High Mass Stars
... – From H-R diagram its luminosity is 100000 times greater than the Sun’s. – It therefore burns fuel (uses it’s mass) 100000 times faster than the Sun. – It has 25 times the mass of the Sun so its lifetime will be 25/100000 = 0.00025 times than the Sun’s lifetime = 2.5 million years. ...
... – From H-R diagram its luminosity is 100000 times greater than the Sun’s. – It therefore burns fuel (uses it’s mass) 100000 times faster than the Sun. – It has 25 times the mass of the Sun so its lifetime will be 25/100000 = 0.00025 times than the Sun’s lifetime = 2.5 million years. ...
Beyond the Solar System Homework for Geology 8
... 20. A collection or cluster of stars and solar systems such as the Milky Way or Andromeda. 21. This type of nebula is a cloud of glowing gas excited by ultraviolet radiation from hot stars. ...
... 20. A collection or cluster of stars and solar systems such as the Milky Way or Andromeda. 21. This type of nebula is a cloud of glowing gas excited by ultraviolet radiation from hot stars. ...
Astronomy 12 - hrsbstaff.ednet.ns.ca
... G. Mass-Luminosity Relation. A nearby star happens to be twice as massive as the Sun, and also twice as large. (a) What is its main sequence lifetime compared to that of the Sun? (b) What is its surface temperature compared to the Sun? Use the Mass-Luminosity relation. (c) What is the star's spectra ...
... G. Mass-Luminosity Relation. A nearby star happens to be twice as massive as the Sun, and also twice as large. (a) What is its main sequence lifetime compared to that of the Sun? (b) What is its surface temperature compared to the Sun? Use the Mass-Luminosity relation. (c) What is the star's spectra ...
Stellar Evolution – Life of a Star
... Stellar Evolution – Life of a Star • The fundamental property shared by all Main Sequence stars is THERMAL EQUILIBRIUM. The liberation of energy from the interior of the star is balanced by the energy released at the surface of the star. The energy is produced by hydrogen burning in the core of sta ...
... Stellar Evolution – Life of a Star • The fundamental property shared by all Main Sequence stars is THERMAL EQUILIBRIUM. The liberation of energy from the interior of the star is balanced by the energy released at the surface of the star. The energy is produced by hydrogen burning in the core of sta ...
Earth Science CA Standard Study Guide
... the planets where forming. There are two types of planets the inner(terrestrial) and the outer (gas planets) The terrestrial planets are rocky and have a solid surface The terrestrial planets from the Sun are Mercury, Venus, Earth, and Mars The gas planets also known as the gas giants are very large ...
... the planets where forming. There are two types of planets the inner(terrestrial) and the outer (gas planets) The terrestrial planets are rocky and have a solid surface The terrestrial planets from the Sun are Mercury, Venus, Earth, and Mars The gas planets also known as the gas giants are very large ...
Are planetary systems flat?
... – it is astonishing to see all the planets move around the Sun from west to east, and almost in the same plane; all the satellites move around their planets in the same direction and nearly in the same plane as the planets; finally, the Sun, the planets, and all the satellites that have been observe ...
... – it is astonishing to see all the planets move around the Sun from west to east, and almost in the same plane; all the satellites move around their planets in the same direction and nearly in the same plane as the planets; finally, the Sun, the planets, and all the satellites that have been observe ...
OBAFGKM(LT) extra credit due today. Mid
... Last Time: Stars “Luminosity class” is added to the spectral type, telling you if it’s main-sequence (a “dwarf”, V), giant (III), or super-giant star (I). The sun is a G2 V. Stars occur in smaller “open” and giant “globular” clusters, with hundreds to millions of stars. Stars in clusters born at th ...
... Last Time: Stars “Luminosity class” is added to the spectral type, telling you if it’s main-sequence (a “dwarf”, V), giant (III), or super-giant star (I). The sun is a G2 V. Stars occur in smaller “open” and giant “globular” clusters, with hundreds to millions of stars. Stars in clusters born at th ...
Hot-plate model of stars Test 2 & grades • Public viewing sessions
... • 3 clicker points for 10 best answers that can be repeated in class. • Enter in Angel before ...
... • 3 clicker points for 10 best answers that can be repeated in class. • Enter in Angel before ...
THE BIG BANG THEORY
... HELIUM IN THE UNIVERSE • By observing ultraviolet light, astronomers found helium in the early Universe. • Helium forms when deuterium fuses with another deuterium (H-2 and H-2 forming Helium) for this to happen, it must be super HOT! (around 10 billion Kelvin) ...
... HELIUM IN THE UNIVERSE • By observing ultraviolet light, astronomers found helium in the early Universe. • Helium forms when deuterium fuses with another deuterium (H-2 and H-2 forming Helium) for this to happen, it must be super HOT! (around 10 billion Kelvin) ...
s%nffi - mrtavares
... the H-R diagram, the main-sequence stars appear in decreasing order, from hotter, rnore massive biue stars to cooler, less massive red stars. Above and to the right of the main sequence in the H-R diagram lies a group of very bright stars called red giants. The size of these giants can be estimated ...
... the H-R diagram, the main-sequence stars appear in decreasing order, from hotter, rnore massive biue stars to cooler, less massive red stars. Above and to the right of the main sequence in the H-R diagram lies a group of very bright stars called red giants. The size of these giants can be estimated ...
Einstein
... • Emission (mostly radio) is concentrated at the magnetic poles and focused into a beam. • Whether we see a pulsar depends on the geometry. – if the polar beam sweeps by Earth’s direction once each rotation, the neutron star appears to be a pulsar – if the polar beam is always pointing toward or alw ...
... • Emission (mostly radio) is concentrated at the magnetic poles and focused into a beam. • Whether we see a pulsar depends on the geometry. – if the polar beam sweeps by Earth’s direction once each rotation, the neutron star appears to be a pulsar – if the polar beam is always pointing toward or alw ...
Outline - Picnic Point High School
... The Universe began with a singularity in space-time. After the initial explosion, the Universe started to expand, cool and condense, forming matter. As part of this ongoing process the Sun and the Solar System were formed over 4x109 years ago from a gas cloud which resulted from a supernova explosio ...
... The Universe began with a singularity in space-time. After the initial explosion, the Universe started to expand, cool and condense, forming matter. As part of this ongoing process the Sun and the Solar System were formed over 4x109 years ago from a gas cloud which resulted from a supernova explosio ...
Mars
... What is the size of the planet? What is the length of days and years? Find 3 interesting facts about Jupiter. Find at least 1 similarity and one 1 difference between Jupiter and Earth. http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/j upiter.html http://www.enchantedlearning.com/su ...
... What is the size of the planet? What is the length of days and years? Find 3 interesting facts about Jupiter. Find at least 1 similarity and one 1 difference between Jupiter and Earth. http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/j upiter.html http://www.enchantedlearning.com/su ...
From planetesimals to planetary systems: a hardles race
... Saturn-Jupiter size planets: Type II, III migration Numerical simulations: resolution close to the planet (CPD handling) and at resonances ...
... Saturn-Jupiter size planets: Type II, III migration Numerical simulations: resolution close to the planet (CPD handling) and at resonances ...
What is a Solar System?
... decayed into less exotic materials or it went to far parts of the Universe which we may never see. The material which we see at this point of time is not as hot as the exotic matter, but still hotter than anywhere today. Expansion continues, and eventually the temperature falls enough for the quarks ...
... decayed into less exotic materials or it went to far parts of the Universe which we may never see. The material which we see at this point of time is not as hot as the exotic matter, but still hotter than anywhere today. Expansion continues, and eventually the temperature falls enough for the quarks ...
K-3 Planetarium Lesson: Our Skies
... it. Then say you are going to look at some stars. In the summer time there is 1 star visible nearly all the time. Can anyone think of what it is? The Sun! Ask the kids to find/point to the sun. We often don’t see other stars or planets in the summertime because the sun brightens our sky. The stars a ...
... it. Then say you are going to look at some stars. In the summer time there is 1 star visible nearly all the time. Can anyone think of what it is? The Sun! Ask the kids to find/point to the sun. We often don’t see other stars or planets in the summertime because the sun brightens our sky. The stars a ...
A Question of Planets - Vanderbilt University
... and had an extremely good time before giving the bike away and heading home. When he returned, Weintraub landed a job teaching astronomy at Santa Monica Community College and discovered that he enjoyed teaching. However, he also decided that he only wanted to do this kind of teaching if he combined ...
... and had an extremely good time before giving the bike away and heading home. When he returned, Weintraub landed a job teaching astronomy at Santa Monica Community College and discovered that he enjoyed teaching. However, he also decided that he only wanted to do this kind of teaching if he combined ...
Stars are made of very hot gas. This gas is mostly hydrogen and
... to heat up. The heat works its way from the inside of the star to the surface, and then radiates into space. So what we see of stars is the energy released from the nuclear reactions inside their cores and then radiated from the surface. There are many different kinds of stars. They come in many siz ...
... to heat up. The heat works its way from the inside of the star to the surface, and then radiates into space. So what we see of stars is the energy released from the nuclear reactions inside their cores and then radiated from the surface. There are many different kinds of stars. They come in many siz ...
Spectroscopy Lecture 10
... – Upper limit to mass supported by electron degeneracy pressure due to limit of velocity of light (1.4 solar masses) Zwicky (1930’s) Degenerate Neutron Stars Schatzman (1958) – chemical diffusion in strong gravity (plus radiative levitation, winds and mass loss, convective mixing, accretion) Gre ...
... – Upper limit to mass supported by electron degeneracy pressure due to limit of velocity of light (1.4 solar masses) Zwicky (1930’s) Degenerate Neutron Stars Schatzman (1958) – chemical diffusion in strong gravity (plus radiative levitation, winds and mass loss, convective mixing, accretion) Gre ...
ASTR 1050: Survey of Astronomy
... a. By measuring the wavelength with the most intense light and applying Wien's law b. By measuring the strengths of the absorption lines from different elements c. By measuring the distance and magnitude and applying the inverse square law of light d. a. and b. e. a and c. f. b and c. 33. A star’s a ...
... a. By measuring the wavelength with the most intense light and applying Wien's law b. By measuring the strengths of the absorption lines from different elements c. By measuring the distance and magnitude and applying the inverse square law of light d. a. and b. e. a and c. f. b and c. 33. A star’s a ...
1 Marsbugs: The Electronic Astrobiology Newsletter, Volume 12
... In the new CU-Boulder scenario, it is a hydrogen and CO2-dominated atmosphere that leads to the production of organic molecules, not the methane and ammonia atmosphere used in Miller's experiment, Toon said. Tian and other team members said the research effort will continue. The duration of the hydr ...
... In the new CU-Boulder scenario, it is a hydrogen and CO2-dominated atmosphere that leads to the production of organic molecules, not the methane and ammonia atmosphere used in Miller's experiment, Toon said. Tian and other team members said the research effort will continue. The duration of the hydr ...
The Solar System
... minor planets and many other exciting objects, planets nasa solar system exploration - we are nasa s planetary science division our hardworking robots explore the planets and more on the wild frontiers of our solar system, our solar system national geographic - learn more about the celestial bodies ...
... minor planets and many other exciting objects, planets nasa solar system exploration - we are nasa s planetary science division our hardworking robots explore the planets and more on the wild frontiers of our solar system, our solar system national geographic - learn more about the celestial bodies ...
East Valley Astronomy Club
... New models of the “minimum mass solar nebula” show the nebula really was very dense, but this structure is only understood if the disk was photoevaporating because of a nearby massive star. Meteorites show the Solar System contained live 60Fe, almost certainly ejected by a nearby massive star that w ...
... New models of the “minimum mass solar nebula” show the nebula really was very dense, but this structure is only understood if the disk was photoevaporating because of a nearby massive star. Meteorites show the Solar System contained live 60Fe, almost certainly ejected by a nearby massive star that w ...
Circumstellar Disks: the Formation and Evolution of
... Fine dust mass 1020 kg; gas mass 1022 kg, if gas is fluorescent If gas is dense then it must be transient High spectral resolution observations are needed to confirm SiO, measure gas properties and infer excitation mechanism ...
... Fine dust mass 1020 kg; gas mass 1022 kg, if gas is fluorescent If gas is dense then it must be transient High spectral resolution observations are needed to confirm SiO, measure gas properties and infer excitation mechanism ...
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.