The Search for Extrasolar Earth-like Planets
... The search for extrasolar Earth-like planets is underway. Over 100 extrasolar giant planets are known to orbit nearby sun-like stars, including several in multiple-planet systems. These planetary systems are stepping stones for the search for Earth-like planets; the technology development, observati ...
... The search for extrasolar Earth-like planets is underway. Over 100 extrasolar giant planets are known to orbit nearby sun-like stars, including several in multiple-planet systems. These planetary systems are stepping stones for the search for Earth-like planets; the technology development, observati ...
introduction to astronomy
... This course meets the lecture portion of the lab/science general studies requirement for graduation when taken with the lab course (AST 102). This course is provided for students who cannot take the lecture and lab during the same semester. The combination of AST 101-102 is equivalent to AST 103. ...
... This course meets the lecture portion of the lab/science general studies requirement for graduation when taken with the lab course (AST 102). This course is provided for students who cannot take the lecture and lab during the same semester. The combination of AST 101-102 is equivalent to AST 103. ...
Astrometry: Revealing the Other Two Dimensions of
... first series of observations of ~700 objects. On 9 June 1803, he presented the paper “Account of the Changes that have happened, during the last Twenty-five Years, in the relative Situation of Double-Stars; with an Investigation of the Cause to which they are owing.” He used α Gem (Castor) to argue ...
... first series of observations of ~700 objects. On 9 June 1803, he presented the paper “Account of the Changes that have happened, during the last Twenty-five Years, in the relative Situation of Double-Stars; with an Investigation of the Cause to which they are owing.” He used α Gem (Castor) to argue ...
April 2017 - Warren Astronomical Society
... first detected by 8888 88 88888 8 888. Shortly unsettling.” One source said it seemed “totally after, the first in a series of 8888 88 88888 8 888 alien and unknowable.” 8888 88 88888 8 888 were discovered in orbit around the planet. Initial images have revealed At press time, NASA did not offer any ...
... first detected by 8888 88 88888 8 888. Shortly unsettling.” One source said it seemed “totally after, the first in a series of 8888 88 88888 8 888 alien and unknowable.” 8888 88 88888 8 888 were discovered in orbit around the planet. Initial images have revealed At press time, NASA did not offer any ...
Elliptical Galaxies
... •similar in form to globular clusters (i.e. nearly spherical) •little gas and dust -- no disk -- little or no star formation •little or no rotation •normal ellipticals can contain from 1 to 100 billion stars. •giant elliptical galaxies are found at the center of dense clusters of galaxies. •a giant ...
... •similar in form to globular clusters (i.e. nearly spherical) •little gas and dust -- no disk -- little or no star formation •little or no rotation •normal ellipticals can contain from 1 to 100 billion stars. •giant elliptical galaxies are found at the center of dense clusters of galaxies. •a giant ...
Exoplanets
... planet: located 20 light-years away, it may have water on its surface. (eso0722) 2006: Observations show that some objects that are several times the mass of Jupiter have a disc surrounding them and may form in a similar way to stars. It thus becomes much more difficult to define precisely what a ...
... planet: located 20 light-years away, it may have water on its surface. (eso0722) 2006: Observations show that some objects that are several times the mass of Jupiter have a disc surrounding them and may form in a similar way to stars. It thus becomes much more difficult to define precisely what a ...
Document
... – little star formation Quick Time™a nd a TIFF ( Uncomp res sed) deco mpre ssor are n eede d to s ee this picture . ...
... – little star formation Quick Time™a nd a TIFF ( Uncomp res sed) deco mpre ssor are n eede d to s ee this picture . ...
Galaxy Hunters Article, Cosmology Information, First Star Facts
... to be known as dark matter, outweighs all the visible material in the universe by at least nine to one. Galaxies are merely bright flecks on a sea of dark matter. Without the extra tug provided by dark matter, astronomers say, there wouldn't be enough gravity to pull material into galaxy-size clumps ...
... to be known as dark matter, outweighs all the visible material in the universe by at least nine to one. Galaxies are merely bright flecks on a sea of dark matter. Without the extra tug provided by dark matter, astronomers say, there wouldn't be enough gravity to pull material into galaxy-size clumps ...
The Solar Neighborhood
... 10. Why has a cluster with a turnoff color of B-V=0.9 never been discovered? ...
... 10. Why has a cluster with a turnoff color of B-V=0.9 never been discovered? ...
Additional Cosmology Images
... which shows the star-studded region around it. A close-up of the cluster can be seen in the inset photo. These large stars are a tip-off to the mass of the young cluster. Astronomers estimate that the cluster is at least 20,000 times as massive as the Sun. Each red supergiant is about 20 times the S ...
... which shows the star-studded region around it. A close-up of the cluster can be seen in the inset photo. These large stars are a tip-off to the mass of the young cluster. Astronomers estimate that the cluster is at least 20,000 times as massive as the Sun. Each red supergiant is about 20 times the S ...
Research Paper Trojans in Habitable Zones
... closer to the star in stable low eccentric orbits in the HZ. 3. If the GG moves into the HZ there are two possible motion scenarios: • The satellite configuration. A terrestrial planet that orbits a GG in the HZ could potentially develop a biosphere. • The Trojan configuration. When a GG moves into ...
... closer to the star in stable low eccentric orbits in the HZ. 3. If the GG moves into the HZ there are two possible motion scenarios: • The satellite configuration. A terrestrial planet that orbits a GG in the HZ could potentially develop a biosphere. • The Trojan configuration. When a GG moves into ...
CONTINUING GALACTIC FORMATION
... -Gravitational waves are detected emanating from our galactic center at the rate of about one per day. The twin star system is the result of the shotgun effect as the condensing stars of all sizes are thrown out at approximately the same velocities. Two stars can begin orbiting one another as they l ...
... -Gravitational waves are detected emanating from our galactic center at the rate of about one per day. The twin star system is the result of the shotgun effect as the condensing stars of all sizes are thrown out at approximately the same velocities. Two stars can begin orbiting one another as they l ...
Diapositiva 1
... which provides, in principle, perfect on-axis images. • This design exhibits no spherical aberration on-axis but suffers from field curvature, coma and astigmatism, which make the angular resolution to degrade rapidly with increasing off-axis angles. • More general mirror designs than Wolter's exist ...
... which provides, in principle, perfect on-axis images. • This design exhibits no spherical aberration on-axis but suffers from field curvature, coma and astigmatism, which make the angular resolution to degrade rapidly with increasing off-axis angles. • More general mirror designs than Wolter's exist ...
The Milky Way - Houston Community College System
... Binary Stars More than 50 % of all stars in our Milky Way are not single stars, but belong to binaries: Pairs or multiple systems of stars which orbit their common center of mass. If we can measure and understand their orbital motion, we can estimate the stellar ...
... Binary Stars More than 50 % of all stars in our Milky Way are not single stars, but belong to binaries: Pairs or multiple systems of stars which orbit their common center of mass. If we can measure and understand their orbital motion, we can estimate the stellar ...
userfiles/602xxh/files/2013%e5%b1%8a%e9%ab%98%e4%b8%89
... burst into tears when they see each other again” 推断D项正确。 5．B 细节理解题。根据最后一段“Lampard got Muffy as a gift for her now 17yearold daughter Chloe, and the two had been friendly with each other”可判断选B。 ...
... burst into tears when they see each other again” 推断D项正确。 5．B 细节理解题。根据最后一段“Lampard got Muffy as a gift for her now 17yearold daughter Chloe, and the two had been friendly with each other”可判断选B。 ...
uniview glossary - DMNS Galaxy Guide Portal
... Saturn was named for the Roman god of agriculture and lies 885 million miles from the Sun, (9.6 AU). Saturn takes 29.5 years to orbit, but only 10.7 hours to rotate (day). Its diameter is 75,000 miles, making it the second largest planet. Its mass is 95 times that of Earth. It is the second of the f ...
... Saturn was named for the Roman god of agriculture and lies 885 million miles from the Sun, (9.6 AU). Saturn takes 29.5 years to orbit, but only 10.7 hours to rotate (day). Its diameter is 75,000 miles, making it the second largest planet. Its mass is 95 times that of Earth. It is the second of the f ...
Procedurally Generating an Artificial Galaxy
... obviously want three dimensions. So we bring in (Z), an integer ranging from -50 to +49. This gives us a three-dimensional grid (X,Y,Z). With one cube at every combination of X, Y and Z, we have 10 000 × 10 000 × 100 = 1010 cubes. The density of stars in every cube is set by its position in the grid ...
... obviously want three dimensions. So we bring in (Z), an integer ranging from -50 to +49. This gives us a three-dimensional grid (X,Y,Z). With one cube at every combination of X, Y and Z, we have 10 000 × 10 000 × 100 = 1010 cubes. The density of stars in every cube is set by its position in the grid ...
Determining the Origin of Inner Planetary System Debris Orbiting the
... 2. Transient or Steady-state Dust Production? To classify systems with terrestrial planet-zone dust into these two regimes − an active planetesimal belt or giant impacts − we begin with the assumption that all inner planetary system dust disks are the product of collisions of numerous small rocky bo ...
... 2. Transient or Steady-state Dust Production? To classify systems with terrestrial planet-zone dust into these two regimes − an active planetesimal belt or giant impacts − we begin with the assumption that all inner planetary system dust disks are the product of collisions of numerous small rocky bo ...
Lecture 3
... • Imagine a star with a relatively cool (4000k) atmosphere. Temperature is just a measure of the average velocity of the atoms and molecules in a gas. For a relatively cool gas there are: (1) Few atomic collisions with enough energy to knock electrons up to the 1st excited state so the majority of t ...
... • Imagine a star with a relatively cool (4000k) atmosphere. Temperature is just a measure of the average velocity of the atoms and molecules in a gas. For a relatively cool gas there are: (1) Few atomic collisions with enough energy to knock electrons up to the 1st excited state so the majority of t ...
Astronomy in 1936 The History of the Universe
... From: Toomre, Annual Review of Astronomy & Astrophysics, 1977 Vol. 15, 437. ...
... From: Toomre, Annual Review of Astronomy & Astrophysics, 1977 Vol. 15, 437. ...
Question 1
... b) The rotation of the bulge and disk components c) The Sun’s age and age of the globular cluster stars d) The motion of spiral arms and the mass of the central black hole e) The orbital period and distance from the Galactic center of objects near the edge of the Galaxy Explanation: Use the modified ...
... b) The rotation of the bulge and disk components c) The Sun’s age and age of the globular cluster stars d) The motion of spiral arms and the mass of the central black hole e) The orbital period and distance from the Galactic center of objects near the edge of the Galaxy Explanation: Use the modified ...
Space Interferometry Mission
The Space Interferometry Mission, or SIM, also known as SIM Lite (formerly known as SIM PlanetQuest), was a planned space telescope developed by the U.S. National Aeronautics and Space Administration (NASA), in conjunction with contractor Northrop Grumman. One of the main goals of the mission was the hunt for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun. SIM was postponed several times and finally cancelled in 2010.In addition to hunting for extrasolar planets, SIM would have helped astronomers construct a map of the Milky Way galaxy. Other important tasks would have included collecting data to help pinpoint stellar masses for specific types of stars, assisting in the determination of the spatial distribution of dark matter in the Milky Way and in the Local Group of galaxies and using the gravitational microlensing effect to measure the mass of stars.The spacecraft would have used optical interferometry to accomplish these and other scientific goals. This technique collects light with multiple mirrors (in SIM's case, two) which is combined to make an interference pattern which can be very precisely measured.The initial contracts for SIM Lite were awarded in 1998, totaling US$200 million. Work on the SIM project required scientists and engineers to move through eight specific new technology milestones, and by November 2006, all eight had been completed.SIM Lite was originally scheduled for a 2005 launch, aboard an Evolved Expendable Launch Vehicle (EELV). As a result of continued budget cuts, the launch date has been pushed back at least five times. NASA has set a preliminary launch date for 2015 and U.S. federal budget documents confirm that a launch date is expected ""no earlier"" than 2015. The budget cuts to SIM Lite are expected to continue through FY 2010. As of February 2007, many of the engineers working on the SIM program had moved on to other areas and projects, and NASA directed the project to allocate its resources toward engineering risk reduction. However, the preliminary budget for NASA for 2008 included zero dollars for SIM.In December 2007, the Congress restored funding for fiscal year 2008 as part of an omnibus appropriations bill which the President later signed. At the same time the Congress directed NASA to move the mission forward to the development phase. In 2009 the project continued its risk reduction work while waiting for the findings and recommendations of the Astronomy and Astrophysics Decadal Survey, Astro2010, performed by the National Academy of Sciences, which would determine the project's future.On 13 August 2010, the Astro2010 Decadal Report was released and did not recommend that NASA continue the development of the SIM Lite Astrometric Observatory. This prompted NASA Astronomy and Physics Director, Jon Morse, to issue a letter on 24 September 2010 to the SIM Lite project manager, informing him that NASA was discontinuing its sponsorship of the SIM Lite mission and directing the project to discontinue Phase B activities immediately or as soon as practical. Accordingly, all SIM Lite activities were closed down by the end of calendar year 2010.