational to thermal energy fired Sun into star in center of nebular cloud d. Cooling allowed condensation of rocky particles in inner solar system, that collided to become planets—accretion i. Their accretion cr ...
... b. Gravitational collapse contracted it into rotating disc c. Heat of conversion of gravitational to thermal energy fired Sun into star in center of nebular cloud d. Cooling allowed condensation of rocky particles in inner solar system, that collided to become planets—accretion i. Their accretion cr ...
Mountain-Skies-2016-0718
... telescope and you will note a colorful double star.) To the sides of the swan we can trace out his wings. Cygnus was the close friend of Phaeton who was the son of Helios the god of the sun. When Phaeton lost control of his father’s horses and ...
... telescope and you will note a colorful double star.) To the sides of the swan we can trace out his wings. Cygnus was the close friend of Phaeton who was the son of Helios the god of the sun. When Phaeton lost control of his father’s horses and ...
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.