Test - Scioly.org
... A special type of object F that young stars undergo stages of about 10-20 times before entering the main-sequence. ...
... A special type of object F that young stars undergo stages of about 10-20 times before entering the main-sequence. ...
Life Cycle of a Star
... • A contracting cloud of gas and dust • Pressure and heat start nuclear fusion ...
... • A contracting cloud of gas and dust • Pressure and heat start nuclear fusion ...
Seeing Through the Clouds of Venus
... A couple of things to know… • The sun gets ~6% more luminous every 1 billion years • As the sun gets brighter (hotter) with time, the region around the star where habitable planetary temperatures are possible gets pushed outward At a later Sme: Sun is brighter ...
... A couple of things to know… • The sun gets ~6% more luminous every 1 billion years • As the sun gets brighter (hotter) with time, the region around the star where habitable planetary temperatures are possible gets pushed outward At a later Sme: Sun is brighter ...
Document
... ratio of Type I & II migration may be less than previously thought (Winn et al. 2010) one cannot distinguish between p-p scattering and Kozai migration by spin-orbit misalignments or eccentricities alone Need to search for counterparts of migration processes very long term radial velocity me ...
... ratio of Type I & II migration may be less than previously thought (Winn et al. 2010) one cannot distinguish between p-p scattering and Kozai migration by spin-orbit misalignments or eccentricities alone Need to search for counterparts of migration processes very long term radial velocity me ...
The Death of a Low Mass Star
... – looking through a greater depth of material at the edges Core of “dead” star ...
... – looking through a greater depth of material at the edges Core of “dead” star ...
Space and the Solar System
... superheated gases. The nearest star to Earth, after the sun, is 40 trillion kilometers away. • Stars are formed by clouds of gases and dust in space. • These gases and dust come together and begin to spin. This action eventually forms a star. ...
... superheated gases. The nearest star to Earth, after the sun, is 40 trillion kilometers away. • Stars are formed by clouds of gases and dust in space. • These gases and dust come together and begin to spin. This action eventually forms a star. ...
Life of a star - bahringcarthnoians
... enough to swallow the inner planets, up to Earth. But don’t panic, because this won’t happen for about 4.5 billion years. ...
... enough to swallow the inner planets, up to Earth. But don’t panic, because this won’t happen for about 4.5 billion years. ...
Summary of Objectives for Test 1
... Why does Venus exhibit phases, but Mars does not? (Hint: Draw the Sun as well as Venus, Earth and Mars in their orbits. Shade in Venus and Mars. What do they look like from Earth’s view?) ...
... Why does Venus exhibit phases, but Mars does not? (Hint: Draw the Sun as well as Venus, Earth and Mars in their orbits. Shade in Venus and Mars. What do they look like from Earth’s view?) ...
Evolution and the Big Bang, ET Life Lec. 6, Jan 18, 2002
... Example 14C has a half life of about 5000 years. After 5000 years half of the original 14C is gone and after 10,000 years ¾ of original amount has decayed. Note, need to chose an isotope with a half life comparable to the age you are trying to measure. Cant use 14C to measure 4.6 Billion year age of ...
... Example 14C has a half life of about 5000 years. After 5000 years half of the original 14C is gone and after 10,000 years ¾ of original amount has decayed. Note, need to chose an isotope with a half life comparable to the age you are trying to measure. Cant use 14C to measure 4.6 Billion year age of ...
teachers` answers for Secondary Visit Guide and Activities
... The Cassini-Huygens space probe explored the gas giant Saturn and its largest moon Titan. Titan is -190 °C and rains liquid methane. There are pebbles and boulders on the surface made of ice. ...
... The Cassini-Huygens space probe explored the gas giant Saturn and its largest moon Titan. Titan is -190 °C and rains liquid methane. There are pebbles and boulders on the surface made of ice. ...
The MAS Winter Schedule February 21st: Membership Meeting at
... Like just about every Spitzer data also suggest other exoplanet that carbon monoxide and discovered so far, WASPcarbon dioxide exist in the 43b is no vacation spot. atmosphere. The place The planet is the size of seems to be too hot for Jupiter but twice as clouds. massive. Indeed, the planet is sli ...
... Like just about every Spitzer data also suggest other exoplanet that carbon monoxide and discovered so far, WASPcarbon dioxide exist in the 43b is no vacation spot. atmosphere. The place The planet is the size of seems to be too hot for Jupiter but twice as clouds. massive. Indeed, the planet is sli ...
Astronomy 120
... (a) Capella and the sun have roughly the same surface temperature. Which star is larger? (b) Regulus and Capella have about the same luminosity. Which star is larger? (c) Vega and Sirius have about the same surface temperature. Which star is more luminous? (d) Which star would appear redder, Vega or ...
... (a) Capella and the sun have roughly the same surface temperature. Which star is larger? (b) Regulus and Capella have about the same luminosity. Which star is larger? (c) Vega and Sirius have about the same surface temperature. Which star is more luminous? (d) Which star would appear redder, Vega or ...
View SKYTRACK_Glossary of Terms
... and Venus) occasionally cross directly in front of the Sun, where they appear as dark dots against the bright disk of the Sun. Tropical year – The length of time that the Sun, as viewed from the Earth, takes to return to the same position along the ecliptic, such as a solstice or equinox. The mean i ...
... and Venus) occasionally cross directly in front of the Sun, where they appear as dark dots against the bright disk of the Sun. Tropical year – The length of time that the Sun, as viewed from the Earth, takes to return to the same position along the ecliptic, such as a solstice or equinox. The mean i ...
Evolution Cycle of Stars
... • This is a large bright star with a cool surface. It is formed during the later stages of the evolution of a star like the Sun, as it runs out of hydrogen fuel at its centre and the helium causes it to swell. • Red giants have diameter's between 10 and 100 times that of the Sun. They are very brigh ...
... • This is a large bright star with a cool surface. It is formed during the later stages of the evolution of a star like the Sun, as it runs out of hydrogen fuel at its centre and the helium causes it to swell. • Red giants have diameter's between 10 and 100 times that of the Sun. They are very brigh ...
Neptune and Beyond, Asteroids, Comets
... Hershel ‘asteroid’ (meaning star-like object) More than 300,000 asteroids have been identified and cataloged, over a million asteroids lager than 1km are estimated to be there and many millions smaller ones. ...
... Hershel ‘asteroid’ (meaning star-like object) More than 300,000 asteroids have been identified and cataloged, over a million asteroids lager than 1km are estimated to be there and many millions smaller ones. ...
Voyage: A Journey Through Our Solar System Grades K
... The Sun is a star. Why does it look so big and bright compared to the other stars? Because it is much closer than the other stars, not because it is bigger—it is only an average sized star. Did the position of Mercury surprise you? Mercury orbits the Sun faster than any other planet (once every 88 d ...
... The Sun is a star. Why does it look so big and bright compared to the other stars? Because it is much closer than the other stars, not because it is bigger—it is only an average sized star. Did the position of Mercury surprise you? Mercury orbits the Sun faster than any other planet (once every 88 d ...
Star Questions 2008 - Fort Thomas Independent Schools
... 12. Which is more luminous, a low-mass or a high-mass star? Explain. High mass stars are larger, so they emit more electromagnetic radiation or energy. 13. What is a neutron star? ...
... 12. Which is more luminous, a low-mass or a high-mass star? Explain. High mass stars are larger, so they emit more electromagnetic radiation or energy. 13. What is a neutron star? ...
Chapter20
... •After helium burning begins, a star has two sources of energy, hydrogen fusion in a shell around the core and helium fusion in the core •The core of the star becomes rich in carbon and oxygen nuclei, and the star's surface temperature goes up to become a horizontal branch star •Stars with masses gr ...
... •After helium burning begins, a star has two sources of energy, hydrogen fusion in a shell around the core and helium fusion in the core •The core of the star becomes rich in carbon and oxygen nuclei, and the star's surface temperature goes up to become a horizontal branch star •Stars with masses gr ...
Brock physics - Brock University
... 22. A star that is cool and very luminous must have (a) a very great distance. (b) a very large radius. (c) a very small mass. (d) a very small radius. 23. Stars with masses in excess of 50 solar masses are very common. (a) True. (b) False. 24. The spectroscopic binaries are detected (a) as separate ...
... 22. A star that is cool and very luminous must have (a) a very great distance. (b) a very large radius. (c) a very small mass. (d) a very small radius. 23. Stars with masses in excess of 50 solar masses are very common. (a) True. (b) False. 24. The spectroscopic binaries are detected (a) as separate ...
Eratosthenes (250 B.C) Ptolemy`s Geocentric Model
... orbited the sun, and spun on its axis (most of that due to Galileo—stay tuned! Missing: an explanation of Why the planets orbited the sun and why Kepler's mysterious laws NASA’s Project were true! Kepler—to detect terrestrial planets orbiting other stars! ...
... orbited the sun, and spun on its axis (most of that due to Galileo—stay tuned! Missing: an explanation of Why the planets orbited the sun and why Kepler's mysterious laws NASA’s Project were true! Kepler—to detect terrestrial planets orbiting other stars! ...
Properties of Stars: The H
... • There is a very interesting story of the chemical enrichment history of the Galaxy and Universe that goes with these `metal-poor’ stars that we will return to in a few weeks. For now will only note that the chemically deficient stars are the oldest stars in the Galaxy. So far the most chemically d ...
... • There is a very interesting story of the chemical enrichment history of the Galaxy and Universe that goes with these `metal-poor’ stars that we will return to in a few weeks. For now will only note that the chemically deficient stars are the oldest stars in the Galaxy. So far the most chemically d ...
Exam2 Review Slides
... • As a massive star burns its hydrogen, helium is left behind, like ashes in a fireplace • Eventually the temperature climbs enough so that the helium begins to burn, fusing into Carbon. Hydrogen continues to burn in a shell around the helium core • Carbon is left behind until it too starts to fuse ...
... • As a massive star burns its hydrogen, helium is left behind, like ashes in a fireplace • Eventually the temperature climbs enough so that the helium begins to burn, fusing into Carbon. Hydrogen continues to burn in a shell around the helium core • Carbon is left behind until it too starts to fuse ...
ppt - Astronomy & Physics
... these stars from spectral lines. Their classes – A, B, C, D, etc, were mostly based on temperature and hydrogen lines ...
... these stars from spectral lines. Their classes – A, B, C, D, etc, were mostly based on temperature and hydrogen lines ...
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.