The Universe
... Nuclear Fusion – Two atoms are pushed together so hard they ‘fuse’ into one and create a different element ...
... Nuclear Fusion – Two atoms are pushed together so hard they ‘fuse’ into one and create a different element ...
The Solar System
... nuclear fusion in centre, becoming a star. • Associated with disks ( planetary systems), outflows and jets. • Disperse their cocoon to become visible. • Typically form in clusters, dominated by light from 1–2 brightest members. GENS4001 Astronomy ...
... nuclear fusion in centre, becoming a star. • Associated with disks ( planetary systems), outflows and jets. • Disperse their cocoon to become visible. • Typically form in clusters, dominated by light from 1–2 brightest members. GENS4001 Astronomy ...
Slide 1
... large spirals, 12 dwarf ellipticals, 4 ellipticals, and 8 Irr. Dust in the plane of the Milky Way may obscure more. ...
... large spirals, 12 dwarf ellipticals, 4 ellipticals, and 8 Irr. Dust in the plane of the Milky Way may obscure more. ...
ref H-R Spectral types
... In this Activity we have had a look at the Balmer series, and how its occurrence in the photospheres of stars will vary with temperature. The temperature, and hence the colour and spectral line strength characteristics of stars, is used to classify them into types O, B, A, F, G, K and M-type stars. ...
... In this Activity we have had a look at the Balmer series, and how its occurrence in the photospheres of stars will vary with temperature. The temperature, and hence the colour and spectral line strength characteristics of stars, is used to classify them into types O, B, A, F, G, K and M-type stars. ...
PDF version (two pages, including the full text)
... Southern Cross and the Pointers (Alpha and Beta Centauri). Alpha Centauri is a triple system, with two sun like stars orbiting each other every 80 years and a dim red dwarf tagging along at a much larger distance. This star was discovered by Robert Innes at the Union Observatory in Johannesburg in 1 ...
... Southern Cross and the Pointers (Alpha and Beta Centauri). Alpha Centauri is a triple system, with two sun like stars orbiting each other every 80 years and a dim red dwarf tagging along at a much larger distance. This star was discovered by Robert Innes at the Union Observatory in Johannesburg in 1 ...
The Hubble Mission - Indiana University Astronomy
... If the force actually changes with time, the Universe could still end in a Big Crunch or a Big Rip ... but not for at least an estimated 30 billion years ...
... If the force actually changes with time, the Universe could still end in a Big Crunch or a Big Rip ... but not for at least an estimated 30 billion years ...
Today`s Powerpoint
... So arms always contain same types of objects, but individual objects come and go. ...
... So arms always contain same types of objects, but individual objects come and go. ...
Fig. 16-7, p.363
... from a disk around the Sun as it formed; such protoplanetary disks are seen around many young stars • Planets like Earth are believed therefore to form as normal byproducts of stars forming • There are two types of planets in our solar system, Earth-like and Jupiter-like, results of a process we thi ...
... from a disk around the Sun as it formed; such protoplanetary disks are seen around many young stars • Planets like Earth are believed therefore to form as normal byproducts of stars forming • There are two types of planets in our solar system, Earth-like and Jupiter-like, results of a process we thi ...
Earth Science
... Some scientists suggest that the expanding universe has a limit and that one day the universe will begin to contract. It may then produce a “big crunch,” forming another original point that will produce yet another big bang. For this to happen, there must be enough matter in the universe to create t ...
... Some scientists suggest that the expanding universe has a limit and that one day the universe will begin to contract. It may then produce a “big crunch,” forming another original point that will produce yet another big bang. For this to happen, there must be enough matter in the universe to create t ...
1 Marsbugs: The Electronic Astrobiology Newsletter, Volume 12
... of the 160-some systems with planets discovered so far outside our own solar system. The inner planet, a "hot Jupiter" so close to the star that its orbit is only a few days, was discovered in 1996 by UC Berkeley's Geoff Marcy and his planet-hunting team. The two outer planets, with elongated orbits ...
... of the 160-some systems with planets discovered so far outside our own solar system. The inner planet, a "hot Jupiter" so close to the star that its orbit is only a few days, was discovered in 1996 by UC Berkeley's Geoff Marcy and his planet-hunting team. The two outer planets, with elongated orbits ...
Weighing a Galaxy—11 Nov Ast 207 F2005 Nov-09 • Schedule
... deuterium is less tightly bound, would there be more or less helium on the surface of the sun? ...
... deuterium is less tightly bound, would there be more or less helium on the surface of the sun? ...
Clear Skies - Cowichan Valley Starfinders Society
... The Star Party is coming along. I have spoken with Ron Wiens the manager of the R&G and we should have the agreement signed by the time you read this. We owe Gail Robertson many thanks; she has created a real snazzy poster for us. Any ideas for the Star Party? Please let me know either at the meetin ...
... The Star Party is coming along. I have spoken with Ron Wiens the manager of the R&G and we should have the agreement signed by the time you read this. We owe Gail Robertson many thanks; she has created a real snazzy poster for us. Any ideas for the Star Party? Please let me know either at the meetin ...
Fulltext PDF - Indian Academy of Sciences
... There is no fellow in the firmament. One important practice of scientists is to keep a log of what they do and observe. Nowhere has this been done with greater devotion than in astronomy where, since ancient times, one has been keeping accurate records of the position of stars in the sky. This was g ...
... There is no fellow in the firmament. One important practice of scientists is to keep a log of what they do and observe. Nowhere has this been done with greater devotion than in astronomy where, since ancient times, one has been keeping accurate records of the position of stars in the sky. This was g ...
Phys 214. Planets and Life
... How do we classify stars? Because all stars are born with basically the same composition (98% H & He), the physics that determines the star characteristics is straightforward. During the H burning phase, the star’s surface temperature (or spectral type) and total luminosity is determined almost ent ...
... How do we classify stars? Because all stars are born with basically the same composition (98% H & He), the physics that determines the star characteristics is straightforward. During the H burning phase, the star’s surface temperature (or spectral type) and total luminosity is determined almost ent ...
Diapositiva 1
... nebulae have long been appreciated as a final phase in the life of a sunlike star. Only much more recently however, have some planetaries been found to have halos like this one, likely formed of material shrugged off during earlier active episodes in the star's evolution. While the planetary nebula ...
... nebulae have long been appreciated as a final phase in the life of a sunlike star. Only much more recently however, have some planetaries been found to have halos like this one, likely formed of material shrugged off during earlier active episodes in the star's evolution. While the planetary nebula ...
ph507-16-1exo1
... patch of sky in the Cygnus region, monitoring 160,000 mainsequence stars. Detection of sub-Earth size planets was the mission's goal, with detection of planets with radii as small at 1 Mercury radius possible around M stars. http://kepler.nasa.gov/ Search of Kepler stellar light curves for the chara ...
... patch of sky in the Cygnus region, monitoring 160,000 mainsequence stars. Detection of sub-Earth size planets was the mission's goal, with detection of planets with radii as small at 1 Mercury radius possible around M stars. http://kepler.nasa.gov/ Search of Kepler stellar light curves for the chara ...
Lecture 17: General Relativity and Black Holes
... 33. The approximate number of stars in our galaxy? _______ 24. The approximate diameter of our own galaxy? _______ 25. The galactic north pole is in what constellation? _______ 1. The Sun is located at the center of the Milky Way Galaxy. True or false 2. Shapley overestimated the dimensions of the M ...
... 33. The approximate number of stars in our galaxy? _______ 24. The approximate diameter of our own galaxy? _______ 25. The galactic north pole is in what constellation? _______ 1. The Sun is located at the center of the Milky Way Galaxy. True or false 2. Shapley overestimated the dimensions of the M ...
STAR FORMATION (Ch. 19) The basics: GRAVITY vs. PRESSURE
... Very dense clusters, up to 106 stars within ~50 pc size. Most are very distant (~ 1,000 to 100,000 pc), and are not distributed in the disk of the Milky Way ⇒ they form a spherical “halo” around the Milky Way. H-R diagrams: MS includes low mass stars, but NO stars with mass > about 0.8 solar masses ...
... Very dense clusters, up to 106 stars within ~50 pc size. Most are very distant (~ 1,000 to 100,000 pc), and are not distributed in the disk of the Milky Way ⇒ they form a spherical “halo” around the Milky Way. H-R diagrams: MS includes low mass stars, but NO stars with mass > about 0.8 solar masses ...
About SDSS - Astro Projects
... the Milky Way. The survey also imaged very few globular clusters as these are spread out around the whole galaxy so that few of them happen to be in a direction directly above the Sun's position in the disc of the galaxy. From the point of view of doing a survey of the whole sky it is a pity that a ...
... the Milky Way. The survey also imaged very few globular clusters as these are spread out around the whole galaxy so that few of them happen to be in a direction directly above the Sun's position in the disc of the galaxy. From the point of view of doing a survey of the whole sky it is a pity that a ...
Two new transiting extra-solar planets discovered with SuperWASP
... phenomenon called a "photometric transit." The second involves the reflex motion of the star due to that orbiting body, and is called the "radial-velocity" method. The first yields information on the size of the orbiting body while the second gives crucial information about its mass which can reveal ...
... phenomenon called a "photometric transit." The second involves the reflex motion of the star due to that orbiting body, and is called the "radial-velocity" method. The first yields information on the size of the orbiting body while the second gives crucial information about its mass which can reveal ...
Last Year`s Exam, Section B
... when applied to extrasolar planetary systems. What factors enter into estimates of the number of technological civilisations in the Galaxy? Briefly discuss whether it is possible to make accurate estimates of the values of these factors. ...
... when applied to extrasolar planetary systems. What factors enter into estimates of the number of technological civilisations in the Galaxy? Briefly discuss whether it is possible to make accurate estimates of the values of these factors. ...
Properties of Stars: The H
... • Measure the size and speed of the Earth’s orbit, use the laws of gravity and motion and determine: Masso=2 x 1033Grams = 300,000 MEarth ...
... • Measure the size and speed of the Earth’s orbit, use the laws of gravity and motion and determine: Masso=2 x 1033Grams = 300,000 MEarth ...
Lecture 10: The Milky Way
... This gives us the absolute luminosities of low-mass stars, and using binary systems we can calibrate our models to true masses and radii (see earlier). The trouble is that within 100pc we have no massive stars and only 4 giants – how do we calibrate these? To get distances to objects further away we ...
... This gives us the absolute luminosities of low-mass stars, and using binary systems we can calibrate our models to true masses and radii (see earlier). The trouble is that within 100pc we have no massive stars and only 4 giants – how do we calibrate these? To get distances to objects further away we ...
Outside the Solar System Outside the Solar System OUTSIDE THE
... You have come 4.2 light-years from Earth. You’re arriving at Earth’s nearest star neighbor. It is Proxima Centauri, a dim, cool star. Do you see Proxima Centauri’s partner, Alpha Centauri? Up close, you can see that Alpha Centauri has two stars that are just like our Sun. On Earth, you saw constella ...
... You have come 4.2 light-years from Earth. You’re arriving at Earth’s nearest star neighbor. It is Proxima Centauri, a dim, cool star. Do you see Proxima Centauri’s partner, Alpha Centauri? Up close, you can see that Alpha Centauri has two stars that are just like our Sun. On Earth, you saw constella ...
In Retrospect: Kepler`s Astronomia Nova
... the centre of the Universe around which everything in the celestial domain revolves. Kepler was the first to realize that orbits are better described by ellipses traversed at nonuniform speed than by combinations of ‘perfect’ circular motions on which orbits had hitherto been modelled. Like a modern ...
... the centre of the Universe around which everything in the celestial domain revolves. Kepler was the first to realize that orbits are better described by ellipses traversed at nonuniform speed than by combinations of ‘perfect’ circular motions on which orbits had hitherto been modelled. Like a modern ...
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.