Extreme Optics and the Search for Earth-Like Planets
... • Are there Earth-like planets? • Are they common? • Is there life on some of them? ...
... • Are there Earth-like planets? • Are they common? • Is there life on some of them? ...
EarthComm_c1s3
... the big bang theory. However, it continues to be tested and examined. Another explanation is the steady-state theory. It is also known as the infinite-universe theory. This theory suggests the universe has always existed. It did not have a moment of creation, or a time zero. The theory suggests that ...
... the big bang theory. However, it continues to be tested and examined. Another explanation is the steady-state theory. It is also known as the infinite-universe theory. This theory suggests the universe has always existed. It did not have a moment of creation, or a time zero. The theory suggests that ...
Transits of planets: mean densities
... the di↵erent isotopes for the elements. A major disadvantage is that volatile elements are strongly depleted, most notably H, He, C, N, O, S, and the noble gases. Especially for the elements H, C, O, S, there are strong di↵erences between di↵erent chondritic meteorites, depending on the individual h ...
... the di↵erent isotopes for the elements. A major disadvantage is that volatile elements are strongly depleted, most notably H, He, C, N, O, S, and the noble gases. Especially for the elements H, C, O, S, there are strong di↵erences between di↵erent chondritic meteorites, depending on the individual h ...
Star Formation - Leslie Looney
... Planet Formation in the Disk Heavy elements clump 1.! Dust grains collide, stick, and form planetesimals– about 1012 of them, sort of like asteroids! All orbit in the same direction and in the same plane. 2.! Gravity Effects: Big planetesimals attract the smaller planetesimals. So, fewer and fewer o ...
... Planet Formation in the Disk Heavy elements clump 1.! Dust grains collide, stick, and form planetesimals– about 1012 of them, sort of like asteroids! All orbit in the same direction and in the same plane. 2.! Gravity Effects: Big planetesimals attract the smaller planetesimals. So, fewer and fewer o ...
From planetesimals to planetary systems: a hardles race
... significantly to the the growth of larger bodies). Each particle is representative of many particles (pre-clumping?) Drag is computed from nodes around the particle and back reaction acts on the nodes. What is the effect of spreading around the back reaction of the particles? Poor model of the ...
... significantly to the the growth of larger bodies). Each particle is representative of many particles (pre-clumping?) Drag is computed from nodes around the particle and back reaction acts on the nodes. What is the effect of spreading around the back reaction of the particles? Poor model of the ...
thefixedstarsinnatal.. - Saptarishis Astrology
... marked when rising, culminating, setting or on the nadir even when alone. In such cases all 1st magnitude stars give honor and preferment, which will be lost or retained with trouble and danger if the star be of the nature of Mars, while if it be like Saturn there will be final disgrace and ruin. Th ...
... marked when rising, culminating, setting or on the nadir even when alone. In such cases all 1st magnitude stars give honor and preferment, which will be lost or retained with trouble and danger if the star be of the nature of Mars, while if it be like Saturn there will be final disgrace and ruin. Th ...
The Milky Way Galaxy
... What is the ultimate origin of the elements heavier than helium that make up your body? (a) They were present when the Universe was created. (b) They were created in low mass (< 8 solar mass) stars ...
... What is the ultimate origin of the elements heavier than helium that make up your body? (a) They were present when the Universe was created. (b) They were created in low mass (< 8 solar mass) stars ...
The Constellations
... • With respect to the stars, planets usually move eastward from night to night relative to the stars. − You cannot see this motion on a single night, it is very slow. ...
... • With respect to the stars, planets usually move eastward from night to night relative to the stars. − You cannot see this motion on a single night, it is very slow. ...
1 Introduction - Instituto de Astrofísica de Canarias
... There is one methodology to obtain globally-integrated measurements of the sunlight reflected by Earth. Observations of the earthshine, the ghostly glow on the dark side of the Moon, provide direct estimates of the Earth’s albedo. The brightness ratio between the bright crescent of the Moon and tha ...
... There is one methodology to obtain globally-integrated measurements of the sunlight reflected by Earth. Observations of the earthshine, the ghostly glow on the dark side of the Moon, provide direct estimates of the Earth’s albedo. The brightness ratio between the bright crescent of the Moon and tha ...
Is there life in space? Activity 2: Moving Stars and Their Planets
... Q. Are you certain about your answer and explanation? A. Student answers will vary. Students should be fairly certain of their answers because they can test the scenario with the model. Q. Explain what influenced your certainty rating in the last question. A. Student answers will vary. Q. A scienti ...
... Q. Are you certain about your answer and explanation? A. Student answers will vary. Students should be fairly certain of their answers because they can test the scenario with the model. Q. Explain what influenced your certainty rating in the last question. A. Student answers will vary. Q. A scienti ...
Astronomy Glossary Key
... Galileo made the first telescope in 1609. He proved the heliocentric perspective and that planets move in variable speed, elliptical orbits. The Jovian planets, (gas planets) resemble Jupiter. They are farthest from the sun because during the formation of the solar system, the gasses were blown away ...
... Galileo made the first telescope in 1609. He proved the heliocentric perspective and that planets move in variable speed, elliptical orbits. The Jovian planets, (gas planets) resemble Jupiter. They are farthest from the sun because during the formation of the solar system, the gasses were blown away ...
American Scientist
... appear to lie roughly in the same orbital plane. The Kepler-16 system consists of a pair of stars orbited by a Saturnlike exoplanet, a harsh environment for any exoplanet to survive in because of the enhanced gravitational tugs of the stars. A diminutive red dwarf sits at the center of the Kepler-3 ...
... appear to lie roughly in the same orbital plane. The Kepler-16 system consists of a pair of stars orbited by a Saturnlike exoplanet, a harsh environment for any exoplanet to survive in because of the enhanced gravitational tugs of the stars. A diminutive red dwarf sits at the center of the Kepler-3 ...
Study Guide for the Comprehensive Final Exam
... Interpret stellar apparent magnitudes and their relationship to brightness. Interpret stellar absolute magnitudes and their relationship to luminosity. Solve problems relating to the relative brightness or luminosity of two stars given their m or M values. Determine the hottest and coolest stars fro ...
... Interpret stellar apparent magnitudes and their relationship to brightness. Interpret stellar absolute magnitudes and their relationship to luminosity. Solve problems relating to the relative brightness or luminosity of two stars given their m or M values. Determine the hottest and coolest stars fro ...
Stellar Evolution: Evolution: Birth, Life, and Death of Stars
... Sun--like stars The Sun-like star does not change much during the first ~90% of its life, as far as it has enough fuel (hydrogen) to continue with thermonuclear reactions. We call it a main sequence star. When its fuel, hydrogen, exhausts, it expands into a red giant star. Inside the core, the t ...
... Sun--like stars The Sun-like star does not change much during the first ~90% of its life, as far as it has enough fuel (hydrogen) to continue with thermonuclear reactions. We call it a main sequence star. When its fuel, hydrogen, exhausts, it expands into a red giant star. Inside the core, the t ...
The Sky Viewed from Earth - Beck-Shop
... Durchmusterung from the Bonn Observatory, published in 1859, the Henry Draper Catalog, established in the 1920s, and the Smithsonian Astrophysical Observatory Catalog, which was published in 1966. Stars are referred to by their number in the catalog, preceded by the prefixes BD, SAO, and HD, respecti ...
... Durchmusterung from the Bonn Observatory, published in 1859, the Henry Draper Catalog, established in the 1920s, and the Smithsonian Astrophysical Observatory Catalog, which was published in 1966. Stars are referred to by their number in the catalog, preceded by the prefixes BD, SAO, and HD, respecti ...
STAR FORMATION
... temperatures and densities adequate to allow ordinary fusion -- THE LOWER MASS LIMIT • Such failed stars are called brown dwarfs. • Most astronomers make a further distinction between brown dwarfs and even lower mass objects, with less than about 1.3% of M (or about 13 times Jupiter's mass): these ...
... temperatures and densities adequate to allow ordinary fusion -- THE LOWER MASS LIMIT • Such failed stars are called brown dwarfs. • Most astronomers make a further distinction between brown dwarfs and even lower mass objects, with less than about 1.3% of M (or about 13 times Jupiter's mass): these ...
The Great Nebula in Orion
... cool and fade from view, and unseen brown dwarfs represent an unknown fraction of the mass of the universe. In Orion, we can estimate the fraction of brown dwarfs in the general star-formation process, which can be used to constrain their total mass in the universe. We also see many circumstellar di ...
... cool and fade from view, and unseen brown dwarfs represent an unknown fraction of the mass of the universe. In Orion, we can estimate the fraction of brown dwarfs in the general star-formation process, which can be used to constrain their total mass in the universe. We also see many circumstellar di ...
Exoplanets
... 2006: Discovery of the first terrestrialsized exoplanet, five times the size of the Earth. (eso0603) 2005: Discovery of a planet with a mass comparable to Neptune around a low-mass star, the most common type of star in our galaxy. (eso0539) 2004: Ingredients for the formation of rocky planets ...
... 2006: Discovery of the first terrestrialsized exoplanet, five times the size of the Earth. (eso0603) 2005: Discovery of a planet with a mass comparable to Neptune around a low-mass star, the most common type of star in our galaxy. (eso0539) 2004: Ingredients for the formation of rocky planets ...
Document
... Identify the sun as an average main sequence star that will expand to a red giant phase, and then collapse into a white dwarf. As.6.2 Discuss why some stars end up as white dwarfs, neutron stars or black holes; describe properties of each and approximate sizes. Clarify difference in evolution ...
... Identify the sun as an average main sequence star that will expand to a red giant phase, and then collapse into a white dwarf. As.6.2 Discuss why some stars end up as white dwarfs, neutron stars or black holes; describe properties of each and approximate sizes. Clarify difference in evolution ...
DAY AND NIGHT, SEASONS
... exoplanet, facing away from the star, will be in permanent darkness and hence cold. There will be a twilight zone between these two regions which might be a suitable place for life. Alternatively, life might exist beneath the surface. For planets with an axial tilt life may only be able to survive i ...
... exoplanet, facing away from the star, will be in permanent darkness and hence cold. There will be a twilight zone between these two regions which might be a suitable place for life. Alternatively, life might exist beneath the surface. For planets with an axial tilt life may only be able to survive i ...
Abundance of Elements
... double peak, with the two components splits by ~ 10 mass units. (n,g) reactions : produced in ordinary stars with relatively weak neutron sources = s-process, Under explosive conditions (SN or neutron star collision) = r-process ...
... double peak, with the two components splits by ~ 10 mass units. (n,g) reactions : produced in ordinary stars with relatively weak neutron sources = s-process, Under explosive conditions (SN or neutron star collision) = r-process ...
study guide
... • Jupiter and Saturn are still “collapsing” and releasing heat • All have moons • Some are large, most are captured asteroids ...
... • Jupiter and Saturn are still “collapsing” and releasing heat • All have moons • Some are large, most are captured asteroids ...
A rocky planet transiting a nearby low-mass star
... star in our Galaxy and outnumber Sun-like stars by a ratio of 12:1. Recent results have shown that M dwarfs host Earth-sized planets in great numbers1, 2: the average number of M-dwarf planets that are between 0.5 to 1.5 times the size of Earth is at least 1.4 per star3. The nearest such planets kno ...
... star in our Galaxy and outnumber Sun-like stars by a ratio of 12:1. Recent results have shown that M dwarfs host Earth-sized planets in great numbers1, 2: the average number of M-dwarf planets that are between 0.5 to 1.5 times the size of Earth is at least 1.4 per star3. The nearest such planets kno ...
AWG recommendation on Cosmic Vision
... and may lead to the identification of unique biomarkers. The search for life on other planets will enable us to place life as it exists today on Earth in the context of planetary and biological evolution and survival. Being aware of the technical challenge to overcome the high brightness ratio betwe ...
... and may lead to the identification of unique biomarkers. The search for life on other planets will enable us to place life as it exists today on Earth in the context of planetary and biological evolution and survival. Being aware of the technical challenge to overcome the high brightness ratio betwe ...
Unpublished draft available in format
... same thing; in the case of stars, any given star may demonstrate a whole string of concepts; e.g. a giant star of a late spectral type (M, R, N, S) may also be a long-period variable. Theoretically it is possible to achieve a class number which compounds all such attributes, but this might be a very ...
... same thing; in the case of stars, any given star may demonstrate a whole string of concepts; e.g. a giant star of a late spectral type (M, R, N, S) may also be a long-period variable. Theoretically it is possible to achieve a class number which compounds all such attributes, but this might be a very ...
Planetary system
A planetary system is a set of gravitationally bound non-stellar objects in orbit around a star or star system. Generally speaking, systems with one or more planets constitute a planetary system, although such systems may also consist of bodies such as dwarf planets, asteroids, natural satellites, meteoroids, comets, planetesimals and circumstellar disks. The Sun together with its planetary system, which includes Earth, is known as the Solar System. The term exoplanetary system is sometimes used in reference to other planetary systems.A total of 1968 exoplanets (in 1248 planetary systems, including 490 multiple planetary systems) have been identified as of 1 October 2015.Of particular interest to astrobiology is the habitable zone of planetary systems where planets could have surface liquid water.